Background Noise at Idle, MK I RI

Pre Recto days. Boogie modified Fenders, Mark I-IV, Dual Calibers, etc

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Pablomago
Mark II
Posts: 59
Joined: Sun Feb 06, 2005 2:03 pm
Location: Fort Collins, CO

Background Noise at Idle, MK I RI

Post by Pablomago » Wed Aug 23, 2017 5:44 pm

I'm getting my beloved 1990 MK I RI ready to sell and I want it in tip-top shape for it's new owner. I plugged it in today and I noticed a lot of background noise. Kind of a hiss that gets louder and softer. I don't notice it when I play, but I want to have it as quiet as I can.

I have substitute preamp tubes to try next, but I don't think it's ever been recapped and I'm wondering if that might be where the noise is coming from.

Any other thoughts?
Mesa Boogie MK I RI
Mesa Boogie Studio .22+

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