Tube Amp Archive

If you unsolder the 6.3volt leads and have all the tubes out,than install a 1/4 amp fast blow fuse , that fuse should not blow if you power up the amp, if it does the power transformer is bad, but you still may have a shorted out 6v6 that started the whole mess! i've done it and the fuse went bad.s...

yeah, i got this, but where exactly do i put this?

Find a 1 amp circuit breaker and solder on some clip leads to clip across the fuse socket so you don't keep wasting fuses.

Can you explain it a little further, please? English is not my language and i admit i understand nothing of this, sorry!

thank you very much guys!!i checked the heater wiring in the sockets and everything is fine. The two green wires coming out the PT have zero resistance.i'm doing the 2nd step tomorrow,cos i don't have such fuses right now and i'll post the results.Thank you very much again

AC voltage should be a little on the high side because there is no load. so,how much is this "little" i checked with and without tubes and the resistance is to infinity,except for pins that are connected to the ground or a cap etc.filaments to ground resistance is infinite.However, at V1 and V2 the...

So, I did as you said and initially the fuse went blown in a sec. Then i unsoldered the fils and the amp powered on "normally". I measured 125vac in both pins. What does this mean? thank you again!

Phil, just a last question before i check.do you mean to unsolder the OT center tap or the PT one that is grounded?sorry for asking maybe silly question, i've never done such troubleshooting again

the amp was running smoothly for something less than a year.ok, i'll do this and i'll post here,thank you!

thank you martin!!

thank you both for your replies.i'm using 6v6s and a 2A fuse.it's a weber kit. I've checked with new fuses and still it blows them instantly. i've also checked with the tubes pulled off,still the same.i've checked the wiring for incontinuity and it seems fine.so, maybe a silly and moron question,sor...

Hi, I'm about to change a PT in my 5e3, because of a blown one. So, before i put in the new one, i'd like to ask if it is anything that can cause a blown pt, so i could check it in my amp.thank you!

the line voltage here is meant to be 230v +-5...
when i was building my 5e3, i asked a technician and he told me to connect the 240v line of the PT. Was he right? Every other device i have in my house is 100-240v...

https://taweber.powweb.com/store/025130eusch.jpg http://www.hammondmfg.com/pdf/EDB291AEX.pdf http://www.hammondmfg.com/pdf/EDB291BEX.pdf My PT is the first one, an i see the voltages are different in all 3 PTs. As i'm not a specialist, i don't know if i can replace the first with the other, can i? A...

so, let's say both fit.which one would you choose?do i have to look for something specific in their specs?as both fit.
thank you very much

According to Hammond AEX is a PT for tweed deluxe, not BEX. Do you think I should put on a bigger one?