Blackface Reverb question

[ronin4hire]

On my Deluxe reverb reissue, cranking the reverb knob past 4 seems to generate quite a bit of noise. It gradualy gets worse as I crank it up higher. is this normal?

[meterman]

Shouldn't add noise, that's a tube driven reverb on that one right? I'd try changing that tube out, could be an easy fix. Some amps have a tube reverb recovery stage too I believe....

[Joe Porto]

The reverb circuit adds some noise, but not a lot. V3 (12AT7) is the reverb driver, and 1/2 of V4 (12AX7) is the reverb return. If either of these tubes have noise issues, it will show up when using the reverb.

[tmac]

yes it adds noise, you are cranking an amplification stage (reverb). Take the reverb drive tube out & crank it & you still will get noise