Topband: Broad band antenna approach for 160 Contesting

[Artek Manuals]

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 at 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
> _________________
> Searchable Archives: http://www.contesting.com/_topband - Topband 
> Reflector 
-- 
Dave Manuals at ArtekManuals.com www.ArtekManuals.com

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