Put it in a oven and see if it will stand 150-200 F
degrees without melting. I made a chimmney for
my 8877 amp out of neopreme sheet
about 1/8" thick and had no problems.
Mark WB8JKR
On Mon, 9 Mar 1998 18:50:23 -0000 "Frank & Barb Ayers"
<LOMAX1@prodigy.net> writes:
>Got a question about do it yourself chimneys. Having determined that
>the
>oil cap will do just fine in my power supply, I'm now setting my
>attention
>on the amplifiers that it will power. I have a Svetlana 4CX800 and
>socket
>that I'm planning on using on 6 meters. There is, however, no readily
>available chimney for it. RF parts lists one made of teflon but
>they're out
>for a few months. I know I could wrap one up out of teflon sheet, but
>in
>discussing this with a friend he told that someone he knew made a
>chimney
>from a small 'microwave safe' freeze and heat container. I got one,
>put it
>in my wave along with a glass of water (to keep the wave from arcing)
>and
>ran it for 10 minutes. The water in the glass was boiling but the
>container
>was pretty much room temp. The dielectric abilities of the container
>seem
>okay, as my 2500 v supply did nothing to it. So - the question:
>anybody
>have first hand experience with this?
>I have a few chimneys for the 4CX1600B that I'm planning to use on 2
>meters
>and I suppose I could always cut one of those down. They're made of
>Nomex
>and are sorta like large toilet paper tubes. I'd prefer not to have to
>do
>that tho.
>
>Frank
>W2FCA
>
>--
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>Problems: owner-amps@contesting.com
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>
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