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High power amplifier for 1296
1 KW SSPA for 1.8-54 MHz
A 1.5 KW LPF for 160-6m
1.8 to 54 MHz Dual Directional Detector
1.8 to 54 MHz combiner set
Automatic Transverter Interface
1 KW 6 Meter LDMOS Amplifier
2 Meter 80W All Mode Amplifier
1 KW 2M LDMOS Amplifier
1 KW 222 MHz LDMOS Amplifier
500w 70cm Amplifier
1KW 70cm LDMOS Amplifier
A Big Power Supply for SSPAs
Low Pass Filter/Dual Directional Detector
Sampling RF Power
LED Bar Graph Meter
Amplifier Control Board
LNAs (preamps) and MMICs
LNA Sequencing and Protection
Building UHF Antennas
VHF OCXO
MIcrowave Marker
Crystal Oven Controller
Microwave L.O.
Latching Relay Driver
12 to 28v
Relay Sequencer
High Current DC Switch
L & S Band LNA
Microwave L.O. Filters
PC Board Filters
Using Inexpensive Relays
600w 23cm LDMOS Amplifier
XRF-286 Amplifiers for 23cm
150W 23CM Turn-Key Amplifier
300w 23cm Amplifier
200w 23cm Amplifier
100w 23cm "brick"
100w 23cm Transverter
60w 23 cm Amplifier
23 CM Beacon
23cm Signal Generator
23cm Double Quad
23cm filters
13cm filter
13cm Signal Generator
13cm Transverter
120w 13 cm Amplifier
300w 33cm Amplifier
33cm filter
33 cm Crystal Source
33cm Signal Generator
9cm Transverter
Transverter Selector
12 AND 28 volts
Klitzing Amplifiers
IC-910H tweaks
Audio Files
Parts I Can Supply
Current Projects
Links

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Parts I Can Supply

As of September (2021) the cost for copper material, which is used for heat spreaders, rf decks and amplifier systems, increased 50%. The costs doubled for Aluminum sheet, angle stock and plate, used in cabinets for complete amplifier systems. These increases on raw materials and other components made it necessary to adjust pricing on some of the products listed here.

Instructions on assembling and use of the kits listed here are contained in the articles on this site, as well as close-up component layout pictures to aid in assembly. Surface-mount parts are used throughout, so it is helpful to have some experience in working with them. There is a video here showing some of the techniques used in working with these components.

You can order any of the items listed here using the shopping cart provided, or by sending an email (see contact information above). Payment can be made with your PayPal account (if you have one), or a credit card of your choice at checkout. Parts are usually sent by Priority Mail the next business day for domestic shipments, and by either Priority Mail or first class mail for international shipments. Postage is added at checkout time, and is listed in the last step before placing the order.

To make navigation a little easier, I re-arranged this page so the major products are grouped into sections. Most of these sections also list accessories commonly used with those major items.

 

  A 600 watt 23cm LDMOS amplifier (1296MHz band)


 

Fully assembled and tested RF deck mounted on a 3" x 5" x 0.5" copper heat spreader, ready to bolt down to your heat sink. Requires 7 to 10w drive (15w max drive) for 600w or more out, 50v at up to 25 amps VDD, 12v @ 30ma for bias.

Assembled and tested, $710.00


Please read the kit assembly instructions before deciding to purchase the kit instead of the assembled/tested RF deck

600w 23cm RF deck basic kit, $145  

This kit includes the PCB. You will also need the copper heat spreader (available on the right) and the MRF13750 LDMOS to duplicate the complete RF deck listed above this kit

Blank board only for the 600w 23cm amplifier, $45  

Additional items useful for building a complete amplifier system are listed in this column

 

Recently, the cost for these devices dropped since they were first produced, the new pricing is listed here.

NXP MRF13750H LDMOS, $218.00    

 

600 Watt Turn-Key Amplifier for 1296

(requires an external 50v 30 amp power supply)


 

If you are interested in having one, please contact me at the email address or phone number listed at the top of this page. There are two versions of this amplifier available:

  • A desktop version for terrestrial or EME with internal microwave t/r relays. $3275 in black anodized finish, $3375 in light gray powder-coat. This version is limited to 500w in EME digital modes due to the power limitations of the output relay (no limitation in SSB/CW).

  • An "EME only" version without t/r relays. $2800 in black anodize, $2925 in light gray powder coat. A diagram of a typical setup for EME is shown here

Costs include shipping within the USA; international shipping adds about $100 depending on your location.

 

3 x 5 x 1/2" copper heat spreader, fully machined for the 600w 23cm rf deck $115.00  


 

Here is a video showing how to flow-solder your LDMOS to the spreader.

If you do not wish to do the flow-soldering procedure yourself, this service is available at the time you order your NXP MRF13750H with a copper spreader. Just add this service to your shopping cart.

LDMOS flow-solder attachment service, $20.00  

The Ultimate Amplifier Control Board

This is version 6, designed for the highest powered amplifiers and mast-mounted LNA's, with the following functions and features:

  • On-board sequencer for control of antenna relays, amplifier bias and power supply feeds, and driver RF hold-off
  • High VSWR lockout that will accept either a negative or a positive trigger signal
  • High temperature lockout that will bypass an overheated amplifier until it cools down to a safe temperature
  • Temperature-sensitive fan control for normal cooling
  • Driver RF blocking during antenna relay changeovers
  • Internal regulator, which allows operation from power sources ranging from 12v to 50v
  • LED indicator feeds for power, transmit, SWR lock and High Temperature lock
  • Can be used as a controller for a mast-mounted LNA

The temperature sensor, optional voltage reducer and indicator LEDs are supplied; the user must supply the vswr detector and the fan if those functions are to be used.

