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Schematic says D75 and D52 are both KB262, which is a dual series diode. Voltage drop through each should be about 1.4v. Are they both (D75+D52) gone? You could get away with either of them, and put a jumper in place of the missing one, then readjust VR3, the TX Freq Adj control. Could use 2 1N4148 diodes in series for each if both are missing.

[QUOTE="NZ8N, post: 788599, member: 51368"] Schematic says D75 and D52 are both KB262, which is a dual series diode. Voltage drop through each should be about 1.4v. Are they both (D75+D52) gone? You could get away with either of them, and put a jumper in place of the missing one, then readjust VR3, the TX Freq Adj control. Could use 2 1N4148 diodes in series for each if both are missing. [/QUOTE]

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