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Do It Yourself (DIY) paradise for tube and SET project builders.

When the inputs are shorted the amp is dead silent. (great!)

It is not your tubes. When it is quiet with the inputs shorted, your amp is quiet electrically. However, you have a grounding issue. Really check how the RCA input grounds are routed inside the amp compared to how they were before the mod. Check grounds of any shielded wire in the amp. Try taking a piece of wire and touch the amp chassis to another component. Tracking down this type of ground issue is tricky but you will find it.


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