Hi all,
I had Uverse TV and 1 KW blew away their modem, anyone operating QRO using
Spectrum for TV, Phone and Internet ?
I assume would have a box with DVR and WIFI. Any problem with any feature
being blown away or hash in recorded programs?
If it works better than my ATT and DirecTV I might go for my second 100 on
Topband hi hi
Thanks
Rick N6PE
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On Friday, May 29, 2020, 09:00:47 AM PDT, <topband-request@contesting.com>
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Today's Topics:
1. 160M shunt fed choke (tony.kaz@verizon.net)
2. Re: 160M shunt fed choke (Jim Brown)
3. Re: 160M shunt fed choke (tony.kaz@verizon.net)
4. Re: 160M shunt fed choke (Jim Brown)
5. Re: 160M shunt fed choke (Raymond Benny)
6. Re: 160M shunt fed choke (tony.kaz@verizon.net)
7. Re: 160M shunt fed choke (fmoeves)
8. Re: 160M shunt fed choke (Jim Brown)
9. Re: 160M shunt fed choke (Jim Brown)
10. Re: 160M shunt fed choke (Wes N7WS)
----------------------------------------------------------------------
Message: 1
Date: Thu, 28 May 2020 11:57:56 -0400
From: <tony.kaz@verizon.net>
To: <topband@contesting.com>
Subject: Topband: 160M shunt fed choke
Message-ID: <0a7201d63508$c1827090$448751b0$@verizon.net>
Content-Type: text/plain; charset="us-ascii"
I shunt feed my tower on 160M. The feed is about 4' above the base of the
tower. I use a vacuum cap beta match. I use three vacuum caps. I have a
vacuum relay to switch between high and low 160M. The coax from the shack is
all underground to the base of the tower. The shield of the coax and the
matching network is grounded to a tower leg.
Is there a potential benefit to adding a ferrite core choke for this type of
setup? I can easily add one inside the match box. I could follow K9YC's
info for a 18 turn RG-400 on a 2.4" #31 core.
Tnx for any feedback
N2TK, Tony
------------------------------
Message: 2
Date: Thu, 28 May 2020 10:36:53 -0700
From: Jim Brown <jim@audiosystemsgroup.com>
To: topband@contesting.com
Subject: Re: Topband: 160M shunt fed choke
Message-ID:
<7ad4aa2c-8cc6-4512-2599-d663fe98b1a1@audiosystemsgroup.com>
Content-Type: text/plain; charset=utf-8; format=flowed
On 5/28/2020 8:57 AM, tony.kaz--- via Topband wrote:
> Is there a potential benefit to adding a ferrite core choke for this type of
> setup?
What do you have for a radial system? That's the primary determining
factor. The choke prevents the coax from being used as a radial. If you
have a robust radial system, that's far less of an issue.
73, Jim K9YC
------------------------------
Message: 3
Date: Thu, 28 May 2020 14:06:21 -0400
From: <tony.kaz@verizon.net>
To: <jim@audiosystemsgroup.com>, <topband@contesting.com>
Subject: Re: Topband: 160M shunt fed choke
Message-ID: <0c0301d6351a$b1d90520$158b0f60$@verizon.net>
Content-Type: text/plain; charset="us-ascii"
Hi Jim,
In ground radials - 60. Length 60-100' depending on direction due to a close
in stone wall in one direction.
All the coax is buried and all the shields are tied to the tower legs about
a foot up the tower after the leave the ground.
N2TK, Tony
-----Original Message-----
From: Topband <topband-bounces+tony.kaz=verizon.net@contesting.com> On
Behalf Of Jim Brown
Sent: Thursday, May 28, 2020 1:37 PM
To: topband@contesting.com
Subject: Re: Topband: 160M shunt fed choke
On 5/28/2020 8:57 AM, tony.kaz--- via Topband wrote:
> Is there a potential benefit to adding a ferrite core choke for this
> type of setup?
