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Old October 3rd 17, 10:32 AM posted to rec.radio.amateur.moderated,rec.radio.amateur.antenna
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Posts: 117
Default QRZ Forums - Antennas, Feedlines, Towers & Rotors for Tuesday 3 October 2017

Antennas, Feedlines, Towers & Rotors

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Amphenol grounding assembly

Posted: 02 Oct 2017 07:40 PM PDT
https://forums.qrz.com/index.php?thr...sembly.583310/

I have had this "forever" but just got around to looking at it closely.
The item is an assembly designed to get the shield of a coaxial cable
grounded. There is "spark gap" assembly visible in the female end.



The only name, on the device, is Amphenol and that is on the male end of
the assembly (PL-259 end).



I have looked at the present Amphenol catalogs and cannot find such.
However, since I have had this for many years, the product may have been
discontinued....



Amphenol grounding assembly

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Cross-polarized, circular polarized -- can it go horizontal also?

Posted: 02 Oct 2017 05:45 PM PDT
https://forums.qrz.com/index.php?thr...l-also.583231/

Ive been looking at some different yagis for 2m and 70cm. Ive seen the
cross-polarized antennas and also the circular polarized ones, and not
overly familiar with either.



Depending on the activities around the year, I find a lot of 2m simplex and
2m SSB activity. Our area has a 70cm repeater that is vertically
polarized, and theres an upcoming 432 sprint this week. So it might make
sense to have the versatility to switch polarizations.



Looking at the Cushcraft 2m Hi-Lo cross yagi, it...



Cross-polarized, circular polarized -- can it go horizontal also?

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Hustler 6BTV on Sal****er - Tuning Issues

Posted: 02 Oct 2017 05:36 PM PDT
https://forums.qrz.com/index.php?thr...issues.583300/

I recently installed a Hustler 6BTV on my floating dock in sal****er. (see
pic below) I followed the DX Engineering guide and adjusted the traps to
optimize SWR at the center of the bands. All the traps had to be moved
down because of this great sal****er ground. Unfortunately I am out of
options for tuning the 40 meter band.



There is a nice resonance point at 7.000 Mhz but I really would like to
have this closer to 7.238MHz in the middle of the phone band. I am seeing
an SWR of 5.3...



Hustler 6BTV on Sal****er - Tuning Issues

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Want To Build A Resonant 40/20M Portable Dipole

Posted: 02 Oct 2017 05:17 PM PDT
https://forums.qrz.com/index.php?thr...dipole.583286/

using 18ga speaker wire. I plan to run just two legs from the center
connector with one of the dual wires cut to 20 meters on each leg. Im
trying to avoid a fan dipole.



Kind of like this:



--------======+=====--------



Has anyone tried this and will it work?

Do I need to calculate different leg lengths that are different from a
standard dipole?



Should I just put and alligator clip between the 20M and 40M section of
each leg(not preferable)?

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Need help with Alpha Delta DX-A

Posted: 02 Oct 2017 05:11 PM PDT
https://forums.qrz.com/index.php?thr...a-dx-a.583326/

Howdy Folks,

Need some info. My G5RV got destroyed during Irma so I bought a DX-A

Now I made the mistake of reading the install instructions, lol I have a 50
Rohm tower and have a hex beam on top

So the instructions say must be mounted on a tower under a full size HF
antenna

Then a note, a hex type beam will not work

The dx-a uses the hf antenna as a cap hat

So I have to ask, has anyone installed a dx-a under a hex beam and had it
time up Ok?

Or should I send it back to rho

Thanks and 73...



Need help with Alpha Delta DX-A

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Using same ground radials for different radiators?

Posted: 02 Oct 2017 08:10 AM PDT
https://forums.qrz.com/index.php?thr...iators.582608/

OK, please dont tear me up too much on this question....



I currently have a nicely done 6btv ground mounted vertical with about 60
radials. I have great success with this antenna but Id like to start
fiddling with some gain, specifically, towards Asia the last trove of
untapped DXCC entities (for me at least)



I cant do a yagi, steppir, or hex beam but I can do wire antennas...



Im thinking about a true end-fed longwire antenna with lobes at the end of
the radiator. When I think about...



Using same ground radials for different radiators?

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160m Receiving Loop Aerial

Posted: 02 Oct 2017 02:29 AM PDT
https://forums.qrz.com/index.php?thr...aerial.582936/

I work a lot of DX on 160m . . . but sadly have never had room for a
Beverage receiving aerial.



And of course, the ever increasing problem on 160m is the noise from local
domestic equipment.



So . . . I thought Id make a receiving loop.



Im not sure why so many people make their loops out of copper pipe or
co-ax, and just a single turn. Fine, you may need to do that if you want
to make a "Magnetic Loop" transmitting aerial . . . but I figured for
receive Id be better off...



160m Receiving Loop Aerial


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