Buzzing Noise While Disconnected From RCA

plynch · 1751

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Offline plynch

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on: September 24, 2015, 01:43:52 PM
Hi,

I've just recently noticed a buzzing noise coming from the amp when it is disconnected from the RCA cables. I did recently install an ALPS blue velvet so I'm not sure if it is related to that or not. I've swapped tubes and re-flowed the joints in between the pot and the RCA jacks. I have not however re-flowed the solder where the ground is connected on the pot. I thought I would run it by you guys to get your opinions before I did any more work on it.

Again, this only happens while the RCA cables are not connected to the amp.

Thanks,
Patrick

- Patrick Lynch

Offline Doc B.

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Reply #1 on: September 24, 2015, 04:37:59 PM
Yes it's probably related the the installation of the non-stock pot. Reflowing the connections might help. But since it only happens when a cable isn't connected and since you can only listen to music when a cable is connected, maybe not such a big deal?

Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.

Offline plynch

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Reply #2 on: September 24, 2015, 04:46:48 PM
You're right, it's not that big of a deal. I think I'll probably stop messing with it before I make matters worse.  ;D

- Patrick Lynch

Offline Strikkflypilot

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Reply #3 on: September 24, 2015, 07:44:53 PM
But Doc, I thought some buzzing was normal if nothing is connected...

Home system:
Sources: Ibasso DX90, Google Chromecast Audio optical out
DAC: Schiit Gumby
Amp: Bottlehead Mainline
http://bottlehead.com/smf/index.php?topic=7463.0
Phones: HD800S

Office:
Sources: Iphone/ Ipod
DAC: Dragonfly Red+Jtrbug
Amp: Crack/Speedball heavily modded
Phones: HD580,HD600 grilles

Offline Paul Joppa

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Reply #4 on: September 24, 2015, 07:53:32 PM
Quote from: Strikkflypilot on September 24, 2015, 07:44:53 PM
But Doc, I thought some buzzing was normal if nothing is connected...
There are many potential sources of buzzing that are only evident when the inputs are disconnected. Those sources are external to the amp. So I'd rather say that buzzing is not abnormal in a typical home environment.

Paul Joppa

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