[TechAssist] Re: Noisey coils & Transformers
- From: "Damon" <DAMON101@xxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 29 Nov 2001 07:47:20 -0500
I read a posting that suggested using a hot glue gun. I got the opportunity
to use it on an IHVT recently and it works even better than silicone.
Silicone is just too flexy where the hot glue isn't. I'm switching to hot
glue from now on.
As for isolating the culprit, I roll up a piece of paper into a cone, stick
it in my ear and find the loudest point. That will at least isolate it to 1
or 2 coils.
So that ringing in my ears is Tinnitus eh? I always thought it was from
drinking too much coffee.
Damon Brunger
damon101@xxxxxxxxxxxxxx
Telrad Electronic Services
Ft Wayne, IN 46815
----- Original Message -----
From: "Jerry" <geiting@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, November 28, 2001 10:53 PM
Subject: [TechAssist] Re: Noisey coils & Transformers
>
> Good questions. These are always hard to find and fix. I don't think
many
> people hear the 15.7 kHz horz, but rather hear the 1st sub harmonic (7867
> Hz). The most common component I find causing these problems is those
horz
> lin chokes. They usually have a gray colored plastic shrink covering on
> them. Removing that and putting a light coat of silicon sealant on it
> usually cures that. I'm 42 and my hearing rolls off at about 12 kHz and I
> have tinitus (ringing in the ears), the sub harmonic of horz is discordant
> with the ringing I hear and drives me nuts (I understand why the dog howls
> when he hears the sirens)!
>
> Jerry
> Christian's Electronic Service
>
> ----- Original Message -----
> From: "Dennis Viereck" <wa6ati@xxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, November 28, 2001 10:38 PM
> Subject: [TechAssist] Noisey coils & Transformers
>
>
> |
> | Since we ran the "cleaning the video head" into the ground I have
another
> | question for the group.
> |
> | I would like to know how all of you check for coils, transformers, and
> other
> | components that sometime have the tendency to squeal at high audible
> frequencies
> | in televisions? The devices I mean are like flybacks, linearity coils,
> yokes
> | and brackets for these devices.
> |
> | Once you find, how do you correct them? By replacement or other tricks?
> |
> | For those of you, like me, who's hearing rolls off at 7 khz and can't
hear
> these
> | noises, how do you detect them, and how do you know you have it repaired
> if you
> | can't hear these high frequencies?
> |
> | Dennis Viereck
> |
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>
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