Unassembled kit (aprox 110 parts in the kit), $50  

Assembled and tested, $85  

 

High Current DC FET Switch

Can switch 12v, 28v, 50v or 65v ranges at more than 35 amps

 

This is Rev 3, an upgrade to the FET switch shown in the technical article. This switch includes the aluminum oxide ceramic insulator upgrade which is shipping with all switches beginning Sept. (2019)

 


 

Assembled and tested, low range, 13.5v (10-18v)   $21

Assembled and tested, mid range, 28v (18-35v)   $21

Assembled and tested, high range, 50v (35-55v)   $21

Assembled and tested, extra high range, 65v (55-75v)   $26

Ceramic insulator upgrade kit for FET switches purchased prior to Sept. (2019). The switches listed above are already supplied with these parts; this kit is for upgrading the mica insulator and other hardware on switches purchased prior to that date.

The insulator change provides better heat transfer and scratch/puncture resistance $2.50

 

LED Bar Graph Display

The current version changes R22 to a trimmer resistor, allowing the input sensitivity to be adjustable from less than 500mv to more than 15v.

Assembled/tested with red display $27.00  

Assembled/tested with green display $27.00  

Assembled/tested with yellow display $27.00  

Assembled/tested with dual color, 7 green 3 red $27.00  

 

 

Dual Microwave RF detector (38mm by 50mm)


Designed to be used with directional couplers lacking their own detectors. An explanation for the use of this board is explained in the Sampling RF Power article. By changing the values of the input attenuators, and the mounting positions of the diodes, the board can be configured for different power levels and output polarities. An assembly guide for the kit is here.

Complete kit, $20

 

LNAs (preamps) and MMICs

assembled/tested VHF/UHF LNA, 0.5 to 0.6 NF as shown above, $21

blank pc board only, $4

 

 

23cm High-Power Coupler (Ro4003C)

This coupler is for those of us combining the outputs of larger amplifiers, even the bigger XRF-286, 2C39, or GS-15B high-power amplifiers. Made from thick (.060) Rogers R04003 low-loss substrate, it will handle more than 500W at the output. Requires a termination for the isolated port (like the 150w termination offered below). There is a VIDEO here showing how to connect this coupler. The hardware kit listed below contains an .040 aluminum spacer and the fasteners mentioned in the video.

This link demonstrates a layout for combining 4 amplifiers (the layout method is the same as the 13cm couplers shown)

23cm High Power Coupler $20.00

 

Anaren or ATC 150w Termination (DC - 2.5 GHz), $15

Data sheet

 

1.8 to 54 MHz (160 through 6 meters)

 

1 KW SSPA for 1.8 to 54 MHz

This RF deck began shipping in December 2016; it was developed on .078 thick FR4, and incorporates all the changes made to the original one done on TC350

(see the new kit assembly instructions here)

The original assembly guide for this product is here

1.8-54 MHz Kilowatt RF Deck, Complete


 

Fully assembled and tested RF deck mounted on a 4" x 6.5" x .375" copper heat spreader, ready to bolt down to your heat sink. Requires 2 to 4w drive for 1kw out, 50v at up to 35 amps VDD, 12v @ 30ma for bias. (the reference technical article is here).

Assembled and tested as shown $838.00

Basic kit (pc board included) with all parts except LDMOS and copper spreader, $195

NXP BLF188XR LDMOS, $186.00  
 

4 x 6.5 x 3/8" copper heat spreader, fully machined $125.00  
 

Here is the original video showing how to flow-solder your LDMOS to the spreader

Complete copper heat spreader assembly with NXP BLF188XR LDMOS installed using flow-solder process: $331.00  
 

Blank PC board only, $35.00  


 

Additional items useful for building a complete amplifier system are listed in this column


1.5 KW Low Pass Filter Board for 1.8 to 54 MHz

Generation 2 filter (a description for this version is here); This version is rated for 2kw+


Unassembled 6-range filter kit, allowing multiple configurations for constructing an LPF for either single or dual-pallet LDMOS amplifiers of any type. $375

The assembly instructions and Bill of Materials for the generation 2 kit is here

Completed board (gen 2) for a single-pallet (1kw) amplifier, assembled, tested and tuned on a network analyzer $475

Completed board (gen 2) for a double-pallet (2kw+) amplifier, assembled, tested and tuned on a network analyzer $480

Blank PC board only, .094 FR4 $45.00


1.8-54 MHz Dual Directional Detector

This is 3rd revision with the following enhancements:

  • A sample port (-50dbc) has been added for forward power signal monitoring, or for use with adaptive feedback radios (Apache Labs Puresignal)
  • Output from the detectors can now be configured as either positive or negative
  • Parts for configuring as a band switch safety sensor are now included in the kit

Unassembled kit $40

Completed board as shown, assembled/tested/ optimized on a scalar anayzer, negative output (standard) $80

Assembled/tested board configured as a band select safety sensor, optimized on a scalar anayzer $80

blank PC board only $12

The assembly guide for this product is here


ALC Detector (26mm by 38mm)

Used at the input of an amplifier to provide an Automatic Level Control signal back to the driving radio. The adjustment trimmer can also be mounted to the back side of the PCB for panel mounting (with access hole for adjustment).

