AA Electronics PCB Group

After many personal delays, I finally finished the Dumble 102 build! Excellent board and great experience. To those who have built it or heard one: is the drive channel meant to be so... different? The distortion sounds super compressed, bright, and fizzy. It's way hotter than expected, but it's very much unlike a cranked Fender or a lower-gain Marshall. A category of its own. A little splatty, a little velcro-y. I realize this is stupid buzzword Bingo.

The clean channel is amazing and to die for. I'm just curious if something may be wrong with the drive.

Thanks!

Hi guys, Andrea here!

I'm finally excited to share with you that the PCB for the Mesa MK2C is ALMOST completed. We're almost ready for a first production batch!

If someone has experience with this type of amp, I would love a second pair of eyes. Happy to offer a free board/discount for anyone willing to help ;) Let me know below the post

Cheers

Andrea Founder - AA Electronics

Hey everyone! Getting stuck on my SLO 100 build. Any help would be greatly appreciated, so thanks in advance!

I believe that the problem is between the Input Jack and the Return Jack, but I can't figure out where.

Symptoms: When instrument cable is plugged into the Input jack, no audio passes. There is a noise floor hum. All LEDs illuminate as intended. After a few moments, my current limiter gradually increases in brightness until it glows brightly (and remains bright). As the bulb reaches full brightness, the indicator LEDs for channel selection start to dim.

When I plug the instrument cable into the Return jack, the amp passes signal. The audio is full and works on both channels. Interestingly, the channel LEDs pulse in brightness slightly when audio signal is applied - there is a direct link with applied audio signal and the LED brightness.

I've pulled V1, V2,…

Hey guys! New forum - I assume this is still the place to ask for tech advice!

I'm almost through the Dumble #102 build, and I'm using a Fender Twin power transformer that doesn't have the 6v Aux Tap for the relay circuit.

Would it be safe to pigtail/tap off the 6.3 heater voltage?

Thanks in advance!