NOISE!

Express, Liverpool, Rocket, Dirty Little Monster, etc.

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jckid649
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Re: NOISE!

Post by jckid649 »

Okay how's this for crazy?

I just got home from work and decided to move the amp and speaker cabinet from the bedroom where I tested it and put it back out in the garage where my work area is. I plug it in, test to see if I have any noise when no guitar is plugged in. Turn up all the controls, tap wires and tubes...basically try to induce microphonics. Nothing. Perfectly sound.

So then I plug in a patch cable at the input and repeat the same procedure. Nothing. Sound as a pound. Then I plug in a guitar and repeat. Nothing. It plays beautifully without an ounce of hum! WTF!

Could I have been picking up some kind of interference in another room of the house that no longer was present in the garage? I did have it laying on it's top side with the power tubes touching the top of my amp cabinet when it was making all that noise earlier. Now it's on a work bench with a rubber mat turned over on its bottom and shielded. But I even flipped it back over to expose the circuitry again and try to induce microphonics and still it played perfectly fine. Strange. I'm thinking this must be some issue with shielding.
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M Fowler
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Re: NOISE!

Post by M Fowler »

To me it sounds like a normal TW Express once your past 2 hold on your going for a ride. The amp is loud, has loud hiss and almost uncontrollable.
jckid649
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Re: NOISE!

Post by jckid649 »

M Fowler wrote:To me it sounds like a normal TW Express once your past 2 hold on your going for a ride. The amp is loud, has loud hiss and almost uncontrollable.
Yeah but that wasn't even music that was just a chaotic nightmare and now it's not there. Would you say it's all just a shielding issue?
jckid649
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Re: NOISE!

Post by jckid649 »

VacuumVoodoo wrote:Redo solder joints. There are solder blobs on a lot of them. Blob=risk of bad, internally porous joint. These can produce crackle and nise.
If you are referring to the blobs on top of the turrets those were done from the people at ceriatone, not my solder work. They look pretty clean, shiny and solid.
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M Fowler
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Re: NOISE!

Post by M Fowler »

Put a cover on the chassis and the chassis loaded into the cabinet then test.

Checking out each solder joint is advisable as well as correct wiring.

If you have screech sound that would be reversed primary leads of the OT.

The amp should produce musical tones and then you can try do something about hiss later.

Mark
ampgeek
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Re: NOISE!

Post by ampgeek »

Were there any light dimmers and/or fan speed controllers active and on the same feeder circuit that was powering your amp when the offending condition occured?

Those can inject noise into an amp via the mains power supply.


Cheers,
Dave O.
jckid649
Posts: 214
Joined: Fri May 18, 2012 3:47 am

Re: NOISE!

Post by jckid649 »

ampgeek wrote:Were there any light dimmers and/or fan speed controllers active and on the same feeder circuit that was powering your amp when the offending condition occured?

Those can inject noise into an amp via the mains power supply.


Cheers,
Dave O.
None of those were part of the circuit. It seems everything is fine now.
jckid649
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Re: NOISE!

Post by jckid649 »

M Fowler wrote:To me it sounds like a normal TW Express once your past 2 hold on your going for a ride. The amp is loud, has loud hiss and almost uncontrollable.
Looks like you were right. Now that it's shielded better it sings like a dream. That circuit is everything they say it is! :D
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Reeltarded
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Re: NOISE!

Post by Reeltarded »

You are welcome. I snuck in while you were out and did a little messing with it. I found a couple things wrong, one of those being Wayne Newton's toupee grounding a little between the board and chassis. I removed it and it seems fine. Play it like that for a while and try another wig if you need more hair.

:roll: :)
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M Fowler
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Re: NOISE!

Post by M Fowler »

Reeltarded wrote:You are welcome. I snuck in while you were out and did a little messing with it. I found a couple things wrong, one of those being Wayne Newton's toupee grounding a little between the board and chassis. I removed it and it seems fine. Play it like that for a while and try another wig if you need more hair.

:roll: :)
Definitely the Wayne Newton toupee has to go but if the amp can't get good hair like Donald Trump's then we need to regroup and think this over.
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Reeltarded
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Re: NOISE!

Post by Reeltarded »

hahaha Trump could fur a full stack.
Bob S
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Re: NOISE!

Post by Bob S »

Be honest Reel!
You adjusted the whiskers, didn't you. :twisted:
The toupee is just a red mackeral.
Why Aye Man
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Reeltarded
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Re: NOISE!

Post by Reeltarded »

Honestly there was a pair of rabbit ears hooked up to the input of the PI. I think it was acting as an antenna.
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M Fowler
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Re: NOISE!

Post by M Fowler »

Any layouts of that hair and whiskers? :lol:
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Reeltarded
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Re: NOISE!

Post by Reeltarded »

It's Erwin Schrodinger's birthday. Let me go check the box.

:)
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