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T-4XB No carrier oscillator
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I've taken V1 half-apart and metered out components.? All I've found is the 220k resistor being slightly out of tolerance.? Capacitors within tolerance.? C2 value is good and changes as I turn it.? Pins 2 & 3 have different voltages compared with a good transmitter or the chart.? I've changed the crystal.? Crystals test good on my homebrew crystal tester.? Tube has been changed.? S1 appears to be working. Pulling my hair out here.? Anyone see anything I may have overlooked?? This is a simple circuit that's a bear to get at! 73, Steve Wedge, W1ES/4 Time flies like an arrow.? Fruit flies like a banana.
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On Apr 18, 2024, at 4:34?PM, Steve Wedge, W1ES/4 via groups.io <w1es@...> wrote:
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On 2024-04-18 14:34, Steve Wedge, W1ES/4 via groups.io wrote:
Pulling my hair out here. Anyone see anything I may have overlooked?*** That reminds me of a deal I got on a Galaxy V transceiver. It was absolutely mint condition. The flea market vendor said that he had removed the packing tape from the tubes. Lacking a power supply, I rewound a big low-voltage transformer. Got the rig up & running, but the carrier oscillator would not adjust to frequency. Apparently, the crystal had aged. And it was really buried in a little tiny compartment that was hard to get to. I gave up and sold it at a later flea market. - Jerry, KF6VB |
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