What do you have for a radial system? That's the primary determining
factor. The choke prevents the coax from being used as a radial. If you have
a robust radial system, that's far less of an issue.
73, Jim K9YC
_________________
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
------------------------------
Message: 4
Date: Thu, 28 May 2020 11:41:45 -0700
From: Jim Brown <jim@audiosystemsgroup.com>
To: topband@contesting.com
Subject: Re: Topband: 160M shunt fed choke
Message-ID:
<843d3836-6a7d-4f5e-cef2-369d6256ab7f@audiosystemsgroup.com>
Content-Type: text/plain; charset=utf-8; format=flowed
I'd guess that you're probably fine without the choke.
73, Jim K9YC
On 5/28/2020 11:06 AM, tony.kaz@verizon.net wrote:
> Hi Jim,
> In ground radials - 60. Length 60-100' depending on direction due to a close
> in stone wall in one direction.
> All the coax is buried and all the shields are tied to the tower legs about
> a foot up the tower after the leave the ground.
>
> N2TK, Tony
>
> -----Original Message-----
> From: Topband <topband-bounces+tony.kaz=verizon.net@contesting.com> On
> Behalf Of Jim Brown
> Sent: Thursday, May 28, 2020 1:37 PM
> To: topband@contesting.com
> Subject: Re: Topband: 160M shunt fed choke
>
> On 5/28/2020 8:57 AM, tony.kaz--- via Topband wrote:
>> Is there a potential benefit to adding a ferrite core choke for this
>> type of setup?
>
> What do you have for a radial system? That's the primary determining
> factor. The choke prevents the coax from being used as a radial. If you have
> a robust radial system, that's far less of an issue.
>
> 73, Jim K9YC
> _________________
> Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
>
------------------------------
Message: 5
Date: Thu, 28 May 2020 12:20:53 -0700
From: Raymond Benny <rayn6vr@gmail.com>
Cc: 160 <topband@contesting.com>
Subject: Re: Topband: 160M shunt fed choke
Message-ID:
<CAHv=PBGV2hgeCt6sg2X6XoqDpq1w7LcmL20WPG73MEeq626L-A@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
One way to tell if a choke is needed I would think, is to add say, a random
lenght of coax, 20 - 40 ft, to the shack end of you coax and see if your
SWR changes. If so, then a then a choke could help.
Jim, does this sound like a reasonable test? I'm no expert on vertical
antennas, just my experience.
Ray,
N6VR/W7YA
On Thu, May 28, 2020, 11:42 AM Jim Brown <jim@audiosystemsgroup.com> wrote:
> I'd guess that you're probably fine without the choke.
>
> 73, Jim K9YC
>
> On 5/28/2020 11:06 AM, tony.kaz@verizon.net wrote:
> > Hi Jim,
> > In ground radials - 60. Length 60-100' depending on direction due to a
> close
> > in stone wall in one direction.
> > All the coax is buried and all the shields are tied to the tower legs
> about
> > a foot up the tower after the leave the ground.
> >
> > N2TK, Tony
> >
> > -----Original Message-----
> > From: Topband <topband-bounces+tony.kaz=verizon.net@contesting.com> On
> > Behalf Of Jim Brown
> > Sent: Thursday, May 28, 2020 1:37 PM
> > To: topband@contesting.com
> > Subject: Re: Topband: 160M shunt fed choke
> >
> > On 5/28/2020 8:57 AM, tony.kaz--- via Topband wrote:
> >> Is there a potential benefit to adding a ferrite core choke for this
> >> type of setup?
> >
> > What do you have for a radial system? That's the primary determining
> > factor. The choke prevents the coax from being used as a radial. If you
> have
> > a robust radial system, that's far less of an issue.
