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
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

Comments? email to

MIcrowave Marker

Adding a small MMIC multiplier board into the enclosure of the VHF OXCO made a great signal marker for the microwave bands.

This one uses a spare crystal I had at 96 MHz, and provides strong, stable marker signals for the 2304, 3456, 5760 and 10,368 MHz bands.

If one were to use a 144 MHz crystal, markers would also be available for 144, 432, and 1296 MHz.

Hearing the signal only requires attaching a small "antenna" to the output (in my case, an inch of bare wire).


I used a small universal MMIC amplifier board to generate the harmonics. The actual device used was a MAR-3 equivalent, chosen for it's ability to generate lots of harmonics (without going bananas) when overdriven with 10 mw from the OCXO.


The multiplier board was spot-soldered to one of the walls of the OCXO enclosure, and the output coax re-routed to it. Of course, the OCXO output was routed to the amplifier input, and D.C. power obtained from a spare 8v pad on the other side of the OCXO board.