Mains Spur Oddness

Posted by: Tim Danaher on 10 September 2003

Hello, Folks

John from Diverse Records came around the other night to try out one of his new releases on my system before it gets final approval (Frank Black and the Catholics - Show me your tears..grrrrreat!).

Anyway, while we were listening it sounded as though the stylus was periodically hitting something in a groove -- John was not pleased, he thought the pressing was shot -- anyway, this sound continued AFTER the record was taken off. Every minute or so...POP! This only occurs on Phono input (I listen to the LP12 v. rarely these days). The system is on its own mains consumer unit with three RCBOs -- one for sources, one for *Caps, one for NAPs.

Any one know what might be going on?

Oh yes, and I now have my first genuine, bona fide White Label pressing (Thanks, John!)

Cheers,

Tim
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Os nid Campagnolo yw hi, dyw hi ddim yn werth ei marcho...

Posted on: 11 September 2003 by Stevo

Have you just put your central heating on now that it's turned a bit cooler? Sounds like a boiler going on and off.

Stephen.

Posted on: 11 September 2003 by Tim Danaher

Thanks, Roy and Stevo. My first thoughts were along the electrical interference line...but with a dedicated spur & CU should this happen at all? Will swap out the phono boards when I have the time.

Cheers,

Tim
_____________________________

Os nid Campagnolo yw hi, dyw hi ddim yn werth ei marcho...

Posted on: 11 September 2003 by Paul Ranson

If the 'pop' is on both channels it seems unlikely that it is a fault per se, although verifying the connections would be a good thing.

Using a spur and separate CU puts some distance between your hifi and sources of mains bound interference, but it doesn't isolate them. It does sound like something with a thermostat, you don't have a (soldering) iron on somewhere?

Paul