Do a search on Google for coaxial cable specs. There you will find a
website called RF Cafe. It is the first one on the Google list. You are
looking for ST(Solid Teflon dielectric. 303 is not the only one that will
fit your need. There's 142A/B, 141A, 400, 401, etc.
Bob W6TR
----- Original Message -----
From: "ANTHONY JAPHA" <tjjapha@earthlink.net>
To: <amps@contesting.com>
Sent: Sunday, July 20, 2008 9:52 AM
Subject: [Amps] Coax needed
> The directional coupler I'm building calls for a couple of short pieces of
> RG-303, apparently an obsolete teflon-insulated coax. I haven't been able
> to find any of it. I need only about 6 inches (yes, inches!) of it. It
> is used to carry the power--just 100 watts in this application--through
> the toroid cores in the pickup unit. The coax simply runs through the
> middle of the toroids, which have a winding on them. The cores are small
> T68-2 types, so the coax must have a pretty small diameter. RG-58 is a
> tight fit.
>
> Anyone have 6" of the RG-303 lying around to sell; or any suggestions for
> a substitute coax?
>
> Tnx and 73,
> Tony, N2UN
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