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Purpose of white LED lights inside Wolcott amp.

I have a Wolcott P-120S amp.
While rolling some input tubes I have discovered two white LED lights just inside the tube cage at the front of the amp (left & right channel).
One is now on the other is not.
What is the purpose of these lights,
are they indicator or cosmetic lights?
There is no info in the manual.
Many thanks,
GJI
128x128gji

Showing 4 responses by gji

gji's avatar
gji OP
9 posts
 
Imhififan,
You were right.
gji's avatar
gji OP
9 posts
 
Hello Rleff,
Thanks, it is a nice amp.
gji's avatar
gji OP
9 posts
 
Gentlemen,
Thanks again for your ideas and input.
I have heard back from Pat McGuire at Wolcott and the riddle is solved.
As is turns out, when I had sent this amp in for a check up a couple of years ago he custom installed the LEDs as servo circuit "out of balance" indicators for my 6922 input tubes. There are two input tubes per channel. After instaling a couple of different input tubes the lamp in now off and the the amp (and the Quad ESL 989s) are 100%. Turns out he personally built this amp and it is one of five.
Wolcott kept three. Henery Wolcott (rest his soul) used two for reference amps. Pat uses one. A well known audio reviewer bought one after reviewing it, I have number five. The Wolcott P-120S is rated at 125 watts per side powered by 8 EL-34s. Self biasing with unlimited dampening. Power consumtion is only 100 watts, so low heat emitting (for a tube amp) and all in one tidy 70lb stereo amp.
Wolcott and Pat McGuire are still one hell of a electronics company.
Hard to find a Wolcott on the used market. All I can say is I'll never part with mine.

gji's avatar
gji OP
9 posts
 
Gentlemen,
Thank you for you input.
The lamp came on after I changed the input tubes on that side.
The Wolcott P-120S is a self biasing amp,
so tube bias is something I would not think comes into play.
Also, I do not see an adjustment screw by these lights, only a mounting bar.
What Wocott model do you have?
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