> >
> > 73, Jim K9YC
> > _________________
> > Searchable Archives: http://www.contesting.com/_topband - Topband
> Reflector
> >
>
> _________________
> Searchable Archives: http://www.contesting.com/_topband - Topband
> Reflector
>
------------------------------
Message: 6
Date: Thu, 28 May 2020 16:04:14 -0400
From: <tony.kaz@verizon.net>
To: <jim@audiosystemsgroup.com>, <topband@contesting.com>
Subject: Re: Topband: 160M shunt fed choke
Message-ID: <0cf001d6352b$29e4ba90$7dae2fb0$@verizon.net>
Content-Type: text/plain; charset="us-ascii"
Tnx Jim
Tony
-----Original Message-----
From: Topband <topband-bounces+tony.kaz=verizon.net@contesting.com> On
Behalf Of Jim Brown
Sent: Thursday, May 28, 2020 2:42 PM
To: topband@contesting.com
Subject: Re: Topband: 160M shunt fed choke
I'd guess that you're probably fine without the choke.
73, Jim K9YC
On 5/28/2020 11:06 AM, tony.kaz@verizon.net wrote:
> Hi Jim,
> In ground radials - 60. Length 60-100' depending on direction due to a
close
> in stone wall in one direction.
> All the coax is buried and all the shields are tied to the tower legs
about
> a foot up the tower after the leave the ground.
>
> N2TK, Tony
>
> -----Original Message-----
> From: Topband <topband-bounces+tony.kaz=verizon.net@contesting.com> On
> Behalf Of Jim Brown
> Sent: Thursday, May 28, 2020 1:37 PM
> To: topband@contesting.com
> Subject: Re: Topband: 160M shunt fed choke
>
> On 5/28/2020 8:57 AM, tony.kaz--- via Topband wrote:
>> Is there a potential benefit to adding a ferrite core choke for this
>> type of setup?
>
> What do you have for a radial system? That's the primary determining
> factor. The choke prevents the coax from being used as a radial. If you
have
> a robust radial system, that's far less of an issue.
>
> 73, Jim K9YC
> _________________
> Searchable Archives: http://www.contesting.com/_topband - Topband
Reflector
>
_________________
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
------------------------------
Message: 7
Date: Thu, 28 May 2020 16:06:43 -0400
From: fmoeves <fmoeves@twc.com>
To: topband@contesting.com
Subject: Re: Topband: 160M shunt fed choke
Message-ID: <mailman.26.1590768002.4590.topband@contesting.com>
Content-Type: text/plain; charset=utf-8
I'm going from memory so...?I've seen a video of a simple detector.?In the
video the guy ran along the feedline while transmitting low power.?You could
see if there was a signal on the outside of the cable.?I'll look later to see
if I find.?Fred KB4QZH?
-------- Original message --------From: Raymond Benny <rayn6vr@gmail.com> Date:
5/28/20 3:21 PM (GMT-05:00) To: Cc: 160 <topband@contesting.com> Subject:
Re: Topband: 160M shunt fed choke One way to tell if a choke is needed I would
think, is to add say, a randomlenght of coax, 20 - 40 ft, to the shack end of
you coax and see if yourSWR changes. If so, then a then a choke could help.Jim,
does this sound like a reasonable test? I'm no expert on verticalantennas, just
my experience.Ray,N6VR/W7YAOn Thu, May 28, 2020, 11:42 AM Jim Brown
<jim@audiosystemsgroup.com> wrote:> I'd guess that you're probably fine without
the choke.>> 73, Jim K9YC>> On 5/28/2020 11:06 AM, tony.kaz@verizon.net wrote:>
> Hi Jim,> > In ground radials - 60. Length 60-100' depending on direction due
to a> close> > in stone wall in one direction.> > All the coax is buried and
all the shields are tied to the tower legs> about> > a foot up the tower after
the leave the ground.> >> > N2TK, Tony> >> > -----Original Me
ssage-----> > From: Topband
<topband-bounces+tony.kaz=verizon.net@contesting.com> On> > Behalf Of Jim
Brown> > Sent: Thursday, May 28, 2020 1:37 PM> > To: topband@contesting.com> >
Subject: Re: Topband: 160M shunt fed choke> >> > On 5/28/2020 8:57 AM,
tony.kaz--- via Topband wrote:> >> Is there a potential benefit to adding a
