Topband: Silent Feedline for RX antennas

[Pete Smith]

At 08:18 PM 8/25/02 -0500, W0UN wrote:
>RG-22/U,   RG-22A/U,   RG-22B/U are the designators for the
>Twinax cable that looks like RG-213 (RG-8).   It is 95 ohms
>impedance.  Proper connectors are harder to find surplus
>than the coax--but can be bought for $20+ if I recall properly.
>
>RG-22B/U is the non-contaminating jacket version.   If I were
>buying surplus cable I would insist on this version.

I think I may have confused things by throwing the trade name "Twinax" into 
the equation.  The stuff we used with Wang computers and WP gear was more 
like 2x RG59, 2 1/4 inch coaxial cables in one molded jacket.  I don't know 
what the impedance was.  It was terminated with ordinary BNC or TNC 
connectors, and was reasonably flexible -- better in that respect than a 
single RG-213.  Some of it was Teflon jacketed, and approved, I believe, 
for installation inside drop ceilings (at least, that's where ours was).


73, Pete N4ZR
Sometimes a tower is just a tower