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[help] High frequency noise coming from Reality

post #1 of 25
Thread Starter 
It has been a few days since I noticed that sometimes my SonicAdventure Amp outputs high frequency (above 14-15kHz, volume is actually not so soft), what's the problem? Before It happens randomly but didn't last long, I noticed it when the music was playing and it stayed after I shut the music off. Just then I turned my amp on and the treble appeared again. It lasts for about 3 minutes before I unplugged the cable off the PCDP, when I plugged it back in it's gone.
post #2 of 25
dbl post
post #3 of 25
Probably a ground loop. Try plugging them in to different outlets.

Mark
post #4 of 25
It sounds to me like you have a ringing tube. Is the noise isolated to one channel?

NGF
post #5 of 25
Thread Starter 
Quote:
Originally posted by tanfenton
It sounds to me like you have a ringing tube. Is the noise isolated to one channel?

NGF
YES! Only from the right channel.
post #6 of 25
Thread Starter 
please help me......
post #7 of 25
Swap the tube from the right socket into the left and listen again for that noise.

NGF
post #8 of 25
Thread Starter 
I will try that. Right now the thing is that this happens randomly, so it will take some time before it happens again, or maybe not.
post #9 of 25
Xin,

If you have more than one set of tubes, check and see if you get this problem with the other set of them. It could be either a bad tube or tubes, that is causing this problem. Did the problem surface after you put in your new Amperex tubes?

Make sure that your RCA cables are NOT laying across your AC power cord. This is NOT your problem, but this will induce some hum into your system if they are hooked-up and touching each other.

(Not to startle you at all...) If this doesn't work, and your amp still has noise issues, find a good repair shop to troubleshoot the amp and find out what is causing the noise to come thru the amp. Could be just a bad MOSFET that is causing the problem, and those are cheap and easy to replace.
post #10 of 25
For your sake, I hope it is something simple, but maybe this amps reliability is what caused it to fail commercially? I guess that a warranty from a non-existant company is also out of the question?

For your sake, I hope it is as simple as a ringing tube.
Good Luck!
post #11 of 25
Thread Starter 
I just used it to watched a 22 minutes divx movie, no problem.

So it is a problem that doesn't happen often, dunno if that's a good thing or not.

Am I the only one who owns Reality here? If so, that's some kind of record.

I will do the following things:

1. Switch tubes
2. Put ferrite on the power cord.
3. Plug into a different wall outlet.
post #12 of 25
I recently bought the Reality from Sonicthewebhog (who bought it from Servinginecuador). I've had it for about a week and have been listening to it for about 3-4 hours a day. I haven't had that problem yet. And I have the Amprex tubes plugged in too.

Let me know how if it's sitll a problem. I really like the amp and don't want to suffer any realitabilty problems.

PS - has anyone confirmed or denied that Sonic Adventure went under?
post #13 of 25
Quote:
PS - has anyone confirmed or denied that Sonic Adventure went under?
JahJah claims he knows, but for some reason he ain't tellin'? Maybe he is working up some deal where he will be the exclusive dealer for the Reality and he doesn't want anyone else in on his idea? Nah!

More likely, he owns a Reality and he doesn't want its' resale value to plummet when folks find out they went under...?

As for reliability... a 50% problem rate wouldn't be too good.
post #14 of 25
Thread Starter 
Oh that was a joke, sorry.
post #15 of 25
Joke?

I don't get it...
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