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Title: Frequency jump Collins s-line Post by: KB5MD on November 21, 2023, 09:21:07 PM I have a Collins 75S-3b receiver operating transceiver with a 32s-3 transmitter. The transmitt frequency is off by 1 kHz from the receive frequency vfo setting, not the same as it should be. I have aligned the receiver vfo and the bfo, but to no success. Any ideas?
Title: Re: Frequency jump Collins s-line Post by: WA5VGO on November 24, 2023, 05:55:12 PM Roy, AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
Try measuring the BFO crystal frequency in the receiver and the carrier oscillator crystal frequency in the transmitter. My guess is they aren’t the same. I suspect one or both of the crystal frequencies has drifted. |