On Sun, 3 Aug 2008 13:26:42 +0100, tony sayer
wrote:

In article , Marky P
scribeth thus
On Sat, 02 Aug 2008 17:24:36 +0100, Eeyore
wrote:



Marky P wrote:

Hi,

I've been replacing all the caps

Coupling / decoupling ?

in my vintage Wurlitzer Jukebox amp.
The problem was one channel was buzzing quite badly. Now ive done it
all, the bad channel has stopped working altogether (only a slight
hum). I checked my wiring and noticed one of the caps I changed is
the wrong value (22uF instead of 150uF). This cap is in the faulty
channel. Does anyone know if it would make that much difference?

I think you need to stop messing around and consult a proper tech. I
doubt you have the skills to fault find.

Graham

You're right, I don't have the skills to find fault, which is why i'm
referring it to The Jukebox Hospital. But I do have basic soldering
skills, which is why I replaced all the electrolytic and paper caps.

Marky P.


Well unless its priceless bit of gear thats not a bad way to learn

1960's Wurlitzer amps are pretty priceless. Certainly not cheap to
replace or restore.

And I wish a few more people would try its worrying how many young
people these days can use a PC but not a soldering Iron;(...

Well, I'm very pleased with my soldering on the board, though my
modification of using seperate caps to replace the nulti-sections
looks a bit of a mess. I reckon the Jukebox Hospital won't be too
happy with my modifications :-( Anyway, the fault is most likely the
output tranformer in that one channel, which can be fixed but it ain't
cheap!

Marky P.