Bottlehead Forum
Bottlehead Kits => Stereomour II => Topic started by: duman on April 25, 2023, 10:37:27 AM
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Hi,
My Steremour II has been happily running for almost 3 years, including the last 6 months with the DC Filament Supply upgrade.
I just installed the Shunt Regulator upgrade and the voltage checks don't match the manual. In particular:
IA: fluctuates during measurement between 382-388 VDC
OA: fluctuates during measurement between 304-320 VDC
KregA: fluctuates during measurement between 368-373 VDC
IB: fluctuates during measurement between 385-387 VDC
OB: fluctuates during measurement between 140-205 VDC
KregB: fluctuates during measurement between 6.3-7.2 VDC
None of the LEDs on the big board are lit. On the small board, the B-side LEDs are lit and the A-side LEDs are flashing.
I've triple-checked the wiring and solder joints. Any thoughts appreciated!
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KregA: fluctuates during measurement between 368-373 VDC
That is a very improbable result. Can you take the board off and show some photos of the bottom and the 9 pin socket wiring under the board?
Also there's no need to bend the wires passing through the board, and doing that can make them very hard to remove.
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Thanks Paul, will do. And thanks also for the wiring tip!
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Here are pics of the underside of the board and the two small tube sockets. Thanks very much for any assistance!
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Leaded solder and a very hot iron are required to get good results with our kits.
https://www.youtube.com/watch?v=EN16Pi7pcfk (https://www.youtube.com/watch?v=EN16Pi7pcfk)
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Success!! I reflowed all the joints at a higher heat and am listening to sweet music once again.
IA: 376 VDC
OA: 297 VDC
KregA: 4.18 VDC
IB: 376 VDC
OB: 299 VDC
KregB: 4.75 VDC
Thank you Paul!