Tube Amp Archive

I have replaced the screen-grid resistors where one of them was visibly fried. I have also replaced the fuse. Powered-on the amp and nothing! even hiss :( The lamp is also not lit. Should I start troubleshooting from the PT to make sure we have power throughout the circuit? And could the short in th...

Hi, I have ordered 1 Watt 470 resistor from Mojotone for my screen-grid, and here is the resistor I have received (in blue). It is smaller in size compared to the original (gray). Are those wrong wattage? May I used them safely or re-order correct ones? I really do have trouble finding them online.....

Dear Forum, I understand my above plan is so silly that I could not get any feedback. Considering that I live continents away from US and not having much amp experts around I rely on the information/guidance and advices from you during this task. Thank you very much for the time you spend on this th...

Dear Forum, As you know I had my scree-grid resistors burnt leaving a carbonized spot on its PCB in my 59 Bassman Reissue LTD. I will be travelling to US soon; and if you encourage me it seems I am pretty convinced to go for a complete overhaul to take it to vintage specs. If you also agree, I would...

Thank you very much for the assistance and advise, Randall, Milkmansound and Billyz... I am confident with my basic amp knowledge and craftsmanship; I can do a tag-board build for this one but that would cost to forum time to answer hundreds of questions. Another limitation is the fact that I am loc...

Hi, You may find attached the images of the amp, board and valves I took out. I have cleaned the circuit board surface with isoprophanol, but the remaining black spot is the board roasted - the spot will stay. I hope it didn't harmed the board and I can still use it. In the worst case I can replace ...

Dear Forum, I am a guitar player from Istanbul, Turkey and I am just registered to the forum in search of advice/recommendations of you knowledgeable and experience members. I would appreciate your time if you could assist me solving my problem - since I am far away from skilled amp builders and par...