RF choke for SB220 (RFC-5)

[W6CUX]

Brian,
Joe was not using it in the plate choke position -- it is beyond the plate
coupling. It is just there in case the coupling cap is slightly leaky to
prevent the high voltage from showing up on the antenna. A similar RFC is
used on most of the Heath SB amplifiers.

73, Stu W6CUX

----- Original Message -----
From: "Brian Carling" <bcarling at CFL.RR.COM>
To: <HEATH at LISTSERV.TEMPE.GOV>
Sent: Saturday, June 26, 2004 3:44 PM
Subject: Re: RF choke for SB220 (RFC-5)


> Hi Joe,
>
> If I were you I would NOT try a plate choke that is only rated at 70 mA in
a Heath
> SB-220. It will open up in no time with that amplifier
>
> If you are using it at some low level stage like a grid circuit or the
osc. plate, then
> it may do OK.
>
> On 25 Jun 2004 at 10:46, joe wrote:
>
> > Found a RFChoke in Mouser catalog and going to try it
> > and see how it works out.  its part nr 542-70F103, 1000 uf,
> > max ohms 24.0 and max current is 70ma ...
> >
> > Thanks to all!
> >
> > 73 de Joe w0tut
> >

-----------------------------------------------------------
Products bought, sold or traded here is the responsibility of the
parties involved.  This list and the City of Tempe are not responsible
for losses or misrepresentations of any kind.  Buyer beware!

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
To post - HEATH at LISTSERV.TEMPE.GOV
Archives - http://interactive.tempe.gov/archives/HEATH.html