Date: Tue, 12 Jan 2010 20:20:34 -0500
From: "David H Craig" <davidhcraig@verizon.net>
Subject: Re: [Amps] which HV connector to use?
C connector, HN, or even RG214 with connectors will work fine
(commercial TX often use RG214 for 8kv in the States). Otherwise buy a
Millen connector & use HV cable- about $20-35 US on Ebay, but cheaper at
hamfests. If you use one of the RF coax connectors, just make damn sure you
mark it as such in the event an unknowledgeable person decides it it an RF
line...
See you soon on 50 MHz TEP!
73 Dave N3DB
## Why 214 ? It has a double braid vs single braid of 213 u. 214 is
bigger OD, and harder to install a pl-259 on.
Are these broadcast TX using UHF pl-259 /so-239 pairs.. or something else??
## rauch said he hi pot tested RG-58-u.. and could not draw any leakage
current... even with 15 kv. [ limit of his hi -pot]
Measures hi pot limit is 30 kv... and again, no leakage current with RG-58-u
## Although they rate 393 Teflon coax at 7 kv.... if u actually hi-pot
tested it... I bet it would take 80 kv to draw any leakage current.
## I'm not worried abt using coax for B+.... but using coax connector's on
each end. I don't think I would want to trust a UHF pair,
even with Teflon connectors. The B+ would just blow right up the crack,
where the 2 x Teflon surfaces mate... an/or... it would arc on the
backside[inside]
of chassis, on the SO239.
## perhaps using plane 213-U.... but with the center conductor + braid
separated with a big crotch, and stakon crimp connectors would work?
then machine screw down both the braid and center conductor... and each end of
the cable. Electrical box's now have adjustable diameter strain relief's.
These things are slick... just twist em, and they cinch down on the cable, and
pinch it tight.
## I'm not impressed with the Alden HV connector's either. No pos lock on em.
They come with HV cables attached on both halves.. and usually too short.
later........ Jim VE7RF
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