The Amp Garage

They are a pretty good platform for a 5E5 circuit even using the existing transformers. It would have to use diodes for rectifiers unless you add a 5V transformer...

I thought about adding a trimmer, but elected to just make the bias adjustable. I can't get the damn thing to clean up for anything though. Bias is just below 60%, but the amp just sound dirty... driving me crazy! I'm wondering if I have a failing coupling cap that is causing this ugly distortion...

I'm thinking that the PT must have been replaced a very long time ago as the area where the center tap was soldered to the chassis looks to have been poorly done... in fact the center tap only had one strand of wire left and it was causing some very strange voltage readings... voltage lower than exp...

I have a AA165 or AB165 Bassman on the bench with an odd filament circuit that I've not seen before. The PT has not center tap on the filament circuit and there is no artificial center tap using 100K resistors either. Rather on V1 pin 4, there is a .05 600V capacitor going to ground. Though I plan t...

I've been using a Hakko 936 for about 10 years and have never even had to replace a heating element, though it has burned through several tips. I have been well satisfied with it. The newer model is butt ugly, but if it's anywhere as durable as the 936, it's a champ!

I think you guys hurt his feelings...

Some of you guys might be interested...

http://www.ebay.com/itm/Vintage-Ampeg-V ... 3cdfdfe86e

The main problem with most books about amp and building is the organization of the information and a lack of and index...

I agree with HeeBGB... Burgess ain't worth a fart in a whirlwind... a complete waste of oxygen.

Try here:

http://www.aikenamps.com/index.php/tech-info

The plural of chassis is chassis... the differentiation is in the way it is pronounced... chas-ee = singular, chas-eez = plural

I don't think this matters that much... I chose to use the bolt through the feet on my cab to attach the chassis to the cab as well...

I remember Glenn saying he had some Sylvanias in his Express, but I'm sure they were replacements...

The hiss is not unusual for an Express... it's a high gain amp. That being said, my Express clone doesn't hiss as much as my 1969 Marshall Super Lead when both are cranked...

I would have chased my tail a while with that!