60s Transceiver. Part 8.
Here's the A4-1 unit. The schematics shown in the video are not final. The unit is stable in operation, and there is no oscillation. Of course, a lot of time was spent on various experiments. The unit was loaded with a 75-ohm resistor during measurements. Since the KT606A has slightly lower gain, I settled on the KT610. When applying +15 volts to the amplifier, the RF output was -50 volts; when removing +15 volts, the RF output was 15 volts. I'll draw the finished and final schematics for myself later. Right now, these are just rough drafts, but they are already final.