Unassembled kit $15

Assembled/tested with control mounted to component side $20

Assembled/tested with trimmer mounted to foil side (for panel mount with access hole) $20

 


High Current DC FET Switch

Can switch 12v, 28v, 50v or 65v ranges at more than 35 amps

 

This is Rev 3, an upgrade to the FET switch shown in the technical article. This switch includes the aluminum oxide ceramic insulator upgrade which is shipping with all switches beginning Sept. (2019)

 


 

Assembled and tested, low range, 13.5v (10-18v)   $21

Assembled and tested, mid range, 28v (18-35v)   $21

Assembled and tested, high range, 50v (35-55v)   $21

Assembled and tested, extra high range, 65v (55-75v)   $26

Ceramic insulator upgrade kit for FET switches purchased prior to Sept. (2019). The switches listed above are already supplied with these parts; this kit is for upgrading the mica insulator and other hardware on switches purchased prior to that date.

The insulator change provides better heat transfer and scratch/puncture resistance $2.50


The Ultimate Amplifier Control Board

This is version 6, designed for the highest powered amplifiers and mast-mounted LNA's, with the following functions and features:

  • On-board sequencer for control of antenna relays, amplifier bias and power supply feeds, and driver RF hold-off
  • High VSWR lockout that will accept either a negative or a positive trigger signal
  • High temperature lockout that will bypass an overheated amplifier until it cools down to a safe temperature
  • Temperature-sensitive fan control for normal cooling
  • Driver RF blocking during antenna relay changeovers
  • Internal regulator, which allows operation from power sources ranging from 12v to 50v
  • LED indicator feeds for power, transmit, SWR lock and High Temperature lock
  • Can be used as a controller for a mast-mounted LNA

The temperature sensor, optional voltage reducer and indicator LEDs are supplied; the user must supply the vswr detector and the fan if those functions are to be used.

Unassembled kit (aprox 110 parts in the kit), $50  

Assembled and tested, $85  


LED Bar Graph Display

The current version changes R22 to a trimmer resistor, allowing the input sensitivity to be adjustable from less than 500mv to more than 15v.

Assembled/tested with red display $27.00  

Assembled/tested with green display $27.00  

Assembled/tested with yellow display $27.00  

Assembled/tested with dual color, 7 green 3 red $27.00  

 


 


DC through UHF input Relay board

(please see the technical article here)

 

12v relay PCB as shown with DPDT relay, $20


High Power Output Relay Board

.094 FR4, DC through 2m, up to 1.5kw

 

12v high power relay PCB as shown with SPDT relay, $20

12v high power relay PCB with 2 meter compensation capacitors installed, $22


1.8 to 54 MHz Couplers

(for combining amplifiers)

1.8 to 54 MHz 2kw coupler, assembled $76.00

1.8 to 54 MHz input coupler, assembled $47.00

100 ohm 500 watt flange-mount resistor $51.00

 

6 meters (50-54 MHz)


 

6 Meter (single-band optimized) 1KW+ RF deck using the MRF1K50N, 1200w max

  $838.00 

Additional items useful for making a complete amplifier system for the 6m RF deck are listed in the 2 meter section below.

 

6 meter turn-key amplifiers can be built to order in several configurations; different attenuator values, painted or engraved front panel, etc. Custom builds take about 2 weeks from start to finish. The standard build is done in black anodized front panel finish with white lettering at $2650, and has a 13db input attenuator, suitable for 5w to 100w drivers. Other attenuator options are available; shipping within the US is included, international postage is a few $ more. A 10% deposit will get the process started, please contact me via email to order.

2 meters (144-148 MHz)


 


2 Meter Kilowatt and 1500 watt Amplifiers

The complete turn-key amplifier as shown in the web article, using the latest RF pallet. This amplifier also has a sequenced 13.5v power feed for operating a remote LNA, if you use one. Meets all FCC specs for harmonic and spurious signal suppression.

Requires a 50v 30a power supply (not included).

N0YK (Chad) also made a demo video for the one he has, and his can also be seen on YouTube, as well as on his web site at http://users.wbsnet.org/n0yk/kilowatt.htm

I build these to order in several configurations; different attenuator values, painted or engraved front panel, etc. Custom builds take about 2 weeks from start to finish. The standard build in black anodize (white lettering) is $2700, and has an engraved front panel, dual meters and a 10db input attenuator, suitable for 2.5w to 25w drivers. Cost for other options varies; powder -coat light gray (shown) is $2800; shipping within the US is included, international postage is a few $ more. A 10% deposit will get the process started, please contact me via email to order.

A 1500w version of this amplifier is also available ($2975); requires a 50v 40-42a power supply (not included)


 2 Meter Kilowatt RF Deck, Complete

Fully assembled and tested RF deck mounted on a 3.5" x 5.5" x 1/2" copper heat spreader, ready to bolt down to your heat sink. This is the newest RF deck design using coaxial matching capacitors in the critical spots, with DC power feeds directly to the drain connections on the LDMOS device; and the adjustable bias circuit is regulated and temperature compensated.

1kw output minimum, typical output at saturation is 1100 to 1200w. Requires aprox. 2w drive for 1kw out, 50v @ 30a VDD, 12v @ 30ma for bias. (the schematic for this unit is here).

