White bucks or white socksM Fowler wrote: ...nice foot shoot huh...
Two Express Transformer Questions
Moderators: pompeiisneaks, Colossal
Re: Two Express Transformer Questions
Tim
In case the NSA is listening, KMA!
In case the NSA is listening, KMA!
Re: Two Express Transformer Questions
That is nice foot shot 
No turkey shoot this week sorry.
No turkey shoot this week sorry.
Re: Two Express Transformer Questions
Switched the PT around, installed the OT, tried to keep things pretty clean. Oddly enough, the input jack AND volume pot decided to go at the same time. I replaced the jack, I don't have a replacement pot on hand. (I knew the jack was going, I don't know what the deal is with the pot.)
The pot is giving me outrageously loud hum up to 9 o'clock, then it works normally. I'm getting different hum than before, but other than the volume pot problem, it's less than before, and it moved from the power section to V1. Except for the part failures, I consider it a positive step.
The pot is giving me outrageously loud hum up to 9 o'clock, then it works normally. I'm getting different hum than before, but other than the volume pot problem, it's less than before, and it moved from the power section to V1. Except for the part failures, I consider it a positive step.
Re: Two Express Transformer Questions
I replaced the shielded wire Ceriatone had in there; bad shielded wire? Replaced the jack too no more problems after that.
Are you using a shielded wire from V1 to center of pot? Reflow connections.
Are you using a shielded wire from V1 to center of pot? Reflow connections.
Re: Two Express Transformer Questions
That's a no no in my book. De-solder, then re-solder.M Fowler wrote: Reflow connections.
Eardrums!!! We don't need no stinkin' eardrums!
Re: Two Express Transformer Questions
I have been thinking about replacing the ceriatone shielded wire--it's junk. I do have shielded wire running from the Vol to V1.
The jack is straight up mechanical failure--I think there is a good chance my toddler plugged a cord into it and pulled it really hard. Just a guess, but pretty likely. I replaced that with a metal jack. The jack, not the toddler.
The pot I think is bad, too, I rewired the bright switch and I felt some weird movement in lug 3 (or is it 1?). I'd be surprised if I overheated it, but who knows. I don't have a replacement pot right now, but I will be in SLC over the weekend and am going to try to hit Ra Elco. If anyone knows a good elec supply place in Vegas, I would love to know about it.
I figure I'll replace the pot before I do anything else, then see what I've got.
The jack is straight up mechanical failure--I think there is a good chance my toddler plugged a cord into it and pulled it really hard. Just a guess, but pretty likely. I replaced that with a metal jack. The jack, not the toddler.
The pot I think is bad, too, I rewired the bright switch and I felt some weird movement in lug 3 (or is it 1?). I'd be surprised if I overheated it, but who knows. I don't have a replacement pot right now, but I will be in SLC over the weekend and am going to try to hit Ra Elco. If anyone knows a good elec supply place in Vegas, I would love to know about it.
I figure I'll replace the pot before I do anything else, then see what I've got.
Re: Two Express Transformer Questions
Wasn't there a thread that explained how to position an OT by listening with a pair of headphones for the least amount of hum?
Lee
Re: Two Express Transformer Questions
I know I mentioned it in this thread:reo61068 wrote:Wasn't there a thread that explained how to position an OT by listening with a pair of headphones for the least amount of hum?
http://ampgarage.com/forum/viewtopic.php?t=8651
but I'm sure it's been discussed elsewhere here too.
Re: Two Express Transformer Questions
Boy, was this true!Structo wrote: If you get them backwards you will get positive feedback and the amp will howl.
