The other bench

kopcicle

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bench.jpeg
 
Bottom picture, far right unit - Collins?

Design is very similar to the old R390 receivers I worked on in the Navy. They were made by Collins.
 
Yes Sir look at that
Perhaps this is the connection i need and been looking
for.
I have two old Luxman HiFi amplifiers . That are defect.
L-400
L-210
Very good sound so repair would be nice
I get sound but not clear or high so i cannot measure and find a cut in signal or broken component
I have schematic but as it seems a fault changes values upstream
As well as Downstream since it is not DC
To Put it plain and simple it is too difficult for me.
Apologize if this is off topic but ...
The setup can give indication of a senior experienced professional that been repairing these fault most of the life.
Perhaps knows the answer directly .As experienced people not seldom do with old bikes
 
So once again I prevail on the varied talents of the subversive membership of this ship of fools and savants.

hydroxylammonium nitrate, Ni 3 OHNO 3

I'm a little over my pay grade here and need an Elmer.
I'll fidget a bit and reason what I can of it .
I have been the exception to the thought that you can't teach an old dog new tricks. This trick will just take longer.

PM if you get the drift immediately and at least think you know me that well.

If not , consider it a puzzle and continue here.

We live in interesting times
 
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