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I’d suggest that if your voltage fluctuation is 100-130 volts, you remove the cover from the main panel and check the feed from the meter. Fluctuation is common but being as high as 130 would suggest you’re close to a substation and low as 100 far away. It’s not common to have that much voltage...

Check them both. The T2A is a slow blow 2 amp AGC fuse 1/4 x 1 1/4 inch. It’s for the 240 volt mains. The T1A is a slow blow 1 amp same type fuse for the high voltage.

It sounds like he’s through with it and returned it. I also think that was a mistake without properly biasing the amp with a current measurement but it was apparent that wasn’t happening.

I didn’t mean I’d rewind it for them. They can buy a replacement for half what I charge for winding it. I want the lamination steel and I also want to properly condemn it as shorted windings before any dissection would occur. He appears to lack the interest testing it properly and maybe doesn’t...

Pretty certain they are film. The mustard caps are and I’d think the grey molded ones are too.

When or if you replace the transformer, message me. I’ll send you the shipping information and a label for you to ship me that “bad” transformer. Worse case scenario, I’ll strip it down and rewind it.

If the amp has no conditions of degraded capacitors, it’s hard to say for sure if replacement will give you any benefit. Different brand capacitors will give different results. I use F&T capacitors for most of my amps. I use Sprague Atom for Fender usually and Trainwreck stuff exclusively...

Glad you got it figured out. I forgot you were good without the tubes in and shorted with tubes. I’m getting together a 5E3 build now. I just tested my transformers (Heyboer). I’m modifying it with a long tailed pair phase inverter vs the stock cathodyne just to see what it’s like. I’ll post...

Remove the capacitor between the 4.7k and the 22k. Problem found. The capacitor must be defective.

Measure the voltage drop across the 4.7k resistor! If it’s the total voltage, meaning you have 0 volts on one end of the resistor, the short is between the 4.7 k and the 22k.

The high voltage at the first filter capacitor.

That’s with the tubes in place? At 103 volts, it’s dropping about 17 volts on the bulb. A 60 watt bulb. It’s about 15% bulb or 9 watts. I don’t think you have a serious problem. It’s not a dead short by any means. You need to measure the voltage drop across the 4.7k resistor. You also need to...

What is the mains voltage that you measure in the amp at the power switch? With the current limiter in place it’s going to be lower than 120 volts because there’s a voltage drop across the bulb filament. What voltage is at the power switch?

I’m about to build a 5e3 type amp. Everything about it will be 5e3 but I’m going to loose the cathodyne phase inverter and use a long tailed pair.

Lit bright?

You’re going to enjoy it.

With the guitar plugged in or without anything plugged in? Which channel if plugged in?

It’s cool what you’re doing. After thinking just a little bit, your offerings are for Marshall amps and $85 is more than fair for an unobtainable original panel. Nice work.

I’m referring to the plastic plexi panels and they can and are reverse engraved with a laser.

Not to be critical or rude in any way. Valvestorm sells their JMP panel for $40, what makes yours better? I know your expenses and time are valuable, I’m always surprised when I quote a build and the inquiry is surprised about the total cost and seems to want a much lower price. I usually...