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Topics - Meshuggah333

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Tubes and Hybrids / Proamplifiers VSQ 65 combo having a weird problem
« on: June 21, 2016, 04:39:41 AM »
History :
This amp is a gift from a friend, it took dust in a corner as he wasn't using it anymore. I don't really know what happened to it in the 26 years it's been out of the factory :D
I just know the preamp was retubed 2 years ago (some GT 7025 in V1,V4 and GT 12AX7 in V2, V3. Done by idiots and thieves but that another story)
It's from the Proamplifiers brand from Suffolk, England. The brand did a lot of amps in the 70's, 80's up to the mid 90's then did crash due to them being dependent of the US market (through the KMD brand) and basically loosing their only contract.

Problem :
If I cut all volume down, on any channels, I still hear a faint signal from the input.
Let me explain: it's as if even with the preamp completely cut off, I had a slight bit of input signal leaking through to the power amp.
This is even more obvious when I put a pedal that boost the input signal a lot, it sounds like a wet/dry signal (with distortion/fuzz pedals it's just horrible)

Do any of you have an idea of what ​​the problem might be?

The amp inputs 1/4" connectors are switching the preamp in and out of the signal path (they are switching connectors, I imagine it was done to prevent noises when nothing is connected to the amp), that might be coming from that but I'm not sure...

I'm certainly going to send it to a tech for a check up but I'm trying to solve most problems before that.


This is not mine but I have the exact same.

My first post and I already need help  ::)

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