Bottlehead Forum
Bottlehead Kits => Stereomour II => Topic started by: cnledesma17 on January 01, 2024, 02:30:21 PM
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Hello,
I recently completed my Stereomour II Kit, and while performing the final voltage check, I noticed that the T7 and T14 DCV were both reading ~110 VDC and ~100 VDC, which failed to meet the recommended range. All LEDs illuminate on the circuit board. I tried swapping the tubes around and reheated any suspected cold joints with no improvement. I am at a point where I am not sure what to do. All resistances and other voltages are within the range.
Thank you,
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How did the resistance checks go? How are the resistances at terminals 10 and 11? I would not assume that there's anything wrong with the C4S board at the moment.
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Hello,
The resistance checks were all within spec. At terminal 10 it was 14k and at terminal 11 it was 16k.
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You will have to carefully measure the DC voltage at the outside of each of the 365 ohm brown Dale resistors on the 9 pin sockets to see what's appearing there.
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It looks like the resistor value that should be 365R is marked 31R6F (31.6 ohm?). Could that be the problem? I have attached a zoom-in on your IMG_2387.
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That is not the correct part, and will cause the exact issue you're having. If you shoot an e-mail to the replacementparts(At)bottlehead(dot)com e-mail, we can send the correct resistors to you.
-PB
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Thank you for posting the photos. I was stalled at the voltage check step since I had no idea how to turn over the chassis without damaging the tubes. The "box method" you have illustrated helps a lot!
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Hello,
Thank you for taking the time to help me solve my problem. I will be reaching out soon for the replacement parts.