|[AMRadio] WTB: National R-175 plate choke or equiv|
brett.gazdzinski at verizonbusiness.com
Thu Feb 22 08:24:56 EST 2007
The B+W 800 series chokes work well,
I have the 800 in my 2x813 rig that does 1.6
to 30 mc just fine.
The 800 series choke is just enameled wire close wound
on a ceramic form that is about 5/8 inch round.
Later ones might have been wound on plastic forms.
They are still around cheap.
Any plate choke that will handle the current should work,
I never found one that caused problems as long as it did not arc
to ground or melt from the current.
>From looking in the junk box, it looks like some homebrewers
or companies mounted them to close to ground as I have a few
that show arcing.
Leave plenty of space to ground and all other parts.
> -----Original Message-----
> From: amradio-bounces at mailman.qth.net
> [mailto:amradio-bounces at mailman.qth.net] On Behalf Of Mark W1EOF
> Sent: Wednesday, February 21, 2007 10:55 PM
> To: Discussion of AM Radio in the Amateur Service
> Subject: [AMRadio] WTB: National R-175 plate choke or equiv
> I need a nice plate choke for my 813x2 amp. I was going to
> homebrew one
> now I'm thinking that there will be enough variables without
> that. I'm
> going for operation on all bands 160-10. So I'd rather use a
> known good
> design plate choke like the National R-175. Anybody got one
> for sale or
> Mark W1EOF
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