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https://amfone.net/Amforum/index.php?topic=25323.0
A 9v battery hooked up as a Negative Voltage into the ALC port on the back of the radio, through a potentiometer.
You forgot to ground the junction of R197 (10k) and D80 (Anode, or non-bar end). This turns the Mute function off when in TX. Can switch on and off this way.
The Lincoln II and other newer SSB radios (Madison, BC980SSB, others) use a
37 MHz PLL VCO range, (27 MHz + 10.695 MHz IF),
I believe the Galaxy FC-347, Ranger FC-390 are designed to "see" either
16 MHz PLL VCO (27 MHz - 10.695 MHz IF)
or possibly by soldering a jumper blob, "see"
34 MHz PLL...
About 45 years ago, I got my hands on a JIL SSB add-on radio element for a JIL stereo, never could find the matching radio for it. I think it had a 24 pin round mic plug, and mode and channel selection was in the mic.
Actually, not quite correct.
Both Finals are on at the same time, in Parallel with each other.
In SSB, the Power Regulator is hard clamped to feed 12v to the Collectors of the Driver and Finals. This gives the potential to be "modulated" in SSB to 30 or so watts Peak Envelope Power (PEP).
In...
Look at the schematic again.
The RF output transistors (Driver and Finals) are "slightly turn on" when transmitting, there is no difference between AM (slight delay) and SSB (longer delay) on this amplifier.
When no RF is sampled on the input (RTX), TR2 is "relaxed", thereby causing TR1 through...
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