[Elecraft] open wire feeders

K8TB k8tb at bosscher.org
Sat Dec 31 15:37:40 EST 2011


    I have a balanced fed balanced length dipole. The dipole sits atop 
40' of rope guyed fiberglass pole. 55 feet on each side. About 45 feet 
of 450 ohm balanced line comes into the far end of the back side of the 
house into one of my 7 , um, junk/storage rooms! There I have a 4:1 
balun, which then hits a LDG RT-11 antenna tuner. The RT-11 is a remote 
controlled tuner.  A little control sits in the shack. I tap the tune 
button on the K3, tap the tune button on the little LDG box and the 
tuner works.

     I don't know what the experts or Enzec says about this antenna, but 
I'll tell you that it works, and very well. So much so that I have a 
second copy of it in a plastic box in the garage that is used on field 
day. Anyone who uses that antenna at field day is very impressed. I have 
about 60 feet of rg-8x from the shack to the remote antenna tuner. Zero 
RF in the shack, ever. No chokes on any feed line. And it has worked K5C 
and VP6DX and others on all bands from 80 to 10. I have no idea how the 
success ratio is divided between the antenna and K3!

     Now, maybe we can build a simple interface to the KAT500 tuner to 
convert its need to communicate to the K3 to a balanced rs-485 
configuration. That would allow us to remote the tuner hundreds of feet. 
I would then use that at my remote base site.

     But that antenna does work.

     Tom K8TB






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