Does anybody care which model A I this is, its age, or how/where it was purchased from?
Tubes, cables, cleaning???!!! Really?
Your attenuators are toast. A I insists they have a life span.
Questions for the A I experts here who've actually had this work done:
How much does A I currently charge for an attenuator assembly replacement?
How long does A I usually take to have this work done?
Get rid of it like your hair's on fire because their next question will be, "wouldn't you like us to upgrade the entire unit for just $xxxx?
Yes? "Oh just send us the check with your unit"
Most other equally fine preamplifiers offer a single volume that will last a lifetime and can be set at ANY desired level you hear not by having to look at the dots on the knobs and a transformer that doesn't hum.
Honestly jumbo, I really hope I'm wrong.