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Carrier Null Adjustment on Icom IC-251A???
I have an Icom 251A 2M all mode rig. I did a mod today to cut back the
power to about 100 mW when I have a transverter connected to it. When keying up in SSB mode with no audio applied, I get approximately 10 mW of carrier. I want to null this out to an absolute minimum. I see IC4 on the main board is the balanced modulator. My guess is R270 on the main board. Can anyone with a service manual confirm this? Thanks! Scott N0EDV |
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