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AUDIO FORUMS >> General Discussion and Support >> Need help identifying loose wire
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Message started by Sean on 08/17/23 at 22:10:02

Title: Need help identifying loose wire
Post by Sean on 08/17/23 at 22:10:02

My SE84UFO developed a bit of noise in the volume pot so I opened it up to clean the pot. While it was open I took a close look around to see if anything else needed a cleaning. That's when i spotted this rogue wire just hanging around. Looks like the wire comes from the transformer. It looks like it may have slid off the power switch??? If anyone could help I'd greatly appreciate it!

image upload

Title: Re: Need help identifying loose wire
Post by Sean on 08/17/23 at 22:28:04

Just found this pic of when I got the amp last summer, seems that wire has just been hanging out for awhile.

Title: Re: Need help identifying loose wire
Post by will on 08/18/23 at 16:00:41

I have seen similar in my amps, but never thought to figure out what it was about. I am thinking this is likely a transformer lead that was not needed or this amp's operation so capped off. Maybe for 240 volts???

Title: Re: Need help identifying loose wire
Post by Sean on 08/18/23 at 18:54:27

Thanks Will, I think you may be correct. The amp has been flawless, other than the scratchy pot that just developed a week or two ago. There aren't many pics under the hood on these amps out there, but I found one that seems to have the same unconnected wire. My eyes are not what they used to be, I'm pretty certain there is no solder on the end of the loose wire so I'm going to button it back up.

Title: Re: Need help identifying loose wire
Post by will on 08/18/23 at 19:13:38

Sean, I guess you may know this, but in case, deoxit makes a lubricant that seems to work well when sparingly applied to pots. Also, just turning it back and forth lots of times, can solve the scratchy sound sometimes.

Title: Re: Need help identifying loose wire
Post by Sean on 08/18/23 at 19:35:34

Yep. When it first happened I did the back n forth rotate. It would clear up for a bit, but kept coming back. I opened it up yesterday and gently sprayed the pot and ran the knob back n forth. Since I wasn’t going to listen last night, I cleaned the RCA’s and speaker terminals and let it sit to allow any excess to evaporate. I’ll find out tonight if it worked.

Title: Re: Need help identifying loose wire
Post by will on 08/18/23 at 19:46:47

Bet that did it. Just a few days ago I cleaned an old pot with deoxit pot lubricant, as small a spray as I was able to pull off into each channel on the pot, swiped it back and forth a bit, and it is silent now.

Title: Re: Need help identifying loose wire
Post by Sean on 08/19/23 at 20:58:09

Everything is Zen again. No noise in pot.

Title: Re: Need help identifying loose wire
Post by 1stwattlife on 08/20/23 at 17:17:43

That wire is capped with clear shrink tube. It looks like just an unused wire from the transformer, left long enough to be usable in the future.

Title: Re: Need help identifying loose wire
Post by polinkuer12 on 12/14/23 at 01:20:42

i saw that in my SE84UFO

Title: Re: Need help identifying loose wire
Post by funch on 12/14/23 at 04:29:30

This is the power transformer used. The gray wire is 115V, the black is 125V. It's the gray that's used, not the black. That's why the black is capped with heat shrink.

https://www.hammfg.com/files/parts/pdf/272FX.pdf