[amsat-bb] Re: Where can I buy pre-made feedline?
nate at natetech.com
Thu Dec 6 11:59:06 PST 2007
Edward Cole wrote:
> I have just assembled PL-259's without soldering the shield and they
> seem to work (tested only with SWR meter). But without solder the
> contact will deteriorate over time as the copper braid oxidizes. Not
> so bad if only used for inside connections. Since compression is
> used with other style connectors this may work fine. I would just be
> sure to thoroughly wx-seal any connectors that will be outside. Then
> time will tell if this method is good. Soldering all the holes in
> the PL-259 seals the connector from moisture intrusion (if taped).
Not soldering the braid seems to me like it could cause a big problem if
you use a proper service entrance panel and polyphasers for lightning
protection. You need a good shield connection for grounding. Granted,
not many hams do the grounding/protection "properly" at home, but then
again -- a lot of hams lose gear to lightning that probably wouldn't be
lost if built properly.
It would also seem that if the shield has a questionable ground, you
wouldn't get as much protection from other high RF noise sources in the
local vicinity from the shield.
The partially or un-grounded shield could also become an IM generator in
the form of metal-on-metal contact that's not solid. Not a problem in
most home installations, but bad practice in general.
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