ferrite core choke for this> >> type of setup?> >> > What do you have for a
radial system?? That's the primary determining> > factor. The choke prevents
the coax from being used as a radial. If you> have> > a robust radial system,
that's far less of an issue.> >> > 73, Jim K9YC> > _________________> >
Searchable Archives: http://www.contesting.com/_topband - Topband> Reflector>
>>> _________________> Searchable Archives: http://www.contesting.com/_topband
- Topband> Reflector>_________________Searchable Archives:
http://www.contesting.com/_topband - Topband Reflector
------------------------------
Message: 8
Date: Thu, 28 May 2020 13:15:26 -0700
From: Jim Brown <jim@audiosystemsgroup.com>
To: topband@contesting.com
Subject: Re: Topband: 160M shunt fed choke
Message-ID:
<2e621209-c77a-43a8-3921-c19cf902845d@audiosystemsgroup.com>
Content-Type: text/plain; charset=utf-8; format=flowed
On 5/28/2020 12:20 PM, Raymond Benny wrote:
> One way to tell if a choke is needed I would think, is to add say, a random
> lenght of coax, 20 - 40 ft, to the shack end of you coax and see if your
> SWR changes. If so, then a then a choke could help.
>
> Jim, does this sound like a reasonable test?
No, I don't think so. The reasons for the choke are 1) to minimize noise
pickup on the coax from coupling to the antenna, and from there to your
RX; and 2) to keep TX RF off the coax shield. With the robust radial
system Tony describes, it seems unlikely that the coax shield would see
more than 1/60 of the TX current, or that the coax shield would
significantly change the feedpoint Z, or that it would contribute
audibly to RX noise.
If, however, the antenna was not ideally matched to the feedline,
changing the feedline length could change the Z at the transmitter. But
this would be a transmission line effect, not a common mode issue.
73, Jim K9YC
------------------------------
Message: 9
Date: Thu, 28 May 2020 13:19:16 -0700
From: Jim Brown <jim@audiosystemsgroup.com>
To: topband@contesting.com
Subject: Re: Topband: 160M shunt fed choke
Message-ID:
<dea75abf-a37b-7da3-bd0d-4c58d9b3823e@audiosystemsgroup.com>
Content-Type: text/plain; charset=utf-8; format=flowed
On 5/28/2020 1:06 PM, fmoeves wrote:
> I'm going from memory so...?I've seen a video of a simple detector.?In the
> video the guy ran along the feedline while transmitting low power.?You could
> see if there was a signal on the outside of the cable.?I'll look later to see
> if I find.
Tony's feedline is buried, so could be tricky. But it IS right to move
the probe along the feedline to find a current max, because the current
varies along the line because it would be acting as part of the antenna.
73, Jim K9YC
------------------------------
Message: 10
Date: Thu, 28 May 2020 13:39:11 -0700
From: Wes N7WS <wes_n7ws@triconet.org>
To: jim@audiosystemsgroup.com
Cc: topband@contesting.com
Subject: Re: Topband: 160M shunt fed choke
Message-ID: <7C6A9C89-E6B8-4158-ADE2-8ABFA6BCFECA@triconet.org>
Content-Type: text/plain; charset=utf-8
A buried antenna. Why worry about it?
Wes. N7WS
Sent from my iPhone
> On May 28, 2020, at 1:19 PM, Jim Brown <jim@audiosystemsgroup.com> wrote:
>
> ?On 5/28/2020 1:06 PM, fmoeves wrote:
>> I'm going from memory so... I've seen a video of a simple detector. In the
>> video the guy ran along the feedline while transmitting low power. You could
>> see if there was a signal on the outside of the cable. I'll look later to
>> see if I find.
>
> Tony's feedline is buried, so could be tricky. But it IS right to move the
> probe along the feedline to find a current max, because the current varies
> along the line because it would be acting as part of the antenna.
>
> 73, Jim K9YC
>
> _________________
> Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
------------------------------
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