Okay, after many requests, on and off list, I disconnected the 43' T 160m
antenna at its feed point and for good measure I disconnected the coax
feedline from the system too.
It made a pretty substantial difference in the measurements. The 1.5 SWR
range is now only about 35 kHz wide but the 2.0
Both Merv and Guy are correct here. Perhaps this antenna doesn't ever
have a chance at being any good due to the suburban area and lot size
that I'm constrained by.
Within a 250ft radius (huge!) there is as follows: 80m dipole, 40m
dipole, 30m dipole, 20m dipole, 15m dipole, 20m yagi, and the
Regarding the choke construction and implementation. Mike and I have had an
offline exchange, with pictures, and I think we have agreed that the choke
has been constructed properly per the newest K9YC specifications using a
2.4" Type 31 Fair-Rite toroid and 18 turns of RG400.
Also, the 150' long
Hello,
Per many people's recommendations I added 800ft of radials today. That is 8
x 100ft each. It made a difference on the analyzer which I'll summarize
below. It was dark when I finished but here are a few data points. I think
it is better. The wide SWR curve still bothers me but the
Hello,
I borrowed a RigExpert analyzer and was able to take measurements that
folks were asking for without AM station overload. I also built the K9YC
160m choke (18 turns of RG58 on a type 31 2.4" toroid). That choke is at
the feed point of the vertical. The analyzer was connected directly after
Hi Mike,
Yes, it is a space issue. The presentation I was referring to is
http://audiosystemsgroup.com/160MPacificon.pdf where it has a table the
references a paper by K3LC that has "Optimum Use of Wire On/In Ground Over
Average Soil" and it lists 12 radials at 42' each to essentially use a 500'
Thanks to everyone that has written to me on the reflector and via email.
I've read everything you've written and hopefully your efforts have helped
me or guided me towards getting this antenna working better.
I've made some changes, bought some equipment/parts and built some stuff
per all of
Thanks again everyone. I've read all your suggestions and advise and
although I won't be able to make some of the more difficult (or impossible
at my site) changes there are a few things I'm willing to try.
I read the w0btu.com webpage and I'm not really that far off from that
setup. Minus that
Hi Rob,
You ask some good questions and make some interesting observations.
Nope, it is the same radial system. I don't have a reasonable way
(time/money/effort) to create a whole new 50-60 wire buried radial system
for this experiment. I just disconnected the 43' vertical from the radial
On Sat, Dec 29, 2018 at 8:59 AM Grant Saviers wrote:
> Problem #1. The swr indicates about a 140Khz plus < 2:1 bandwidth (2 *
> 1880-1810) which implies a high radial resistance. Are the elevated
> radials fully insulated from trees, not contacting foliage, etc? Add
> three more.
> Problem #2.
:1
Todd - NR7RR
On Fri, Dec 28, 2018 at 7:30 PM Todd Goins wrote:
> Charlie,
>
> Yeah, I know the 100w is not ideal. This is night #2 with the elevated
> radials on the 100' vertical. I spent every day last week trying to use the
> 100' vertical against my buried radial field.
rinya.net/g3txq/chokes to see what I mean.
>
> A very, very good common mode choke is the one I have on mine, from
> http://audiosystemsgroup.com/RFI-Ham.pdf. There is no better material
> written on this subject, either in print or on the Internet.
>
> 73, Mike
> www.w0btu.com
>
Sorry, I wasn't completely clear in my post. The elevated radials are not
connected to the buried radial field. They are two separate entities. Now
the elevated radials do sit above or cross some the buried radials in some
places so I'm sure they do interact but they aren't directly connected
I originally started this thread and I want to once again thank everyone
who provided input and advise both privately and on the reflector.
So the 100' tall vertical with the 30' horizontal loading wire works
**horribly**. I have about a week with it now every evening and it is much,
much poorer
> will need receiving one (ones). And do not expect huge EU pile-ups with
> your 100W, HI
>
> 73, Mirko, S57AD
>
> V V pon., 17. dec. 2018 ob 21:55 je oseba Todd Goins
> napisala:
>
>> Hello,
>>
>> Yes, I'm a 160m newbie but have been licensed and active
Hi Gary,
Thanks for the help. I got the new wire in place roughly as you described.
It is a few feet lower to give good clearance from the anchoring branch.
It doesn't work very well. Last night it was much poorer on receive and
transmit than my existing 43' vertical setup. I'm not sure what to
Hello,
Yes, I'm a 160m newbie but have been licensed and active since 1990. I have
CW/Phone experience on HF but I'm just getting my feet wet on 160m. I
participated in the ARRL 160 CW contest and had a great time. I will also
be particiapating in the Stew and the CQ contests in January. I'd
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