[Amps] B&W FC-30 Filament Choke: EPILOGUE

[Gary Schafer]

> -----Original Message-----
> From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
> Behalf Of EP Swynar
> Sent: Sunday, March 04, 2007 7:56 AM
> To: topband at contesting.com; amps at contesting.com
> Subject: [Amps] B&W FC-30 Filament Choke: EPILOGUE
> 
> I've always been curious as to the possible effectiveness of employing the
> ferrite core from a TV picture tube deflection yoke / coil assembly as the
> foundation for a robust torroid-type filament choke...I have an
> inordinately LARGE example of one here, which was removed from a junked
> early colour TV set many years ago: maybe this is an opportunity in
> disguise, waiting to be realized...
> 
> I have no knowledge of anyone ever having tried this latter trick, but I
> can't see why it wouldn't work.
> 
> ~73~ Eddy VE3CUI - VE3XZ

I have a pair of 813's in GG that I built many years ago and I built a
filament choke from a TV flyback core. It works fine. If I remember right I
cut the ends off one of the C sections to make a straight bar. You could
glue 2 sections together to make a longer one if needed too.

It seems to me that there was an article or two on using these things in one
of the ham magazines years ago. Maybe in the 60's??

73
Gary  K4FMX