[TowerTalk] Six meter balun

[john at kk9a.com]

The 50MHz power average rating for RG142 is several kilowatts, why do you
think it is inadequate?  If it is a balun problem it is most likely
connection related.

John KK9A



Dave Sublette k4to wrote:

My six element 6M LFA is showing a high SWR and severe loss of receive
signal.  This happened this afternoon as I was working the band with 500
watts from my KPA500.

To this point, the antenna was very nicely matched with a 1:1 SWR over
almost 1 MHz of bandwidth. The antenna is home brew and I made the matching
balun per the instructions from K9YC using two toroids with six turns each
of high quality teflon insulated, double shielded silver braid. I think it
was RG142 purchased new from a reputable vendor in Tennessee. It has worked
perfectly at the 100 watt level for three or four years.  I had looked at
the specs on the coax and thought it would be good for 500 watts.
Evidently not.


73,

Dave, K4TO