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Tram D201 v302b pin 6 high voltage
- Thread starter klj2497
- Start date
V302 pin 6 is the "Manual" oscillator, the VFO. That section of that tube is active on AM and SSB equally.
Might check pin 1 of V302. This is the AM-only second mixer circuit. If R310 takes a hike, you'll get a low reading. The 130-Volt marking next on the schematic for pin 1 is still subject to plus/minus 15 percent or so.
Loss of AM receive only would point to V301, the AM-only crystal oscillator that feeds 5.8015 MHz into the other section of V302. A radio with extremely high mileage will wear out the 5.8015 crystal. Fortunately Barkett has that one.
73
Might check pin 1 of V302. This is the AM-only second mixer circuit. If R310 takes a hike, you'll get a low reading. The 130-Volt marking next on the schematic for pin 1 is still subject to plus/minus 15 percent or so.
Loss of AM receive only would point to V301, the AM-only crystal oscillator that feeds 5.8015 MHz into the other section of V302. A radio with extremely high mileage will wear out the 5.8015 crystal. Fortunately Barkett has that one.
73
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