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Tone control and ceiling fan issues

I need some help to analysis and find solutions or fixed for my preamp Rotel 1590
When tone control bypass is on the preamp is dead quiet  but when tone control bypass is off the amp make some hissing noise and react to my ceiling fan and AC when I turn on the ceiling fan/ or AC KICK IN it makes some loud pop sound it happens only when tone control bypass is off
I have try 4 different amps no luck 
I’m  using dedicated 20amp lines and surgex SA1810 and Panamax 
I have 3 Sony AVRs ZA5000ES series in this house and non of them has that problem 
I use to own Parasound P6 no issues at all 
I try connect the preamp straight to wall or conditioner no luck 
I try different outlet same problem 4 different speakers KLF 30 chorus ii Epic CF4 and Forte ii 
I bought it use so no warranty 
I have try some ground plugs and Ametek Powervar nothing works 
any suggestions or recommendations for fix in Houston Texas area thanks 
128x128lordrootman

Showing 3 responses by oldhvymec

oldhvymec
5,101 posts
 

If I understand you correctly.. You engage the tone control and it makes noise, without it, it doesn't.

Your asking where a repair facility is in the Houston Area?
oldhvymec
5,101 posts
 
It’s a dedicated 20 amp. NOTHING else is on the circuit.

If you turn on the ceiling fan you get a noise or the AC, correct?

You get a pop, but only when you engage the tone control. You have the work around for a BROKEN tone control. You have other units that will work in it’s place. No issues right? I’m not understanding what you’re asking..

One time my son came into work with his mother to bring me lunch, he was 4 years old at the time. A guy was having a heck of a time fixing this electrical problem on a Pete 379. So I took my son and introduced him to the older mechanic (40 years ago) and I said, "Ben tell him what’s wrong". My son said quickly, "IT BOKE", I chuckled and said even my son knows what’s wrong, what’s your deal? The guy just busted up.. We all laughed about that for 15 more years.. It’s Broke... He Knew..

OP "IT BOKE"

But add something after so you can still have tone control?

How about a Zpre3 Parasound, what a nugget that is. I found one in perfect shape and SQ was perfect. 295.00 usd.. They are a great little preamp..

Respect
oldhvymec
5,101 posts
 
OK I understand now. You've owned other Rotels. The other one did the same thing when the tone control was engaged.

Well I truly think that is a question for Rotel, don't you OP? I've never dealt with them. Maybe they have an answer, EVEN if it's what you don't want to hear..

Regards
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