Re: Yoke Replacement
- From: u_1061771155@xxxxxxx (Remove _ for valid address)
- Date: 5 Jun 2005 22:48:06 GMT
In article <W2loe.41922$Ph4.958846@xxxxxxxxxxxxxxxxxxxxxxx>, Chris F. wrote:
....[snipped]...
> 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?
The turns ratio would need to be the square root of the impedance ratio.
But bear in mind that the DC resistance isn't the same
as the impedance at the operating frequency. I'd guess 2:1 turns ratio
would be close (the 2 on the driving side and the 1 on the yoke side.)
Wire gauge is not critical, use the thickest that fits mechanically.
However this may not work well, due to losses and disturbing the
expectations of the driving circuitry.
However, I suspect there is a _much_ easier solution. Yokes usually have
two separate coils, connected in either series or parallel. There's a
good chance you'll find yours is in parallel, in which case if you
convert it to series you'll end up with a 4x higher impedance and you'll
be quite close to the original yoke impedance, probably close enough to
work with minor adjustments.
Good luck!
Mike.
.
- Follow-Ups:
- Re: Yoke Replacement
- From: Doug
- Re: Yoke Replacement
- References:
- Yoke Replacement
- From: Chris F.
- Yoke Replacement
- Prev by Date: VCR Samsung SV-651F
- Next by Date: Re: Changing Focus Issues with an IBM P260
- Previous by thread: Re: Yoke Replacement
- Next by thread: Re: Yoke Replacement
- Index(es):
Relevant Pages
|
