Speedball High Voltage [resolved]

ghume · 1526

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Offline ghume

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on: July 11, 2016, 06:08:09 PM
I have just installed the small speedball board and my OA and OB voltages are high. I have also noticed that the 2 LEDs connected to the 12AU7 socket no longer light up (they had lit up before installing the speedball small board). I have checked the resistance of both R1 resistors and they are correct (237 ohms), and I have double checked the orientation of MJE-350 and PN2907. Here are my voltage measurements:

OA - 138v
IA - 148v
B-A/B - 0v
IB - 148v
OB - 138v

I have also attached photos of my board. Thanks for your help.
« Last Edit: July 13, 2016, 06:19:03 AM by Caucasian Blackplate »


Offline fullheadofnothing

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Reply #1 on: July 12, 2016, 09:15:48 AM
Reheat your solder joints; hold the iron long enough for the solder to liquefy and evenly coat the wire and terminal. If there is not enough solder present to evenly coat, add a small amount of fresh solder.

Joshua Harris

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Offline ghume

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Reply #2 on: July 12, 2016, 04:21:43 PM
Thanks Joshua,

Reheating the solder joints did the trick!


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