Topband: Topband Digest, Vol 219, Issue 24

richard at rodsley.net richard at rodsley.net
Wed Mar 24 12:45:48 EDT 2021


Roger

I think your namesake Roger VE3CZ ex G3RBP has a vertical dipole.

Richard

-----Original Message-----
From: Topband <topband-bounces+richard=rodsley.net at contesting.com> On Behalf
Of topband-request at contesting.com
Sent: 24 March 2021 16:02
To: topband at contesting.com
Subject: Topband Digest, Vol 219, Issue 24

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Today's Topics:

   1. NQ9E - QRM (W3HKK at roadrunner.com)
   2. New Subject: 160M array feedline question (Roger Kennedy)
   3. Re: New Subject: 160M array feedline question (W7TMT - Patrick)
   4. Re: New Subject: 160M array feedline question (W7TMT - Patrick)
   5. Re: NQ9E - QRM (List Mail)
   6. subscription cancel KI7M (Terry Burge)
   7. Re: subscription cancel KI7M (fmoeves)


----------------------------------------------------------------------

Message: 1
Date: Tue, 23 Mar 2021 16:38:13 +0000
From: W3HKK at roadrunner.com
To: "'topband at contesting.com'" <topband at contesting.com>
Subject: Topband: NQ9E - QRM
Message-ID: <43211f2d50890af85ac09941447cf326b6170c74 at webmail>
Content-Type: text/plain; charset=UTF-8

sosunds like you may have power line noise which wont go away, but may vary
with weather.

I had similar problems which I tracked down with an AM radio, and driving
along the roads around my house til I located the likely culprit, a
continuously arcing lightning arrestor on a pole about 0.7 miles away. 

I called the utility and met their crew at the site. Turns out the problem
wasnt at the pole I thought it was, but one pole over. The utility crew
heard the arcing and changed the arrestor. No more problems.

Arrestors can only take so manch discharges. In my case, it didnt clear, and
remained steadily arcing 7/24. That costs the utility $$$ in wasted power,
so they were happy for me to help them find it.



------------------------------

Message: 2
Date: Tue, 23 Mar 2021 22:33:53 -0000
From: "Roger Kennedy" <roger at wessexproductions.co.uk>
To: <topband at contesting.com>
Subject: Topband: New Subject: 160M array feedline question
Message-ID: <59DB7AE806B74210AE3DF4C24174B2C7 at Packard>
Content-Type: text/plain;	charset="us-ascii"


Guy (K2AV) - I really liked your explanation about the function of a radial
field on a 160m vertical . . . and how the radials don't actually radiate.

But I've often thought about the other extreme . . . I have a homebrew 2m
Ground Plane on top of my mast . . . just a quarter wave vertical . . . and
3 quarter wave radials sloping down about 45 degrees.

Now if those radials were vertical, it would really be a vertical Dipole . .
. i.e. the radials would be radiating.  Whereas if they were horizontal, I
guess they wouldn't be.

You get my question . . . what really is the difference between the 3
different radial situations?

And here's another question . . . rather than all the issues of radials and
matching, has anyone ever used a Vertical Dipole on 160m ?

Sure, you're not going to have a 260 ft vertical . . . but suppose you had a
100ft support, so that you could have 50 ft vertical legs either side of the
coax feeder, and then just bend the legs at right angles at the top and
bottom to make up the length (linear loading) - maybe running in opposite
directions.

I would have though that would be quite an efficient antenna?  And
presumably (just like any dipole) it would work even better if the ground
underneath it was very poor (in my opinion)

Roger G3YRO




------------------------------

Message: 3
Date: Tue, 23 Mar 2021 22:41:34 +0000
From: W7TMT - Patrick <W7TMT at outlook.com>
To: Roger Kennedy <roger at wessexproductions.co.uk>,
	"topband at contesting.com"	<topband at contesting.com>
Subject: Re: Topband: New Subject: 160M array feedline question
Message-ID:
	
<MW2PR1501MB1978AEE05F3B32D72305B042F1649 at MW2PR1501MB1978.namprd15.prod.outl
ook.com>
	
