Tube Amp Archive

Is there a place to find good but fairly inexpensive power and output transformers? I know Mercury comes highly recommended but I don't really have the budget for those.

martin manning wrote: ↑Sun Nov 05, 2023 3:40 pm Why don't you pull two of the output tubes and measure the heater voltage?

Thanks Martin I will do that.

In all likelihood the reduction in heater load of 1.8 amps will take the Heater voltage above 6.9 volts, but you can just leave all 4 output tubes in the amp, but only have two of them wired up to the B+ on pins 3 and 4 . Would there be a way to reduce the heater load if the extra tubes are removed...

I need some technical help with a mod. I want to replace my fender twin 100 watt output transformer with a 40-50 watt OT - like in a bassman or something like that. Would I have to change my Power Transformer or would it still work with a lower wattage OT?

sluckey wrote: ↑Sat Apr 01, 2023 1:25 pm Wire it the same as your ceriatone PT.

OK so one lead goes to ground then. Thanks!

Newbie technical question. I'm replacing the power transformer in my Ceriatone OTS 50 with a Mercury Magnetics CER-OTS550-P and don't know what to do with wiring the 60V bias supply. There are two gray leads. I don't know whether to float one end or ground it and don't want to blow anything up. I at...

Here is a good general guide to soldering: https://www.techspray.com/ultimate-guide-to-electronic-soldering 600-650F is recommended for Pb-Sn solder and 650-700F for lead free. You can read about the pros and cons. I use Pb-Sn solder and generally have my solder station set close to 700F, and I can...

Newbie question here. I've always just used a good wattage soldering iron for projects but my last one took a nose dive so it was time to replace it. From everything I was reading about it I just got my first digital temperature controlled soldering station - a Hakko FX888D. I am wondering what reco...