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#12
April 19th 07, 02:56 PM
posted to rec.radio.amateur.boatanchors
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DX-40
Roger D Johnson wrote:
While we are on the subject of DX-40s, I have one with a problem that's driving me nuts. In AM mode, just sitting at idle, the plate current pulses up about every second or so. The scope shows a pulse on the plate of the second 12AX7 audio stage. It's acting like some sort of relaxation oscillator. I've rebuilt the audio section to no avail. Anyone have an idea what the heck is going on? Have you tried replacing the 12AX7? -Chuck |
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