Assembled and tested as shown $715.00


2 Meter Kilowatt RF Deck Kit

The kit provides all parts necessary to build the 2 Meter Kilowatt amplifier RF deck, and will work with the Freescale MRFE6VP1K25H, the NXP BLF578XR or the newer BLF188XR LDMOS devices. The board included in the kit has all the latest improvements (temperature compensated bias circuit, separate DC drain feeds to reduce transformer heating, and ruggedized coaxial output matching capacitors). All coax pieces are pre-cut and trimmed, ready to install. (The reference technical article is here).

Assembly instructions are here

Complete kit for building the RF deck shown on the right, supplied with machined copper spreader with NXP BLF188XR LDMOS attached, $481.00  


 

Or if you prefer, you can mix and match the various components below:

Basic kit (includes PC board), without copper spreader or LDMOS, $150.00  

3.5 x 5.5 x 1/2" copper heat spreader, fully machined $125.00  


 

NXP/Ampleon BLF188XR LDMOS, $186.00  
 

PC board only, $40.00  

Here is a video showing how to flow-solder your LDMOS to the spreader.

If you do not wish to do the flow-soldering procedure yourself, this service is available at the time you order your NXP BLF188XR with a copper spreader. Just add this service to your shopping cart (the complete kit already has this service included).

LDMOS flow-solder attachment service, $20.00  


2 Meter 1500 watt RF Deck, Complete with MRF1K50N LDMOS

Fully assembled and tested RF deck mounted on a 3.5" x 5.5" x 1/2" oversized copper heat spreader, ready to bolt down to your heat sink.

1500 watts output minimum, typical output at saturation is higher. Requires aprox. 5w drive for 1500w out, 50v @ 40-42a VDD, 12v @ 30ma for bias. (the schematic for this unit is here).

Shipments will be delayed until December (2021) due to long lead times on copper heat spreaders for this product;  Assembled and tested as shown $769.00

Basic kit (includes PC board), without copper spreader or LDMOS, $170.00  

Copper Heat Spreader for the MRF1K50N

Shipments will be delayed until December (2021) due to long lead times on copper heat spreaders for this product; 3.5 x 5.5 x 1/2" oversized copper heat spreader, fully machined for the MRF1K50N $125.00  


 


PC board only, $40.00  

Additional items useful for building complete amplifier systems are listed in this column


VHF/UHF Low Pass Filter and Dual Directional Detector board (for use with kilowatt 50, 70, 144, 222 or 432 MHz amplifiers)

The technical article is here

Blank board only (.060 Teflon) $45.00

Complete kit as shown for 50 MHz $75.00

Complete kit as shown for 70 MHz (4M) $75.00

Complete kit as shown for 144 MHz $75.00

Complete kit as shown for 222 MHz $75.00

Complete kit as shown for 70cm $60.00

Assembly and network analyzer tuning/testing service of any filter/detector kit $40.00


For 2m amplifiers capable of producing 1500w or more - a very high power version of the 2m filter/detector using Teflon coaxial capacitors, capable of 2000w+, assembled/tested/tuned
$135.00

 


The Ultimate Amplifier Control Board

This is version 6, designed for the highest powered amplifiers and mast-mounted LNA's, with the following functions and features:

  • On-board sequencer for control of antenna relays, amplifier bias and power supply feeds, and driver RF hold-off
  • High VSWR lockout that will accept either a negative or a positive trigger signal
  • High temperature lockout that will bypass an overheated amplifier until it cools down to a safe temperature
  • Temperature-sensitive fan control for normal cooling
  • Driver RF blocking during antenna relay changeovers
  • Internal regulator, which allows operation from power sources ranging from 12v to 50v
  • LED indicator feeds for power, transmit, SWR lock and High Temperature lock
  • Can be used as a controller for a mast-mounted LNA

The temperature sensor, optional voltage reducer and indicator LEDs are supplied; the user must supply the vswr detector and the fan if those functions are to be used.

Unassembled kit (aprox 110 parts in the kit), $50  

Assembled and tested, $85  


High Current DC FET Switch

Can switch 12v, 28v, 50v or 65v ranges at more than 35 amps

 

This is Rev 3, an upgrade to the FET switch shown in the technical article. This switch includes the aluminum oxide ceramic insulator upgrade which is shipping with all switches beginning Sept. (2019)

 


 

Assembled and tested, low range, 13.5v (10-18v)   $21

Assembled and tested, mid range, 28v (18-35v)   $21

Assembled and tested, high range, 50v (35-55v)   $21

Assembled and tested, extra high range, 65v (55-75v)   $26

Ceramic insulator upgrade kit for FET switches purchased prior to Sept. (2019). The switches listed above are already supplied with these parts; this kit is for upgrading the mica insulator and other hardware on switches purchased prior to that date.

The insulator change provides better heat transfer and scratch/puncture resistance $2.50


ALC Detector (26mm by 38mm)

Used at the input of an amplifier to provide an Automatic Level Control signal back to the driving radio. The adjustment trimmer can also be mounted to the back side of the PCB for panel mounting (with access hole for adjustment).

Unassembled kit $15

Assembled/tested with control mounted to component side $20

Assembled/tested with trimmer mounted to foil side (for panel mount with access hole) $20


 


LED Bar Graph Display

The current version changes R22 to a trimmer resistor, allowing the input sensitivity to be adjustable from less than 500mv to more than 15v.

