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
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
600w+ 33cm 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

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Transverter Selector

This switch box was built to allow the use of 2 different radios to be used with 3 different transverters.

Click any thumbnail for an enlarged picture.

front_panel.jpg (49597 bytes)rear_panel.jpg (60047 bytes)inside.jpg (114397 bytes)lettering.jpg (13075 bytes)xsw.jpg (51314 bytes)

The transceiver switch (s1) selects the radio, and switches RF, key line, and ALC feedback. The two radios it was designed for are the Yaesu FT-817 and Flex 6500.

The transverter switch (s2) selects which transverter the selected radio is passed to; and the RF and key lines are the connections that are switched. The pictures above were taken of an earlier model; the schematic is of the box currently in use.

In my station, 10 mw is the power level required for the transverters, and all of them have common tx/rx I.F. ports. One of the radio inputs has a 14db attenuator in line, making it suitable for 1w drive level; the other radio input is unattenuated, and that one is used with the Flex SDR.

I built this into a plastic enclosure, and used single-sided PC board as a liner for easy soldering, good grounding and proper shielding. Coax lines are RG-174 (not much is critical at 28 Mhz, my usual IF frequency for transverters). The front panel lettering was made with a full sheet inkjet label, and cut to fit the front and rear panels. The PowerPoint file used to create it is included here as well.