Except for my 6M yagi, all of my antennas are non-resonant antennas.
My favorite is the 256 ft center fed wire {resonant at 1.825 MHz} with
a balanced feed. The balanced feed runs from the feed-point on the
antenna all the way to the hybrid Guanella 4:1 balun that sits on the
shelf just above the KAT500. The coax jumper from the balun to the
KAT500 is about 12" in length. Thus the balanced line comes in all the
way to the operating position. This configuration will work all
bands, 160M - 6M with ease. And there are NO RFI issues with the KPA500
and the KAT-500 at 500 watts.
I find most hams cut an antenna length by formula, leave a few inches to
trim, and then trim for best SWR. This does not make a resonant
antenna. A resonant antenna is resonant depending on its electrical
length based on frequency. SWR and Impedance should be addressed by
means than trimming the length. Height above ground affects impedance.
73
Bob, K4TAX
On 10/25/2019 3:37 PM, Wes wrote:
Sorry about that mess; that will teach me to try and respond with an
iPhone.
What I was trying to say is that I run a KPA500 and KAT500 into
non-resonant antennas on all of the WARC bands and still manage to
crack pileups. On 12 and 17 meters I tune my tiny OB7-3 Optibeam
tribander. Of the current DXpeditions, I've worked VP6R on 19 slots
and I work FT8 with great reluctance. I've worked 5K0K on 14 of 25
slots without using FT8. For the recently completed ZK3A expedition I
worked them of 24 of 37 slots and was on Clublog's stats number 20 in NA.
I'm pretty sure that I never have the commanding signal in a pileup.
BTW, I use a K3S without a second RX and I don't have a separate RX
antenna for 160, things everybody knows you must have to work DX.
IMHO, knowing how to use the hardware you have is more important than
having more hardware.
Wes N7WS
On 10/25/2019 9:00 AM, Wes N7WS wrote:
I run a KPA500 and KAT500 into an Ppitbe
Sent from my iPhone
On Oct 24, 2019, at 1:24 PM, Michael Walker <va...@portcredit.net>
wrote:
Hi Eric
I think you are asking a lot for a tuner to run at any power into a
non-resonant antenna and break a pile up. :)
You would actually have better success with a 12M dipole then trying
to get
a non-resonant beam to direct your signal.
If I was in your shoes, I would quickly toss up a 12M dipole with some
string and bubble gum as you would have a much higher radiated signal.
Mike va3mw
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