04-11-2014, 02:25 PM
Rich,
Yes, that is definitely progress.
If you still can't inject audio, you still have some issues on the audio section. Take a close look at the tone control. The 0.01 uF should always bypass to ground, and the 0.015 uF is a switchable bypass to ground. If the wiring is off, you may be grounding out your audio signal here.
This may be a stupid suggestion, but when you are trying to inject audio, what "modulation percentage" do you have dialed in on your signal generator?
One quirk of your signal generator is that the output power switches on the right only apply to RF output. The audio output power is controlled by "AF MOD/OUTPUT" control. Just for kicks, if you have a cheap AM radio laying around, try injecting some audio into the speaker and output transformer to make sure it is working the way you expect.
Roger
Yes, that is definitely progress.
If you still can't inject audio, you still have some issues on the audio section. Take a close look at the tone control. The 0.01 uF should always bypass to ground, and the 0.015 uF is a switchable bypass to ground. If the wiring is off, you may be grounding out your audio signal here.
This may be a stupid suggestion, but when you are trying to inject audio, what "modulation percentage" do you have dialed in on your signal generator?
One quirk of your signal generator is that the output power switches on the right only apply to RF output. The audio output power is controlled by "AF MOD/OUTPUT" control. Just for kicks, if you have a cheap AM radio laying around, try injecting some audio into the speaker and output transformer to make sure it is working the way you expect.
Roger
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