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Topic: GuyaTone Tone Control |
William W Western
From:
Canada
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Posted 23 Feb 2011 7:28 pm |
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This Guyatone "D8" of mine has a green gizmo between the tone control and the volume control. It has become disconnected (solder connection) from the tone prong. I can solder it back but assume I must be careful with heating up (heat sink?)
 whatever that little flat green thing is. Any ideas? |
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Blake Hawkins
From:
Florida
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Posted 23 Feb 2011 7:54 pm
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You may have noticed that your tone control does not
work any more.
The little flat,green, gizmo is a capacitor.
It makes the tone control work.
Just connect it back to where it came fron and
you will be fine.
Should use a pencil type soldering iron. Not a gun.
If you are concerned about heat sinking, just hold the wire with a pair of needle nose pliers between
the terminal and the cap when you solder. |
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William W Western
From:
Canada
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Posted 23 Feb 2011 9:47 pm
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| Thanks Blake. What happened was the tone knob turned off the nut affixing it to the plate and that is what broke the connection to the capacitor. Just couldn't remember from Grade Eight Electricity Class how tender the green gizmo might be. Should be back up in no time. |
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Jason Hull
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Posted 24 Feb 2011 2:15 am
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| It looks like you have a ground loop, which can add noise. The controls are grounded on the metal plate; the ground wires attached to the pot covers are not necessary. |
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Blake Hawkins
From:
Florida
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Posted 24 Feb 2011 6:23 am
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Jason, If I may add a bit about the grounding of the pots.
What you said is technically correct. However,
in this instance it does not cause a ground loop.
Having the ground wire on the back of the pots
ties all the grounds toether.
If you ground the pots only through the mounting
of the pot, when the pot gets loose you get hum.
Fender wires this way and I've had that happen on
both my Tele and my P Bass.
I've run a ground buss across the rear of the pots all the way to the output jack.
No hum and if a control works loose, still no hum.
Fender's technique is to solder the component ground
to the pot cover and then rely on the pot mounting
to complete the ground. Each pot is grounded
individually. If one gets loose, you lose the ground
on that part of the circuit.
From the picture, I can't tell exactly how the Guyatone is wired. |
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Jason Hull
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Posted 24 Feb 2011 9:24 am
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| If the pots are installed correctly, they don't come loose. The ground loop, and extra noise, is not worth the "insurance". |
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Blake Hawkins
From:
Florida
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Posted 25 Feb 2011 6:35 am
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Jason,
You must lead a charmed life if you have played for
a long time with bands and never had anything go wrong on stage.
My best wishes for your continued good luck.
Blake |
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