Actually Eddie I only had a goose feather quill to write with...lol

ON a more serious note.

First transistor amp build try not working. How the Ruby Works ( schematic at Rob Robinette.com)

I know next to nothing about solid state. Trying to trouble shoot.

I injected a 1000Hz signal at 250mv. Have correct wave form at gate. Have 9 volts at drain. No signal at source of of j201 JFET. 4K resister to ground from source verified. Schematic calls for 3.9K but I did not have one. I assume 4K will work. There may be other issues but I assume I have to solve the JFET buffer issue first.

The amp produces noise and popping/motor boating and noise is increased with increase of gain and volume control so I assume the LM386 is at least producing some amplification.

I ASSUME JFET is bad. Am I correct n this assumption?

Thanks,

Billy

Sorry to have to ask such basic questions...this solid state is a new world for me.

New location, new environment, new music coming soon

Seize the moo-ment
If you feel like you’ve herd all these cow puns before, you probably have deja-moo