At 1/1/2007 19:25, you wrote: >My first attempt, since I had the vhf/uhf radio on the bench already, I >put the xtal in the 144.810 rx side of the radio, it did not work, I would >have thought it should have at least received, even though I would have to >retune the radio. I put a second xtal in, and got the same >results. Until I was certain these xtals were bad, I put this unit aside >and took one of the UHF receivers, (these are being used for voter >receivers) and began to tune it up, based on the sugesstions of all those >whom were helping. I was pulling hairs out getting nowhere. I put this >one aside, went back to the crossband unit, and began the retune and they >came into place. This is what makes me believe that the uhf receiver that >I have will not handle the high side cut.
If it's an "88" band radio (450-470 MHz) & your target RX freq. is in the 434 MHz range, high-side LO will definitely work. In fact, I would think that low-side LO would be problematic unless the LO helicals were modified. OTOH if this is a 406-420 RX then high-side LO may not work. Bob NO6B
