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Build help and troubleshooting => MU524 Vari-Mu Tube Compressor => Topic started by: CGMix on December 27, 2025, 04:43:53 PM

Title: Initial AC voltage jump
Post by: CGMix on December 27, 2025, 04:43:53 PM

After sending a 1V, 1K tone of not the compressor, my voltage jumps to a little over 7V instead of 3-4V. This does affect the rest of the calibration. Where should I look? All other voltages look to be where they should. 

Title: Re: Initial AC voltage jump
Post by: JPK on December 31, 2025, 09:35:25 AM

Check that you have not reversed transformer T1. The label must be facing the back of the module.
What are the AC levels on TP3 and TP4, relative to 0V (1.75V)?