[TechAssist] Re: Subject: Noisey coils & Transformers


Dennis
If you can't hear it hook up a small mike to your scope to find it.,Les

----- 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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