Rockola 1422 O-Amp problem
 

I have recapped my O amp on my 1422.
The 5U4 tube has a lot of sparking inside the tube.
I have tried other 5U4's, and the same thing happens, even without the other tubes, and no input/output plugs (I jumped the ac on the speaker receptacle.)

I have tried double and triple checking, but I cannot find a problem.

Does anyone have any suggestions on where to look?

Thanks

Rockola 1422 O-Amp problem
 

On 2017/08/13 11:14 AM, ILikeValves wrote:
I have recapped my O amp on my 1422.
The 5U4 tube has a lot of sparking inside the tube.
I have tried other 5U4's, and the same thing happens, even without the other tubes, and no input/output plugs (I jumped the ac on the speaker receptacle.)

I have tried double and triple checking, but I cannot find a problem.

Does anyone have any suggestions on where to look?

Thanks


Short on output of 5U4 filament output B+ load - a bad cap, etc. You
will destroy the transformer if you do not find the problem!

John :-#(#

--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd.
MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."

Rockola 1422 O-Amp problem
 

On Sunday, August 13, 2017 at 11:14:38 AM UTC-7, ILikeValves wrote:
I have recapped my O amp on my 1422.
The 5U4 tube has a lot of sparking inside the tube.
I have tried other 5U4's, and the same thing happens, even without the other tubes, and no input/output plugs (I jumped the ac on the speaker receptacle.)

I have tried double and triple checking, but I cannot find a problem.

Does anyone have any suggestions on where to look?

Thanks


Will Look at that, and prob start to disconnect leads. Tnx