Assembled/tested with red display $27.00  

Assembled/tested with green display $27.00  

Assembled/tested with yellow display $27.00  

Assembled/tested with dual color, 7 green 3 red $27.00  


 


DC through UHF input Relay board

(please see the technical article here)

 

12v relay PCB as shown with DPDT relay, $20


High Power Output Relay Board

.094 FR4, DC through 2m, up to 1.5kw

 

12v high power relay PCB as shown with SPDT relay, $20

12v high power relay PCB with 2 meter compensation capacitors installed, $22


HF, VHF and UHF input attenuators for LDMOS amplifiers

Reactance compensated for input VSWR less than 1.1 to1 across the entire band. Other values not shown below are available on request.

HF through 6 meter bands, 3db/100w, assembled and tested - $35.00

HF through 6 meter bands, 6db/90w, assembled and tested - $35.00

HF through 6 meter bands 10db/100w, assembled and tested - $35.00

HF through 6 meter bands, 13db/50w, assembled and tested - $35.00

HF through 6 meter bands, 13db/100w, assembled and tested - $47.00

HF through 6 meter bands, 16db/100w, assembled and tested - $47.00

2 meter band, 3db/100w, assembled and tested  - $35.00

2 meter band, 6db/90w, assembled and tested  - $35.00

2 meter band, 10db/100w, assembled and tested  - $35.00

2 meter band, 13db/50w, assembled and tested  - $35.00

2 meter band, 13db/100w, assembled and tested  - $47.00

2 meter band, 16db/100w, assembled and tested  - $47.00

220 MHz band, 6db/90w, assembled and tested - $35.00

70cm band, 3db/100w, assembled and tested - $35.00

70cm band, 6db/90w, assembled and tested $35.00


LNAs (preamps) and MMICs

assembled/tested VHF/UHF LNA, 0.5 to 0.6 NF as shown above, $21

blank pc board only, $4

 

222 MHzHz

222MHz Kilowatt RF Deck, Complete

Fully assembled and tested RF deck mounted on a 3.5" x 5.5" x 1/2" copper heat spreader, ready to bolt down to your heat sink. 1kw output minimum; typical output at saturation is 1100 to 1200w. Requires 4 to 5w drive for 1kw out, 50v @ 30a VDD, 12v @ 30ma for bias. (the reference technical article is here).

Assembled and tested as shown $705.00


222MHz Kilowatt RF Deck Kit

This kit provides all parts necessary to build the 222MHz Kilowatt amplifier RF deck, and will work with the Freescale MRFE6VP1K25H, the NXP BLF578XR or the newer BLF188XR LDMOS devices. The board included in the kit has all the latest improvements (temperature compensated bias circuit, separate DC drain feeds to reduce transformer heating, and ruggedized coaxial output matching capacitors). All coax pieces are pre-cut and trimmed, ready to install. The reference technical article is here).

Click here to view the assembly instructions for the board kit.

Complete kit for building the RF deck shown on the right, supplied with machined copper spreader and NXP BLF188XR LDMOS, $471.00  

Or if you prefer, you can mix and match the various components below:

Basic kit (includes PC board), without copper spreader or LDMOS  (includes PC board), $150.00  

3.5 x 5.5 x 1/2" copper heat spreader, fully machined $115.00  
 

NXP BLF188XR LDMOS, $186.00  
 

PC board only, $40.00  

Here is a video showing how to flow-solder your LDMOS to the spreader.

If you do not wish to do the flow-soldering procedure yourself, this service is available at the time you order your NXP BLF188XR with a copper spreader (or when you order the complete complete kit). Just add this service to your shopping cart.

LDMOS flow-solder attachment service, $20.00  


 

222 MHz Kilowatt Amplifier

The complete turn-key amplifier as shown in the web article, using the latest RF pallet. This amplifier also has a sequenced 13.5v power feed for operating a remote LNA, if you use one. Meets all FCC specs for harmonic and spurious signal suppression.

Requires a 50v 30a power supply (not included).

N0IRS (JD) took the time to make a demo video on the one I built for him, and it can be seen on YouTube here.

I can build these to order in other configurations; different attenuator values, painted or engraved front panel, etc. Custom builds take about 2 weeks from start to finish. Cost varies with options chosen $2700 in black anodize finish (white lettering), $2800 in the powder-coat gray color scheme shown above; shipping within the US is included, international postage is a few $ more. A 10% deposit will get the process started, please contact me via email if you would like to order one.

 

 

Additional items useful for building complete amplifier systems are listed in this column


VHF/UHF Low Pass Filter and Dual Directional Detector board (for use with kilowatt 50, 70, 144, 222 or 432 MHz amplifiers)

The technical article is here

Blank board only (.060 Teflon) $45.00

Complete kit as shown for 50 MHz $75.00

Complete kit as shown for 70 MHz (4M) $75.00

Complete kit as shown for 144 MHz $75.00

Complete kit as shown for 222 MHz $75.00

Complete kit as shown for 70cm $60.00

Assembly and network analyzer tuning/testing service of any filter/detector kit $40.00


For 2m amplifiers capable of producing 1500w or more - a very high power version of the 2m filter/detector using Teflon coaxial capacitors, capable of 2000w+, assembled/tested/tuned
$135.00


The Ultimate Amplifier Control Board

This is version 6, designed for the highest powered amplifiers and mast-mounted LNA's, with the following functions and features:

  • On-board sequencer for control of antenna relays, amplifier bias and power supply feeds, and driver RF hold-off
  • High VSWR lockout that will accept either a negative or a positive trigger signal
  • High temperature lockout that will bypass an overheated amplifier until it cools down to a safe temperature
  • Temperature-sensitive fan control for normal cooling
  • Driver RF blocking during antenna relay changeovers
  • Internal regulator, which allows operation from power sources ranging from 12v to 50v
  • LED indicator feeds for power, transmit, SWR lock and High Temperature lock
  • Can be used as a controller for a mast-mounted LNA

The temperature sensor, optional voltage reducer and indicator LEDs are supplied; the user must supply the vswr detector and the fan if those functions are to be used.

