[TowerTalk] coaxial for loops inside shack

K8RI K8RI-on-TowerTalk at tm.net
Tue Feb 21 23:27:44 PST 2012


On 2/22/2012 2:15 AM, Jim Brown wrote:
> On 2/21/2012 2:27 PM, Gene Fuller wrote:
>> How much power/SWR will RG-8X  handle
> POWER is not the only issue. SHIELDING can matter FAR more than power if
> you are doing a multi-transmitter operation.  Jorge -- are you doing
> more than one transmitter -- SO2R or multi-two?  If you are, using
> bigger coax with a very good shield can reduce interference between
> stations. All of my feedlines are either Heliax, CATV hard line, Belden
> 8213 (RG11), Belden 8237 (RG8), or a Commscope cable that's slightly
> better than LMR400.

That was basically the reason I went to the LMR 400 and 600 UF.  I 
wanted the better isolation and had lots of UF...like over a 1000 feet.
I've never liked Belden since lightning blew off the water proofing at 
the top of the tower and I ended up with water running out of the 
rig.    The damage was more to the desk than to the equipment and I 
realize Belden generally makes good coax, but that experience soured me 
on them.  I do have a 100 feet or so of 1/2" Heliax, but have found the 
1/2" to be too fragile and larger in the station would be a bit 
unwieldy.  I agree that the comscope would be a slightly better choice, 
but as I have rolls of both LMR 400 and 600 it wasn't "that" much better 
<:-))

73

Roger (K8RI)

> 73, Jim K9YC
>
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