Ron,
Thanks for the info both here on the radio today.
I too have a shack on the second floor so I'd love to see your grounding setup.
I have the option of locating my shack in my garage but that'll cost at least a
couple grand in climate control. The benefit there would be that it's on the
first floor and located near the breaker panel as well as the utility ground.
That way I could easily bond the grounds like you mentioned. If not my current
shack location is on the opposite side of the house as the utility ground.
I learn best by doing hands on things and seeing how things are hooked up and
routed. Maybe once we are out of the woods with COVID we could get together and
I could check out your setup.
Thanks for clarifying what was going on in that setup with the radiation coax.
Here's the diagram and article I was referencing:
https://palomar-engineers.com/tech-support/tech-topics/best-hf-end-fed-antenna
let me know if what we talked about rings true to what was discussed in the
article. The takeaway I got was that if you run the counterpoise system you
don't have to worry about compromising the performance of the antenna by
burying the coax. Am I on the right track?
--73,
Mike GiannaccioKI5LFZ
On Thursday, January 28, 2021, 12:13:34 PM CST, Ron Bosch via BVARC
<[email protected]> wrote:
Mike,I run the UnUn from Palomar for my EF Random. I started with one I
built, but it was not very good, and got worse with weathering. I changed to
the Palomar one, and have had no problems. I ran common wire instead of the
wire from Palomar and regret it. I have since acquired the same wire as listed
in your example from Palomar, and it is on my list to replace the wire I have
up now. Some things I have found to be very important to running an end fed
antenna:1. Station ground is critical, it NEEDS to be as close to the
transmitter as possible, and works better if you bond that ground rod to your
utility ground as well.2. I tried 2 counterpoises, direct ground from the
UnUn, and both. The best results are with both.3. You will need a tuner to
get the most band coverage possible. I have used both an autotuner and a
manual tuner. The autotuner will get you a match, the manual gets you an
almost perfect match.4. The NVIS performance of my antenna is nowhere near as
good as modelling suggests, and the DX is much better than the modelling
suggests for the height of my antenna. The combination of 1, 2, and 3 suggest
strongly that the dirt under my house is a very poor ground. Your results may
vary.
RonKE4DRF
On Thu, Jan 28, 2021 at 11:23 AM Gary Sitton via BVARC <[email protected]> wrote:
Mike:
I just installed a MyAntenna EFHW 40-10-2K wire antenna. I chose the 40
to 10 model as I do not use 160 or 80 meters. It is hung in an inverted V
configuration: the center at 30' and ends at about 10' from the ground. The
total length was about 63' and the final SWR was less than 1.5:1 on the the
phone bands except for 10 meters where it was 2:1. The modeI got was designed
for 1.5 KW peak and seems to be of excellent construction. There is a 7:1 UNUN
included in the package but I did not examined it. I would be glad to discuss
any other details.
73, Gary K5AMH
(713) 305-6765
1/28/2021 9:45 AM, Michael Giannaccio via BVARC wrote:
Does anyone have any experience with this product:
https://palomar-engineers.com/ferrite-application-experts-2/Bullet-End-Fed-500-1500-Watt-Antenna-1-8-61-MHz-55-203-FT-p74356626
Or this product:
https://www.hyendcompany.nl/antenna/multiband_40201510_m/product/detail/2/HyEndFed_4_Band_Black_Clamp_MK3#prod
An end fed antenna is the best fit for my property. I can easily run the 71
foot model as either an inverted L sloper or as a regular sloper. The highest
point will be 18-20 feet and the low point will be around 6-7 feet.
I have a few questions about this antenna as well making a DIY 20 meter delta
loop. If anyone is willing to give me a few minutes of your time to pick your
brain off this thread that would be much appreciated.
-- 73,
Mike Giannaccio KI5LFZ
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--
Gary Sitton, K5AMH
[email protected]
SDR/DSP Consultant,
"Have FFTs, Will Travel."
________________________________________________
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BVARC mailing list
[email protected]
http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org
________________________________________________
Brazos Valley Amateur Radio Club
BVARC mailing list
[email protected]
http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org
________________________________________________
Brazos Valley Amateur Radio Club
BVARC mailing list
[email protected]
http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org