Unassembled kit (aprox 110 parts in the kit), $50  

Assembled and tested, $85  


High Current DC FET Switch

Can switch 12v, 28v, 50v or 65v ranges at more than 35 amps

 

This is Rev 3, an upgrade to the FET switch shown in the technical article. This switch includes the aluminum oxide ceramic insulator upgrade which is shipping with all switches beginning Sept. (2019)

 


 

Assembled and tested, low range, 13.5v (10-18v)   $21

Assembled and tested, mid range, 28v (18-35v)   $21

Assembled and tested, high range, 50v (35-55v)   $21

Assembled and tested, extra high range, 65v (55-75v)   $26

Ceramic insulator upgrade kit for FET switches purchased prior to Sept. (2019). The switches listed above are already supplied with these parts; this kit is for upgrading the mica insulator and other hardware on switches purchased prior to that date.

The insulator change provides better heat transfer and scratch/puncture resistance $2.50


ALC Detector (26mm by 38mm)

Used at the input of an amplifier to provide an Automatic Level Control signal back to the driving radio. The adjustment trimmer can also be mounted to the back side of the PCB for panel mounting (with access hole for adjustment).

Unassembled kit $15

Assembled/tested with control mounted to component side $20

Assembled/tested with trimmer mounted to foil side (for panel mount with access hole) $20


 


LED Bar Graph Display

The current version changes R22 to a trimmer resistor, allowing the input sensitivity to be adjustable from less than 500mv to more than 15v.

Assembled/tested with red display $27.00  

Assembled/tested with green display $27.00  

Assembled/tested with yellow display $27.00  

Assembled/tested with dual color, 7 green 3 red $27.00  


 


DC through UHF input Relay board

(please see the technical article here)

 

12v relay PCB as shown with DPDT relay, $20


High Power Output Relay Board

.094 FR4, DC through 2m, up to 1.5kw

 

12v high power relay PCB as shown with SPDT relay, $20

12v high power relay PCB with 2 meter compensation capacitors installed, $22


HF, VHF and UHF input attenuators for LDMOS amplifiers

Reactance compensated for input VSWR less than 1.1 to1 across the entire band. Other values not shown below are available on request.

HF through 6 meter bands, 3db/100w, assembled and tested - $35.00

HF through 6 meter bands, 6db/90w, assembled and tested - $35.00

HF through 6 meter bands 10db/100w, assembled and tested - $35.00

HF through 6 meter bands, 13db/50w, assembled and tested - $35.00

HF through 6 meter bands, 13db/100w, assembled and tested - $47.00

HF through 6 meter bands, 16db/100w, assembled and tested - $47.00

2 meter band, 3db/100w, assembled and tested  - $35.00

2 meter band, 6db/90w, assembled and tested  - $35.00

2 meter band, 10db/100w, assembled and tested  - $35.00

2 meter band, 13db/50w, assembled and tested  - $35.00

2 meter band, 13db/100w, assembled and tested  - $47.00

2 meter band, 16db/100w, assembled and tested  - $47.00

220 MHz band, 6db/90w, assembled and tested - $35.00

70cm band, 3db/100w, assembled and tested - $35.00

70cm band, 6db/90w, assembled and tested $35.00


LNAs (preamps) and MMICs

assembled/tested VHF/UHF LNA, 0.5 to 0.6 NF as shown above, $21

blank pc board only, $4

 

70 cm (420-450MHz)

(back in stock)

 

500 watt 70cm RF decks and sub-assemblies

For the NXP BLF184xr

7 to 8w in for 500w out

click here to view the assembly guide for this product

blank board only (TC-350 substrate, 2oz copper, plated in immersion gold) - $45  


Basic 500W amplifier kit for the NXP BLF184XR LDMOS transistor (does not include the LDMOS transistor) - $125  


3.5 x 5.5 x 1/2" oversized copper heat spreader fully machined for the NXP BLF184xr, $125.00  
 


One NXP BLF184XR LDMOS, $137.00  
 


Here is a video showing how to flow-solder your LDMOS to the spreader.

If you do not wish to do the flow-soldering procedure yourself, this service is available at the time you order your NXP BLF184XR with a copper spreader. Just add this service to your shopping cart.

LDMOS flow-solder attachment service, $20.00  


 

Assembled and tested RF deck using NXP BLF184XR LDMOS transistor, as shown above - $670  


VHF/UHF Low Pass Filter and Dual Directional Detector board (for use with kilowatt 50, 70, 144, 222 or 432 MHz amplifiers)

The technical article is here

Blank board only (.060 Teflon) $45.00

Complete kit as shown for 50 MHz $75.00

Complete kit as shown for 70 MHz (4M) $75.00

Complete kit as shown for 144 MHz $75.00

Complete kit as shown for 222 MHz $75.00

Complete kit as shown for 70cm $60.00

Assembly and network analyzer tuning/testing service of any filter/detector kit $40.00


For 2m amplifiers capable of producing 1500w or more - a very high power version of the 2m filter/detector using Teflon coaxial capacitors, capable of 2000w+, assembled/tested/tuned
$135.00


