Fw: Fw: [HBR] coil shields

Sun, 14 Apr 2002 15:12:53 -0400

Maybe some thin walled tubing... fence top rail tubing?
Might not look too bad if you could cut it square and shoot
it with aluminum paint. How far from the coil does the shield need
to be?
John 

PS: The "new" HBR11 works (albeit with some ferocious hum that's
modulating the CW...which brings me to a question:

What's an acceptable ripple on the B+ line? I am seeing about 10V PTP
AC on top of B+..... I did jumper in replacement caps, but made no difference.
I think there's a lot of grounds that "arent" . Off to go tighten up a lot
of screws!

At 01:17 PM 4/14/02 -0500, you wrote:
>They used to have manufactured coil shields ...James Millen ? 
>but would be impossible to find today. Can't think of really thin 
>aluminum that size ....yes, I can.....soft drink cans (maybe too 
>thin). Take the paint off with MEK ? flatten the base and cut a 
>hole in it for the socket. Figure out some way to dull the edge 
>a little ...maybe "glue on" split wire insulation or "roll" it. If you 
>need a larger shield, "Foster's" makes a larger one.  Other 
>than that, take thin aluminum sheet stock, bend it over a mandril, 
>and pop rivit it into cylinders. Tabs on the bottom for mounting.
>
>73s  Kees K5BCQ
>
>
>--------- Forwarded message ----------
>From: Helmut Usbeck <[email protected]>
>To: <[email protected]>
>Date: Sun, 14 Apr 2002 12:56:59 -0400 (EDT)
>Subject: [HBR] coil shields
>Message-ID: <[email protected]>
>
>
> I did a little touring around the web last night looking for a source of
>shields for plug in coils.  Didn't find anything.  The first thought I
>had
>was was Campbell soup cans but they look pretty mickey mouse to me after
>sitting one on a receiver chassis.  Anyone ever try making some that have
>that professional zing to them.
>
>Regards,
>Helm.  WB2ADT
>
>
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