03-13-2009, 08:37 PM
Ed
If you use a diode as your 2nd detector, you need to do something with that tube that served as a "power detector." In my mod, I converted it to an audio amplifier, same circuit as used in the 2nd version 70. This drives the 47 audio output.
You could easily add AVC to the IF stage in my mod; in fact I had AVC on the IF stage of mine at first. But being dissatisfied with its overall performance, I changed it so the IF amplifier is running "wide open"; AVC is fed only to the RF amp in the schematic.
If you use a diode as your 2nd detector, you need to do something with that tube that served as a "power detector." In my mod, I converted it to an audio amplifier, same circuit as used in the 2nd version 70. This drives the 47 audio output.
You could easily add AVC to the IF stage in my mod; in fact I had AVC on the IF stage of mine at first. But being dissatisfied with its overall performance, I changed it so the IF amplifier is running "wide open"; AVC is fed only to the RF amp in the schematic.
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Ron Ramirez
Ferdinand IN
