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RF Communications Equipment for Sale

PSK Demod

AYDIN PSK Demodulator

AYDIN model 322A PSK demodulator. Unit has a lot of RF filters, mixers, and amplifiers in it for those HF projects if you don't want the demod for its intended use.

RF Amp

Mini-Circuits ZHL-5W-1A

Mini-Circuits ZHL-5W-1A RF amp covers 5 MHz through 500 MHz with 40 dB of gain. It has a 4 dB noise figure, and can output 37 dBm of power at 1 dB compression. It has a quite respectable 47 dBm of OIP3. For power, it requires 24 VDC at 3.3 Amps.

I have these models with and without the necessary heatsink. For just $130 you can have as many of the non-heatsink amplifiers you could possibly use, or for $170 I'll drill and mount one-or-more on heatsinks. (plus the shipping of course)

These units are brand-new, unused, purchased from a government sale. Mini-Circuits gets $995 for one of these, and that is without the heatsink!

Spec sheet: ZHL-5W


DSI Model 7143 PSK/PCM Demod

DSI (Decom Systems Inc.) Model 7143 PSK / PCM Demod with a built-in bit sync. Start your own ground station with this beauty. Has tons of internal parts including a switching power supply with +5, +-12 VDC regulated outputs.

I'll sell this for only $26 plus shipping.

DSI Model 7700 Bit Sync

DSI 7700 PCM Bit Sync

One of the many bit syncs used in the Satellite Test Center (STC) before it was demolished. The bit rate may be set arbitrarily from Hz to MHz from the front panel or remotely via GPIB. This bit sync can lock to the newer weather satellite digital formats.

I can let this bit sync go for $56 plus the shipping.

250 Watt Dummy Load

Bird Termaline Model 8141

I have several of these dummy loads. One measures 57 Ohms and has a damaged but usable, N connector. This one with the damage is $20. Another measures 53 Ohms, no significant damage, but has been banged around quite a bit. I'll take $35 for that one. The rest measure 50 Ohms, are used, but in decent shape and are $65 plus the shipping.

I'm surprised that as of 2017 there has been zero interest in these perfectly good dummy loads. These handle 250 Watts continuously, and 500 Watts intermittently.

26 GHz Antenna 26 GHz Antenna 26 GHz Antenna 26 GHz Antenna 26 GHz Antenna 26 GHz Antenna

4 foot Dish antenna

This dish antenna with feed is about 4 feet in diameter. The feed is WR34 with a choke horn feed, and has a waveguide-to-SMA launcher at the bottom end. It was designed for backhaul communications at 26 GHz. I have two like this one shown, and another with side shields to suppress sidelobe radiation.

Scroll down in this sub-window to see additional views of this antenna.

The feed is a question mark from WR34 waveguide with a choke horn at the business end. The brazed-on tube at the end is a support which is clamped into the dish at the front surface of the dish by an X-crossmember.

I can let this amazing antenna go for $250. It would be difficult to ship, so local pickup in the San Francisco Bay area is preferred.

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