Orion 250 hcca gen 2 power supply blown

-15 is OK.

If you're going to do this type of work, you need a scope but I don't want you to buy a piece of junk.

I am sure I would make good use of a scope. I do know how to use them. I will follow your recommendation on bcae and look for a tek.

Do both channels produce clean audio other than the noise?

They do. Loud, strong, normal, etc. Amp doesn't get hot, etc etc. If I adjust the gain way up it is almost not noticeable. It sounds like the tone medical equipment makes sometimes. Very annoying and not right. I am sure it is the amp and not my setup.
 
Hitachi, kenwood, BK precision make decent scopes. You want one that has at least one locked waveform displayed or a guarantee that it works properly. If you're going to buy on ebay, email me the auction numbers.

babin_perry@yahoo.com

What's your budget?

Thank you. I don't know $300, more if it looks right. I appreciate your help, it would be nice to run anything I'm interested in by you first for sure.