Power Amp advice

Thanks anzaanimalclinic. The folks at audioreview all said the amp hummed when they received it. Mine was absolutely silent for a year (I bought it used on e-bay for $400). I will give the cheater plug treatment a try even though that seems wrong to me. Maybe that emulates ’floating’ the signal ground.

BTW I have had the top off so all of the exterior screws are tight.

Blissful silence

It has been a long time since I have lived in a house that had any two pronged receptacles, so cheater plugs are in short supply.  Not so unused IEC power cords.  So I cut off the ground prong on one of them.  No luck  Still, it was worth a shot.
Reading some more of the reviews, one of the reviewers indicated that a tech at Parasound suggested tightening the screws on the transistors.  Though none of them seemed loose, I made sure they were torqued down pretty solid.
Problem solved.  Thanks again anzaanimalclinic.  (and to Joe at audioreview).

LOL  After a few minutes the hum is back.  Not as loud as before, but still annoying.

Well as long as I had everything disconnected I turned the unit over and tightened all the screws on the bottom. This would include the screws that secure the transistors to the chassis. Some were very tight. All were tighter than finger tight. a couple I could not tighten. I suspect the issue with the ones I couldn’t tighten is that the glue that makes the nuts on the other side ’fixed’ has at some point during the last 25 years or so become ineffective.

Silence again (for now). 15 minutes in and still silent.I will post again if it resumes its wordless song.

I am still interested in what amp people think might be an appropriate upgrade for my Magnepan 1.7i’s and 6SN7 tube pre-amp considering a (roughly) $2,000 budget.

Hi Mark, I have a pair of 1.7i Magneplanar speaker and love them, especially with my new Mye Stands. I started out with a pair of Schiit Vidars running as monoblocks. Those are a good recommendation within your budget. Overall, when I had them, they were fine expect for the time of when one of them went into thermal protection when I was playing Jeff Beck loud. But I think if you watch the volume and they are in a well ventilated area, they should work for you. I have since I graded to a pair of Bryston 4B3 amps run in Bridge Mode as monoblocks. No issues and sound great. You could also likely by one 4B3 and run it in stereo mode. For cost considerations you can see if Bryston has a model that is lower in cost than the 4B3 that you can run in stereo or bridge/ mono mode. The Bryston amps may be out of your price range but they run well and with no issues. If the budget needs to be maintained, look for Schiit Vidars which sometimes you can find on B-Stock. Here or usaudiomart or on eBay for a good bit less than retail. Good luck!