Content-Type: text/plain; charset="us-ascii"

Called a Double L. This is the earliest article on it I remember. Others out
there as well.

http://www.yccc.org/http://www.yccc.org/Articles/double_l.ht/double_l.htm

Patrick, W7TMT


________________________________
From: Topband <topband-bounces+w7tmt=outlook.com at contesting.com> on behalf
of Roger Kennedy <roger at wessexproductions.co.uk>
Sent: Tuesday, March 23, 2021 3:33:53 PM
To: topband at contesting.com <topband at contesting.com>
Subject: Topband: New Subject: 160M array feedline question


Guy (K2AV) - I really liked your explanation about the function of a radial
field on a 160m vertical . . . and how the radials don't actually radiate.

But I've often thought about the other extreme . . . I have a homebrew 2m
Ground Plane on top of my mast . . . just a quarter wave vertical . . . and
3 quarter wave radials sloping down about 45 degrees.

Now if those radials were vertical, it would really be a vertical Dipole . .
. i.e. the radials would be radiating.  Whereas if they were horizontal, I
guess they wouldn't be.

You get my question . . . what really is the difference between the 3
different radial situations?

And here's another question . . . rather than all the issues of radials and
matching, has anyone ever used a Vertical Dipole on 160m ?

Sure, you're not going to have a 260 ft vertical . . . but suppose you had a
100ft support, so that you could have 50 ft vertical legs either side of the
coax feeder, and then just bend the legs at right angles at the top and
bottom to make up the length (linear loading) - maybe running in opposite
directions.

I would have though that would be quite an efficient antenna?  And
presumably (just like any dipole) it would work even better if the ground
underneath it was very poor (in my opinion)

Roger G3YRO


_________________
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector


------------------------------

Message: 4
Date: Tue, 23 Mar 2021 22:48:13 +0000
From: W7TMT - Patrick <W7TMT at outlook.com>
To: Roger Kennedy <roger at wessexproductions.co.uk>,
	"topband at contesting.com"	<topband at contesting.com>
Subject: Re: Topband: New Subject: 160M array feedline question
Message-ID:
	
<MW2PR1501MB1978FA43CCB1E576300872C4F1649 at MW2PR1501MB1978.namprd15.prod.outl
ook.com>
	
Content-Type: text/plain; charset="us-ascii"

Ooops, sorry about the cut and paste error. This link should work.
http://www.yccc.org/Articles/double_l.htm



________________________________
From: Topband <topband-bounces+w7tmt=outlook.com at contesting.com> on behalf
of W7TMT - Patrick <W7TMT at outlook.com>
Sent: Tuesday, March 23, 2021 3:41:34 PM
To: Roger Kennedy <roger at wessexproductions.co.uk>; topband at contesting.com
<topband at contesting.com>
Subject: Re: Topband: New Subject: 160M array feedline question

Called a Double L. This is the earliest article on it I remember. Others out
there as well.

http://www.yccc.org/http://www.yccc.org/Articles/double_l.ht/double_l.htm

Patrick, W7TMT


________________________________
From: Topband <topband-bounces+w7tmt=outlook.com at contesting.com> on behalf
of Roger Kennedy <roger at wessexproductions.co.uk>
Sent: Tuesday, March 23, 2021 3:33:53 PM
To: topband at contesting.com <topband at contesting.com>
Subject: Topband: New Subject: 160M array feedline question


Guy (K2AV) - I really liked your explanation about the function of a radial
field on a 160m vertical . . . and how the radials don't actually radiate.

But I've often thought about the other extreme . . . I have a homebrew 2m
Ground Plane on top of my mast . . . just a quarter wave vertical . . . and
3 quarter wave radials sloping down about 45 degrees.

Now if those radials were vertical, it would really be a vertical Dipole . .
. i.e. the radials would be radiating.  Whereas if they were horizontal, I
guess they wouldn't be.

You get my question . . . what really is the difference between the 3
different radial situations?

And here's another question . . . rather than all the issues of radials and
matching, has anyone ever used a Vertical Dipole on 160m ?