The Ultimate Amplifier Control Board

This is version 6, designed for the highest powered amplifiers and mast-mounted LNA's, with the following functions and features:

  • On-board sequencer for control of antenna relays, amplifier bias and power supply feeds, and driver RF hold-off
  • High VSWR lockout that will accept either a negative or a positive trigger signal
  • High temperature lockout that will bypass an overheated amplifier until it cools down to a safe temperature
  • Temperature-sensitive fan control for normal cooling
  • Driver RF blocking during antenna relay changeovers
  • Internal regulator, which allows operation from power sources ranging from 12v to 50v
  • LED indicator feeds for power, transmit, SWR lock and High Temperature lock
  • Can be used as a controller for a mast-mounted LNA

The temperature sensor, optional voltage reducer and indicator LEDs are supplied; the user must supply the vswr detector and the fan if those functions are to be used.

Unassembled kit (aprox 110 parts in the kit), $50  

Assembled and tested, $85  


High Current DC FET Switch

Can switch 12v, 28v, 50v or 65v ranges at more than 35 amps

 

This is Rev 3, an upgrade to the FET switch shown in the technical article. This switch includes the aluminum oxide ceramic insulator upgrade which is shipping with all switches beginning Sept. (2019)

 


 

Assembled and tested, low range, 13.5v (10-18v)   $21

Assembled and tested, mid range, 28v (18-35v)   $21

Assembled and tested, high range, 50v (35-55v)   $21

Assembled and tested, extra high range, 65v (55-75v)   $26

Ceramic insulator upgrade kit for FET switches purchased prior to Sept. (2019). The switches listed above are already supplied with these parts; this kit is for upgrading the mica insulator and other hardware on switches purchased prior to that date.

The insulator change provides better heat transfer and scratch/puncture resistance $2.50


ALC Detector (26mm by 38mm)

Used at the input of an amplifier to provide an Automatic Level Control signal back to the driving radio. The adjustment trimmer can also be mounted to the back side of the PCB for panel mounting (with access hole for adjustment).

Unassembled kit $15

Assembled/tested with control mounted to component side $20

Assembled/tested with trimmer mounted to foil side (for panel mount with access hole) $20


 


LED Bar Graph Display

The current version changes R22 to a trimmer resistor, allowing the input sensitivity to be adjustable from less than 500mv to more than 15v.

Assembled/tested with red display $27.00  

Assembled/tested with green display $27.00  

Assembled/tested with yellow display $27.00  

Assembled/tested with dual color, 7 green 3 red $27.00  

 


 


HF, VHF and UHF input attenuators for LDMOS amplifiers

Reactance compensated for input VSWR less than 1.1 to1 across the entire band. Other values not shown below are available on request.

HF through 6 meter bands, 3db/100w, assembled and tested - $35.00

HF through 6 meter bands, 6db/90w, assembled and tested - $35.00

HF through 6 meter bands 10db/100w, assembled and tested - $35.00

HF through 6 meter bands, 13db/50w, assembled and tested - $35.00

HF through 6 meter bands, 13db/100w, assembled and tested - $47.00

HF through 6 meter bands, 16db/100w, assembled and tested - $47.00

2 meter band, 3db/100w, assembled and tested  - $35.00

2 meter band, 6db/90w, assembled and tested  - $35.00

2 meter band, 10db/100w, assembled and tested  - $35.00

2 meter band, 13db/50w, assembled and tested  - $35.00

2 meter band, 13db/100w, assembled and tested  - $47.00

2 meter band, 16db/100w, assembled and tested  - $47.00

220 MHz band, 6db/90w, assembled and tested - $35.00

70cm band, 3db/100w, assembled and tested - $35.00

70cm band, 6db/90w, assembled and tested $35.00


LNAs (preamps) and MMICs

assembled/tested VHF/UHF LNA, 0.5 to 0.6 NF as shown above, $21

blank pc board only, $4

Multipurpose Items


Automatic (remote-controllable) solid-state transverter interface and selector

(click link above for technical article)

Unassembled board kit $80

Assembled and tested board $115

Blank PC board only $16

 

 

Dual Microwave RF detector (38mm by 50mm)


Designed to be used with directional couplers lacking their own detectors. An explanation for the use of this board is explained in the Sampling RF Power article. By changing the values of the input attenuators, and the mounting positions of the diodes, the board can be configured for different power levels and output polarities. An assembly guide for the kit is here.

Complete kit, $20

 

4-event sequencer

 

Assembled and tested $37.50

 

Latching Relay Driver


 Assembled and tested, positive pulses, $20

 Assembled and tested, negative pulses, $20

LNAs (preamps) and MMICs

assembled/tested VHF/UHF LNA, 0.5 to 0.6 NF as shown above, $21

blank pc board only, $4

13 cm High Power Coupler (Ro4003c)

For combining the outputs of two amplifiers (or more), and capable of power levels in excess of 500w. Rogers 4003c substrate, commercially manufactured. Designed for a frequency range of 2280 to 2500 MHz, and measures aprox. 1.5 inches square. V11a specs are identical to the previous version shown in the photos in the links below.

This link shows how to connect the coupler

This link shows coupling response

This link shows return loss response

This link shows isolation response

This link demonstrates a layout for combining 4 amplifiers

13 cm Coupler as shown, $20.00

Mosfet Module Amplifier Board Kit  - for any of the Mitsubishi RF modules in the H2 or H2S package; this board will also work with some of the Toshiba SAV modules.

