Re: [amsat-bb] Exciting Coax

23 Jan 2018

      I've got hardline for my 60' runs on 70cm, and 1.2 ghz.  Really works a
LOT better than 9913, especially with the water problems.  Besides at
the connectors, the local squirrel population likes to gnaw at stuff,
and all it takes is one small chew to ruin the entire run.  With
"regular" (solid innards) coax, the wound can be taped over with
electrical tape, since they don't seem to like the braid.  Even the
smallest nick in 9913 will eventually be fatal.
Greg  KO6TH
Bob- W7LRD wrote:
...
For 2 & 70cm I use LMR400.  LMR is better (in my opinion), in that it's more flexable, 9913 can get water inside.  Unless coax connectors are super sealed.  
73 Bob W7LRD
...
On January 22, 2018 at 6:03 PM anderson58625 anderson58625@gmail.com wrote:
Reading the subject line, I may have somehow mixed sarcasm with a potential
pun (eye of the beholder!) <grin>.  Sorry for that.
I seek to avoid investing in a set of cable producing hardware (or assembled
cables) which I will regret later.  I am hoping to get some guidance
regarding coax for:

 IF patch between equipment (male-male BNC's)

 2m feedline (N-connectors) (<50')

 70cm feedline (N-connectors) (<50')

  A later potential for feedline carrying microwave frequencies

(>1GHz)
The frequency & loss-rate charts for coax are informative, but I'm not sure
I'm seeing which connectors will fit what cable brand/types.  With the
variables of loss, dimensions, flexibility, and potential proprietary
crimping systems, etc., I don't have enough experience or information to
confidently make an online materials order.  Things were much easier down
here with just HF frequencies, RG-213, and good quality (weather protected)
PL-259's! <grin>
For IF patch cables, I figure these are conveying HF so the cable type/loss
at 1-3' isn't very important.  But, there is also shielding:  A
consideration?
.       Any thoughts on IF cables?
.       Plus, I've never attached a BNC to a cable.  Easy?  Avoid it?
.       Plan on a new crimper/die?
.       Or, if premade would be cheaper (just a few IF patch cables), any
quality sources to recommend?
For the 2m & 70cm feedlines, I know flexibility may be a consideration on
rotating/elevating masts.  Of course, I'm sure a rigid feedline may be
superior elsewhere, but I am not at that point yet.  Still, advice on that
subject is gratefully appreciated.  I need to provide good questions to hope
for good answers, so what feedline you would recommend for:
.       Reasonable flexibility/portability
.       2m-23cm
.       Modest power
.       <50'
.       For use with n-connectors
The benefit of you knowledge and experience is much appreciated.
73
Mark W9AT

Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available
to all interested persons worldwide without requiring membership. Opinions expressed
are solely those of the author, and do not reflect the official views of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb

Re: [amsat-bb] Exciting Coax

Greg D