Sure, you're not going to have a 260 ft vertical . . . but suppose you had a
100ft support, so that you could have 50 ft vertical legs either side of the
coax feeder, and then just bend the legs at right angles at the top and
bottom to make up the length (linear loading) - maybe running in opposite
directions.

I would have though that would be quite an efficient antenna?  And
presumably (just like any dipole) it would work even better if the ground
underneath it was very poor (in my opinion)

Roger G3YRO


_________________
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
_________________ Searchable Archives: http://www.contesting.com/_topband -
Topband Reflector


------------------------------

Message: 5
Date: Wed, 24 Mar 2021 11:45:48 +1100
From: List Mail <mail10 at barefoothorse.com.au>
To: "W3HKK at roadrunner.com" <W3HKK at roadrunner.com>,
	"'topband at contesting.com'" <topband at contesting.com>
Subject: Re: Topband: NQ9E - QRM
Message-ID: <mailman.34.1616601728.23553.topband at contesting.com>
Content-Type: text/plain; charset="utf-8"

Not to mention a fire hazard. 
Our power comes in on a Single Wire, Earth Return system. I hear a bit of
power line noise on my antennas closer to the pole transformer, but as I
receive on my Beverage system, hundreds of metres away, it isn?t a problem
for me.
Since the Black Saturday Bushfires of 2009, where an ignition of a major
fire system was traced to a faulty power pole, the distribution companies
have been very diligent with their maintenance of the system (they weren?t
since privatization of the grid). The sensitivity of the breakers has been
increased, and they don?t reclose automatically now.
The main problem with man made noise now is non-EMI compliant electronic
equipment. I feel the horse has bolted there.
And, conditions on 160 m are very poor here, both to NA and EU.
73, Luke VK3HJ

Sent from Mail for Windows 10

From: W3HKK at roadrunner.com
Sent: Wednesday, 24 March 2021 3:38 AM
To: 'topband at contesting.com'
Subject: Topband: NQ9E - QRM

sosunds like you may have power line noise which wont go away, but may vary
with weather.

I had similar problems which I tracked down with an AM radio, and driving
along the roads around my house til I located the likely culprit, a
continuously arcing lightning arrestor on a pole about 0.7 miles away. 

I called the utility and met their crew at the site. Turns out the problem
wasnt at the pole I thought it was, but one pole over. The utility crew
heard the arcing and changed the arrestor. No more problems.

Arrestors can only take so manch discharges. In my case, it didnt clear, and
remained steadily arcing 7/24. That costs the utility $$$ in wasted power,
so they were happy for me to help them find it.

_________________
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector



------------------------------

Message: 6
Date: Tue, 23 Mar 2021 18:16:02 -0700
From: Terry Burge <ki7m.pcr123 at gmail.com>
To: "topband at contesting.com" <topband at contesting.com>,
	"topband-request at contesting.com" <topband-request at contesting.com>
Subject: Topband: subscription cancel KI7M
Message-ID:
	<CAOJvVPXk1R2J4Tjyd2xP2ZpnMrUd=H4QqfM5=eQgSPHtNG35cQ at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"

Please cancel my subscription to the topband group.
Terry
KI7M


------------------------------

Message: 7
Date: Wed, 24 Mar 2021 06:39:55 -0400
From: fmoeves <fmoeves at twc.com>
To: topband at contesting.com
Subject: Re: Topband: subscription cancel KI7M
Message-ID: <eebf66$70nr at vesa03.kjsl.com>
Content-Type: text/plain; charset=utf-8

Another hack???Fred KB4QZH?
-------- Original message --------From: Terry Burge <ki7m.pcr123 at gmail.com>
Date: 3/23/21  9:16 PM  (GMT-05:00) To: topband at contesting.com,
topband-request at contesting.com Subject: Topband: subscription cancel KI7M
Please cancel my subscription to the topband
group.TerryKI7M_________________Searchable Archives:
http://www.contesting.com/_topband - Topband Reflector

------------------------------

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------------------------------

End of Topband Digest, Vol 219, Issue 24
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