Prototype(?) Peak T-001 tuner help needed. - diyAudio
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Old 19th May 2016, 03:51 AM   #1
HyKlas is offline HyKlas  United States
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Location: Southern California
Default Prototype(?) Peak T-001 tuner help needed.

I snagged this Chinese tube tuner from a thrift and need a little help with the circuit.

The pair of burnt resistors shown below are where my concern lies. The board says 150/5W but those are obviously a pair of 330Ω units. Taking a peek at the underside shows signs of what seems to be an attempt at tweaking that resistance from it's stated value. Obviously the caps in that part of the circuit took a hit as well.

I guess what I'm after here is a little hand-holding on where to take this thing. I'd like to get it going again seeing there may or may not be another one in existence.

If you need any more info, let me know. I'm not the sharpest tool when it comes to circuits but I do know where to find the hot end of a soldering iron.

For reference, this board uses a pair of Chinese 6N6 tubes.

Not sure how to post photos but here's some links to dropbox.

Last edited by HyKlas; 19th May 2016 at 05:38 PM.
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Old 19th May 2016, 06:09 AM   #2
Mooly is offline Mooly  United Kingdom
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Moved to Analogue Source.
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Old 19th May 2016, 05:37 PM   #3
HyKlas is offline HyKlas  United States
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Originally Posted by Mooly View Post

Moved to Analogue Source.
Thanks much!
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Old 21st May 2016, 05:43 PM   #4
HyKlas is offline HyKlas  United States
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No ideas on what wattage those resistors are? They're about half the size of the 150Ω 5W I got to replace them.

The pads were no good so I had to solder in some jumpers. Replaced all the caps with a lot higher quality units as well, mostly Panasonic 105C and Silmic IIs... Transistors in the area tested ok but new parts went in anyhow.

Guess we'll just bring it up and see what happens.
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