 (SMT parts and blank board, does not include the mosfet module itself)

Unassembled kit, $15

Assembled, $22.50

 

High Current DC FET Switch

Can switch 12v, 28v, 50v or 65v ranges at more than 35 amps

 

This is Rev 3, an upgrade to the FET switch shown in the technical article. This switch includes the aluminum oxide ceramic insulator upgrade which is shipping with all switches beginning Sept. (2019)

 


 

Assembled and tested, low range, 13.5v (10-18v)   $21

Assembled and tested, mid range, 28v (18-35v)   $21

Assembled and tested, high range, 50v (35-55v)   $21

Assembled and tested, extra high range, 65v (55-75v)   $26

Ceramic insulator upgrade kit for FET switches purchased prior to Sept. (2019). The switches listed above are already supplied with these parts; this kit is for upgrading the mica insulator and other hardware on switches purchased prior to that date.

The insulator change provides better heat transfer and scratch/puncture resistance $2.50

 

The Ultimate Amplifier Control Board

This is version 6, designed for the highest powered amplifiers and mast-mounted LNA's, with the following functions and features:

  • On-board sequencer for control of antenna relays, amplifier bias and power supply feeds, and driver RF hold-off
  • High VSWR lockout that will accept either a negative or a positive trigger signal
  • High temperature lockout that will bypass an overheated amplifier until it cools down to a safe temperature
  • Temperature-sensitive fan control for normal cooling
  • Driver RF blocking during antenna relay changeovers
  • Internal regulator, which allows operation from power sources ranging from 12v to 50v
  • LED indicator feeds for power, transmit, SWR lock and High Temperature lock
  • Can be used as a controller for a mast-mounted LNA

The temperature sensor, optional voltage reducer and indicator LEDs are supplied; the user must supply the vswr detector and the fan if those functions are to be used.

Unassembled kit (aprox 110 parts in the kit), $50  

Assembled and tested, $85  

 

LED Bar Graph Display

The current version changes R22 to a trimmer resistor, allowing the input sensitivity to be adjustable from less than 500mv to more than 15v.

Assembled/tested with red display $27.00  

Assembled/tested with green display $27.00  

Assembled/tested with yellow display $27.00  

Assembled/tested with dual color, 7 green 3 red $27.00  

 

Anaren or ATC 150w Termination (DC - 2.5 GHz), $15

Data sheet

 

 

DC through UHF input Relay board

(please see the technical article here)

 

12v relay PCB as shown with DPDT relay, $20

High Power Output Relay Board

.094 FR4, DC through 2m, up to 1.5kw

 

12v high power relay PCB as shown with SPDT relay, $20

12v high power relay PCB with 2 meter compensation capacitors installed, $22

 

50 watt dc through 1.7 GHz relay board

 

 

12v relay PCB as shown with 50w SPDT microwave relay, $28

Blank PCB only, $6

 

VHF/UHF Low Pass Filter and Dual Directional Detector board (for use with kilowatt 50, 70, 144, 222 or 432 MHz amplifiers)

The technical article is here

Blank board only (.060 Teflon) $45.00

Complete kit as shown for 50 MHz $75.00

Complete kit as shown for 70 MHz (4M) $75.00

Complete kit as shown for 144 MHz $75.00

Complete kit as shown for 222 MHz $75.00

Complete kit as shown for 70cm $60.00

Assembly and network analyzer tuning/testing service of any filter/detector kit $40.00


For 2m amplifiers capable of producing 1500w or more - a very high power version of the 2m filter/detector using Teflon coaxial capacitors, capable of 2000w+, assembled/tested/tuned
$135.00

 

HF, VHF and UHF input attenuators for LDMOS amplifiers

Reactance compensated for input VSWR less than 1.1 to1 across the entire band. Other values not shown below are available on request.

HF through 6 meter bands, 3db/100w, assembled and tested - $35.00

HF through 6 meter bands, 6db/90w, assembled and tested - $35.00

HF through 6 meter bands 10db/100w, assembled and tested - $35.00

HF through 6 meter bands, 13db/50w, assembled and tested - $35.00

HF through 6 meter bands, 13db/100w, assembled and tested - $47.00

HF through 6 meter bands, 16db/100w, assembled and tested - $47.00

2 meter band, 3db/100w, assembled and tested  - $35.00

2 meter band, 6db/90w, assembled and tested  - $35.00

2 meter band, 10db/100w, assembled and tested  - $35.00

2 meter band, 13db/50w, assembled and tested  - $35.00

2 meter band, 13db/100w, assembled and tested  - $47.00

2 meter band, 16db/100w, assembled and tested  - $47.00

220 MHz band, 6db/90w, assembled and tested - $35.00

70cm band, 3db/100w, assembled and tested - $35.00

70cm band, 6db/90w, assembled and tested $35.00


Heat sink material

I no longer supply heat sinks as a part, but you can still purchase the material directly from www.heatsinkusa.com. The amplifiers use the 10.080 inch extrusion, which weighs roughly 1 pound per inch of length. For amplifiers up to 1kw, and for the 1.5kw VHF amplifiers, order a 6-inch length. For 1.5kw HF amplifiers like the HF2000, you will need a length of 10 inches...or you can use two of the 6-inch pieces. Use the drilling templates supplied with your amplifier kits as a guide to drill and tap.

Heat Sink USA can also provide machining services at a nominal cost to fly-cut the top surface of the heat sink for flatness.