Re: Yoke Replacement
- From: "Art" <plotsligt@xxxxxxxxxxx>
- Date: Sun, 5 Jun 2005 15:15:00 -0400
May consider the value of the yoke ringing caps in the input and return
circuits??
"Chris F." <zappymanREMOVETHIS@xxxxxxxxxxx> wrote in message
news:FtDoe.42280$Ph4.982016@xxxxxxxxxxxxxxxxxxxxxxxxxx
>I was just thinking the same thing, I will give that a try and see what
> happens.
>
> Chris
> "James Sweet" <jamessweet@xxxxxxxxxxx> wrote in message
> news:ZBroe.4971$J73.2691@xxxxxxxxxxx
>>
>> "Chris F." <zappymanREMOVETHIS@xxxxxxxxxxx> wrote in message
>> news:W2loe.41922$Ph4.958846@xxxxxxxxxxxxxxxxxxxxxxxxxx
>> > This must be one of those "really desperate to fix it" projects. A
>> little
>> > 9" color TV/radio combo I picked up in the trash, had a badly burned
> yoke.
>> I
>> > was able to isolate and insulate the shorted windings, but disturbing
> the
>> > windings threw the convergence way off and the yoke was still as
>> > useless
>> as
>> > ever. Now I just happened to have a good yoke from an identical CRT
>> > (27GDC85X), however it was designed for a completely different set. I
>> > installed it anyway, the vertical windings are a perfect match but the
>> > horizontal ones have too low an impedence - causes high-voltage
>> > shutdown
>> > unless powered with a Variac. I determined that the original yoke H
>> winding
>> > was about 13.2 ohms, and the replacement yoke H winding is about 3.9. A
>> bold
>> > idea came to mind; wind an impedence-matching transformer from an old
>> > flyback core and some magnet wire. I have several pounds of AWG 27 and
> 38
>> > magnet wire that I could do this with. The question is: do I need a 1:1
>> > turns ratio? I suspect I do, this means that the two windings would
>> > have
>> the
>> > same number of turns but use different wire gauges.
>> > Think this would work? I know it's a lot more trouble than the old
>> > set
>> is
>> > worth, but I'm not exactly busy these days and I hate to junk such a
> nice
>> > set. 9"-ers are not abundant in my supply, so it's certainly worth an
> hour
>> > or twos work to get this going.
>> > Thanks for any advice.
>> >
>> >
>>
>> More the the impedance is the inductance. Try winding an inductor and
>> placing it in series with the yoke, that may well work.
>>
>>
>
>
.
- References:
- Yoke Replacement
- From: Chris F.
- Re: Yoke Replacement
- From: James Sweet
- Re: Yoke Replacement
- From: Chris F.
- Yoke Replacement
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