[TowerTalk] Mosley Antenna Question

[Mike Ryan]

Norm, You could be spot here....some of the newer low loss cables were 
probably not around when some of these antennas came to market, so the 
suggestion was for RG-8 or 213.  But I would suspect that as long as the 
cable is 50/52 ohm it should be fine.  And it would not pay to cut anything 
for an exact frequency based on the velocity factor, because as soon as you 
change bands all that work goes out the window. I think the plan for this 
guy is to use DX Engineering's LMR400 clone after my pigtail from the 
antenna and rotor loop.  Whatever he provides is what I will install at this 
point.  Thanks for the response.  - Mike

-----Original Message----- 
From: Cox, Norman R.
Sent: Tuesday, February 17, 2015 1:02 PM
To: Mike Ryan ; towertalk at contesting.com
Subject: RE: [TowerTalk] Mosley Antenna Question

   I can't exactly remember, but I think the main difference in RG-213 and 
RG-8 is that one has definite MIL standards and the other (RG-8 I think) had 
more-or-less standards, but varied by manufacturer.  I imagine that, at the 
time the antennas were introduced, 213 and 8 were the two most used by 
amateurs, the antennas were evaluated with those, and so that's what they 
recommended.   I would suspect that newer, low-loss cables would work ok, 
but you might find the characteristics changed slightly (due to the lower 
loss).

Norm
KE0ZT


________________________________________
From: TowerTalk [towertalk-bounces at contesting.com] on behalf of Mike Ryan 
[mryan001 at tampabay.rr.com]
Sent: Monday, February 16, 2015 11:54 PM
To: towertalk at contesting.com
Subject: [TowerTalk] Mosley Antenna Question

Over the years I have heard stories of unexplained failures with Mosley 
antennas which were equally unexplained as having to do with the selection 
of certain coax cables. One recent incident was with a local here that had 
trouble getting a PRO 67 to ‘cooperate’ only with the use of RG 213 cable. 
Recalling this story, I have been asked to assist with the install of a 
Mosley TA-53, 5 band beam on a 14ft boom.  NOTHING in the manual (which is 
dated) suggests this but an on-line review of the TA-63 and a peek at a 
manual found on-line also seem to suggest that the ‘recommended coax is 
RG213”.  Any comments on the validity and reason for the use of JUST RG-213 
and not some other 50/52 ohm cable?  Thanks....  - Mike
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