Tube Amp Archive

Amp is fixed !! You guy's are amazing ! Phase inverter tube was dead ! One of the input leg or spring wasn't closing and caused a bad ground or something! Japanee to me but you guy's know what I mean. A few bad cold solder With the green ground that was unconnected, that was enough to make the amp s...

open filament would do that. that's what I thonk. Ooops!!!! He thonks something's wring !!! Better with he think's something's wrong ! So . . . have we had a look at that phase inverter tube in the dark yet, see if both filaments are lit? Drop an amp, bust a filament, who'd a thunk it? Or perhaps a...

Leo_Gnardo wrote:

louiss wrote:pin 6
reads 330 so he thonks somethings wring
in that area.

open filament would do that. that's what I thonk.

Ooops!!!!

He thonks something's wring !!!

Better with he think's something's wrong !

Just came back from my friend to get the amp to bring it on monday at the tech's place and he found that the green wire ground was loose so now the amp is a lot better but still has a weird sound , he said the phase inverter V3 on pin 1 reads 120 and is suppose to be 225 and pin 6 reads 330 so he th...

Thank's again !

I found a good tech with a scope
near me so I should be able to drop
the amp on monday so I'll keep posted
on what the problem is or was !

Louis

Again , thank's everyone ! .... I know it's not easy
not having the amp on your bench but I'm sure
that it will help !

I will try to post gut shots but this is
what this amp sounds like when healthy.

http://m.youtube.com/watch?v=rzBxYtUqhD8


Louis

Thank's !

I know that my friend is not a professionnal
technicien or electronic engineer but he will do is best,
so that's why i'm here to ask
if the sound the amp makes is something
one of you have heard before .

Louis

Hi everyone !......my first post, Here I need your tech ears ' this is a well knowned beautiful Plexi like amp dropped by Fedex when it was shipped from the builder's place after full check up and update. Now the amp is at my friends who his also an amp builder but is trying hard to find whats going...