Rick et all
I have changed the Subject line rather than further hijack Tree's
original thread
I have a "T" Radiator 60' high with flat top of the T, 80' long. Next 4
elevated non resonant 90' radials at 6ft.This gets me to ~22.5 ohms,
2.25:1 matching transformer out of Sevick to go to 50ohms . I then tune
the system to resonance with a tapped inductor in series with the radial
side of the feed, The taps are relay selected . Taps selected for a dip
at 1816, 1840 , 1860, 1880, 1900 and 1920. SWR 1.3:1 from 1.8 to 19.5
which the my KPA1500 and Alpha 9500 both love.
Dave
NR1DX
manuals@artekmanuals.com
On 2/27/2021 3:23 PM, Richard (Rick) Karlquist wrote:
On 2/27/2021 11:01 AM, Tree wrote:
My general comments about the contest.
Back about 15 years ago - it seemed like there was plenty of activity
above
1900. AA1K spent most of the contest in 1999 kHz. Maybe it was
conditions
- but it seemed to be a lot less going on this year above 1.9 MHz. I
had
I thought about retuning my TX vertical somewhat higher temporarily
just for this contest, but I was thinking that many stations would not
have the capability to go above 1.9 MHz, so CQ'ing up there would have
limited success. Without changing from my "normal" CW setting, I can
get away with going up to almost 1.9 MHz before the Alpha 9500 complains
too much.
What is really needed is a remote switched tuning network that would
divide the band into eight 25 kHz segments. Then I could S&P the high
frequency stations on a demand basis. It is on my "someday" list of
things to build. I already have built one for 80/75 meters with 8
segments, so the design is in my head.
Rick N6RK
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