- 2025
- Oct
- 13
The Heathkit AG-7 Audio Generator part 8: Finishing up and final checks.
The last thing to do with the Heathkit AG-7 on the bench is make the power supply connections. Since I didn’t want to put any components on the filter capacitor cans, the parts that would have ridden there are now on terminal strips and need to be run to their respective terminations with wire. That just involved some…well…wire.
There’s a little bit of wire sticking out there that I need to remove - it was originally a run that got deleted by the parts being moved. For now, it just hangs in the air. That’s all of the connections, so on to the check.
During checking, I found three errors.
2 of those errors were simply no-solders where I had unsoldered a terminal to remove something and didn’t hit it again later. These were both lugs that had components that were moved, so I just never went back to them.
The big error was that I made an assumption. On the Hi/Lo switch, there are a number of connections. The schematic shows this connection as a picture, and I dutifully wired the switch according to the picture. Well…the picture showed certain connections at the top, and with the chassis flipped over I wired it just like that. Turns out the top of the switch is actually…the top when it’s sitting upright when you’d use it during operation. That was an easy fix, a couple of connections and a gold star with derp on it for me.
Nothing else was amiss, the schematic now matched what was in the unit. Time for the smoke test.
No smoke, and I have a signal on the scope!
The signal is clean, so the oscillator is driving itself at the proper rate. That’s what I wanted to see!
Next up is final adjustments, final thoughts, and a bit of an interesting find. Stay tuned!
Next part of this series: Coming soon.
Previous part of this series: https://wereboar.com … -part-7-the-rebuild/