AA Electronics PCB Group

Hey Guys!

Creating another post since it seems like the forum has been more active. I have a dead SLO 100 on my bench that has been languishing for over a year. Here's what is going on:

Amp powers up, relays work, all tubes glow and get expected voltage. Bias circuit works. After some time (approximately 30 seconds to one minute), the current limiter bulb slowly grows in brightness until it is BRIGHT, and at the same time, the indicator LEDs for the amp's channels dim.

I'm using the recommended power transformer. This problem only happens when the power tubes are installed, and I've checked the power tube pins and circuit a million times.

Any help would be wildly appreciated. Dr. Andrea? Thanks!

I’m wishing to build a vintage style AC 30 however I don’t have much faith in the vintage layout. Can the fox 30 board be fitted to vintage chassis and built up?

The idea being to build a studio quiet AC-30.

Thanks for your assistance

Regards

Mark

I was under the impression that the #183 ODS board configuration was kinda plug and play only to find out if you don't have a specific tap on your power transformer you have to use different 5V relays and not BOM specified 12V.

or add an additional 12v power source? Sorry for the rant,but did notice people with a small transformer in their build images,now I know why....no mention of it on the layout. I am really green at this so maybe it's just me and I can't see it on the schematic? I'll keep searching for answers....

Hi all,

Hope everyone is well.

I am currently building the ODS 3rd gen. I the bom it specifies a fender twin PT (022756) Hammond make an exact replacement model no 290fex. My issue is the schematic and the layout call for a 3.15v tap from the transformer but, the required PT doesn't have it. Am I missing something here? Is there supposed to be a way to connect the heater wires even without the 3.15v tap?

Any help would be greatly appreciated.

Thanks