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Sudden susceptibility of phone leads to noise

108.38.55.213
Posted on April 29, 2016 at 15:27:06
mr.bear
Audiophile

Posts: 4167
Joined: November 13, 2001
 I got back from vacation and the gremlins had been at work! My TT suddenly has developed an extreme sensitivity to routing of the leads to my preamp. Move them an inch or 3 and there's awful buzz at 60Hz (a buzz, not a nice little hum).

I have them taped up away from the nasty nest of power cables behind my equipment shelf and it sounds fine, but I can't help but wonder what's up?

Any ideas?

 

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RE: Sudden susceptibility of phone leads to noise, posted on April 29, 2016 at 17:53:11
Interstage Tranny
Audiophile

Posts: 3063
Location: Eastern
Joined: October 4, 2006
 Sure, this happens exactly when we hope it will not; as in returning from vacation...

With season's weather changing, oxidation might be rearing its' ugly head. Oxidation builds up and becomes a "dirty" highly resistive connection. Consider that RCA leads do not make the best connections. With my very vintage setups, cleaning my cables, or at least re-twisting them tightly becomes a necessity too often. While gold plated leads take a long time to oxidize, their oxidation is not very conductive. Nickel plating does not take a long time to oxidize. Silver plating oxidizes rather quickly; but silver's oxidation can still be nicely conductive. This is one reason many mil-spec connectors used silver plating...

Long ago, I thought spraying the "good stuff" was enough for a long while. Well, an ultra-clean connection is needed first; then a coating of the good deoxit stuff applied after the tight connection seems best.

I had this really dirty slide-switch that I cleaned with rubbing alcohol; then shot with the deox. Well, the deox did not do it. The switch kept acting like it still had an open connection. I recleaned the switch with a liberal douse of 91% rubbing alc and then held the unit upside down to assure the dirty alc/solvent mix would "leak out" as it evaporated. That did the trick ! Then, I applied a drop of the deox and that switch has been good for a few years; now. Of course, now that I said that, I will get an open or a buzz with that pesky unit....

 

Denatured Alcohol, posted on April 29, 2016 at 18:37:20
MannyE
Audiophile

Posts: 2088
Location: Miami Beach
Joined: March 4, 2001
 I bathe everything in that stuff. It just cleans all the gunk out and leaves nothing behind. Got a wet iPhone? Fill glass with the stuff and leave it in there for a an hour or so then let it dry... fixed!

 

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