• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

Realistic STA-76 weird soft tapping/squawking in right channel.

Monkeyminion

Monkeyminion

New Member
Hey All,

Long time lurker, finally registered an account.

i have a Realistic STA-76, that I just got last month. It’s only my second ever receiver and first vintage one. (First receiver was a Yamaha r-v905) I love my little sta-75, but it does this weird tapping & squelch sound sometimes. I took it apart last week, cleaned everything I could find with isopropyl alcohol and deoxit, put it back together, and it still did it. Changed the location of where it was plugged in and it does it less, and much quieter than it was, but it’s still there and when it’s quiet, (I.e. no music, like between songs) it’s really annoying. Any ideas on how to approach this or what’s happening? I’m not opposed to learning how to fix stuff, I’d actually like to learn. But like I said, this is my first time.

thanks!


(I don’t know how to upload a video of the sound)
 
Register to hide this ad
Hello. A video or sound file of the noise will help us to diagnose. The description alone doesn't mean too much.

Try to upload it to some file sharing service (google drive, dropbox, or any video site like youtube) and copy the link here.
 
If it's something like a cold solder joint or loose connection of some sort, try poking around the entire board with a chopstick or something similar.
 
Essentially, the tapping or vibration on the board(s) might reveal where a loose contact may be and point to a bad solder connection or loose wire or ground connection possibly causing the noise.
 
elnaldo said:
Perfect.

Is that noise generated by the amp? I mean, standalone amp, nothing connected to it. Try with headphones, not even speakers, and then connect the speakers and continue listening the headphones to see if anything changes.

It sounds very rythmic, perfectly timed, not a random noise.
Click to expand...
I'll check that. One of my friends thinks it's my house's old wiring causing interference. I don't know anything about this stuff, yet, so I figured I'd ask y'all. I'll need to get an adapter to check with headphones. This has a 1/4" jack on it and I don't have any headphones like that.
 
Monkeyminion said:
I'll check that. One of my friends thinks it's my house's old wiring causing interference. I don't know anything about this stuff, yet, so I figured I'd ask y'all.
Click to expand...

If there is a large motor, an elevator, a large washing machine, those kind of devices create noises that travel along the power lines. If it's near your equipment, probably you could hear the device at the same time you hear the noise in your amp.
 
UPDATE - I figured out what the sound was. I had my wifi router too close to the receiver and it was causing feedback. That would explain why it worked fine when I had it across the room to work on it, but it started doing it again when I reinstalled it on my shelves - right above my router.
 
Damn noisy routers. :mad:

I suspect that this will throw a lot of people off who have routers or computers next to their systems. Even cell phones produce noise that can be picked up by amps and stereo systems. :rolleyes:
 
You must log in or register to reply here.
Back
Top Bottom