Buzz noise from Crack

Jimb0 · 1744

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Offline Jimb0

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on: March 12, 2018, 05:03:14 PM
Hello. I've sent out a fully assembled Crack with Speedball to a friend a few days ago and he's having issues with it. I checked out this Crack before I sent it out and all the voltages checked out fine and there were no problems. The only thing I didn't test out was the power cord that came with it and used the one I already had. He says there is a buzzing noise coming from the left channel of his headphones. He also said when he taps the chassis beside the big tube and the power switch it will get louder and quieter. He says it sounds more like an 'electronic buzz' rather than turning the volume all the way up and hearing a hiss.

I want to rule out everything before I have him ship it back to me. I shipped it out quite securely with plenty of cushion and blue taped the chassis so it didn't move. I tested the tubes and didn't hear buzzing noises.

What are possible issues he could be having?



Offline Doc B.

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Reply #1 on: March 12, 2018, 05:26:01 PM
Something probably got knocked around. Most likely a connection came loose in shipping, or possibly a couple of things are touching that shouldn't be. Someone will have to take a look underneath and see if they can figure out where the problem is located.

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


Offline Jimb0

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Reply #2 on: March 13, 2018, 09:38:11 AM
Thanks Doc I'll have him send it back



Offline Jimb0

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Reply #3 on: March 21, 2018, 10:48:56 AM
So I just received my amp back. I first tested voltages to see if everything was running good. Everything checked out fine.

I then tested the amp with headphones and heard no buzzing noise.

So if everything works, was it his headphones that was making the noise?

He was using HD600's



Online Paul Birkeland

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Reply #4 on: March 21, 2018, 10:50:27 AM
Was he listening to the amp with no source connected and the volume all the way up?

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline Jimb0

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Reply #5 on: March 21, 2018, 11:19:54 AM
Yes and yes



Offline Doc B.

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Reply #6 on: March 21, 2018, 11:53:52 AM
Is this one of the Crack amps that has been for sale on ebay?

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


Online Paul Birkeland

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Reply #7 on: March 22, 2018, 04:12:18 AM

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline Jimb0

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Reply #8 on: May 05, 2018, 03:52:59 AM
Is this one of the Crack amps that has been for sale on ebay?

Hi Doc. Yes I'm the one selling the amps on eBay

See Crack FAQ #5
Crack FAQ

Thanks. I think he may have just changed his mind about buying it that's why he sent it back.



Offline Doc B.

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Reply #9 on: May 05, 2018, 04:24:04 AM
You might want to make up your own FAQ that you can email to your customers. Just something that gives general hookup and easy troubleshooting advice, like how to unplug cables at various points to determine where a noise or a bad channel might be located.

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


Offline Jimb0

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Reply #10 on: May 05, 2018, 06:21:40 AM
You might want to make up your own FAQ that you can email to your customers. Just something that gives general hookup and easy troubleshooting advice, like how to unplug cables at various points to determine where a noise or a bad channel might be located.

Thanks Doc. That would definitely be a good thing to have. Appreciate that.