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jury rigged vhf receiver
On Jan 24, 10:03*am, sorry-spammers ""w9wi\"@(sorry-spammers)"
wrote: JIMMIE wrote: I was wanting to listen to VHF/UHF SSB. All of my present UHF/VHF radios are FM. I was thinking of rigging up a simple downconverter using a mini circuit mixer and my HP signal generator as the local oscilator that I can connect in front of my HF rig. I have an antenna mounted pre- amp that I think should suffice for my front end. Any foreseeable problems short of keying my transmitter while it is connected. Just as an experiment, I once used the mixer & LO in one of my FM rigs. *Just tapped the output of the mixer just before the IF filter, ran it through a DC-blocking capacitor out to the antenna input of a general-coverage HF receiver. *Tuned the HF rig to 10.7MHz - sure enough, there were the 2m SSB (and CW) signals. *Worked pretty well. It was pretty cumbersome to tune though. *Luckily, almost everyone around here is within 5KHz of 144.200... Didn't take long to get the urge to transmit, at which point I wimped out & bought a multimode rig... -- Doug Smith W9WI Pleasant View, TN *EM66 Thats a thought, I might do that with an old mobile unit I have in the junk box. I think it will rx but the tx is dead. See if I can pick the signal off right after the first mixer. Jimmiej |
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