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Author Topic: Frequency jump Collins s-line  (Read 653 times)
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KB5MD
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« 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?
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WA5VGO
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« Reply #1 on: November 24, 2023, 05:55:12 PM »

Roy,

Try measuring the BFO crystal frequency in the receiver and the carrier oscillator crystal frequency in the transmitter. My guess is they arenít the same. I suspect one or both of the crystal frequencies has drifted.
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