Spectrum internet and cable TV here in Northern Kentucky. It was insight then
TWC and now spectrum no problem here QRO for several years. Fred KB4QZH
-------- Original message --------From: rick darwicki via Topband
<[email protected]> Date: 5/29/20 1:03 PM (GMT-05:00) To:
[email protected] Subject: Topband: Spectrum 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 hiThanksRick
N6PE======================================================================Dying
is easy, the hard part is living On Friday, May 29, 2020, 09:00:47 AM PDT,
<[email protected]> wrote: Send Topband mailing list
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Contents of Topband digest..."Today's Topics: 1. 160M shunt fed choke
([email protected]) 2. Re: 160M shunt fed choke (Jim Brown) 3. Re: 160M
shunt fed choke ([email protected]) 4. Re: 160M shunt fed choke (Jim Brown)
5. Re: 160M shunt fed choke (Raymond Benny) 6. Re: 160M shunt fed choke
([email protected]) 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:
1Date: Thu, 28 May 2020 11:57:56 -0400From: <[email protected]>To:
<[email protected]>Subject: Topband: 160M shunt fed chokeMessage-ID:
<[email protected]>Content-Type: text/plain;
charset="us-ascii"I shunt feed my tower on 160M. The feed is about 4' above the
base of thetower. I use a vacuum cap beta match. I use three vacuum caps. I
have avacuum relay to switch between high and low 160M. The coax from the shack
isall underground to the base of the tower. The shield of the coax and
thematching network is grounded to a tower leg.Is there a potential benefit to
adding a ferrite core choke for this type ofsetup? I can easily add one inside
the match box. I could follow K9YC'sinfo for a 18 turn RG-400 on a 2.4" #31
core. Tnx for any feedbackN2TK, Tony------------------------------Message:
2Date: Thu, 28 May 2020 10:36:53 -0700From: Jim Brown
<[email protected]>To: [email protected]: Re: Topband:
160M shunt fed chokeMessage-ID:
<[email protected]>Content-Type:
text/plain; charset=utf-8; format=flowedOn 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: 3Date: Thu, 28 May 2020 14:06:21
-0400From: <[email protected]>To: <[email protected]>,
<[email protected]>Subject: Re: Topband: 160M shunt fed chokeMessage-ID:
<[email protected]>Content-Type: text/plain;
charset="us-ascii"Hi Jim,In ground radials - 60. Length 60-100' depending on
direction due to a closein stone wall in one direction.All the coax is buried
and all the shields are tied to the tower legs abouta foot up the tower after
the leave the ground.N2TK, Tony -----Original Message-----From: Topband
<[email protected]> OnBehalf Of Jim
BrownSent: Thursday, May 28, 2020 1:37 PMTo: [email protected]: Re:
Topband: 160M shunt fed chokeOn 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
determiningfactor. The choke prevents the coax from being used as a radial. If
you havea robust radial system, that's far less of an issue.73, Jim
K9YC_________________Searchable Archives: http://www.contesting.com/_topband -
Topband Reflector------------------------------Message: 4Date: Thu, 28 May 2020
11:41:45 -0700From: Jim Brown <[email protected]>To:
[email protected]: Re: Topband: 160M shunt fed chokeMessage-ID:
<[email protected]>Content-Type:
text/plain; charset=utf-8; format=flowedI'd guess that you're probably fine
without the choke.73, Jim K9YCOn 5/28/2020 11:06 AM, [email protected]
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
<[email protected]> On> Behalf Of Jim Brown>
Sent: Thursday, May 28, 2020 1:37 PM> To: [email protected]> 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: 5Date: Thu, 28 May 2020 12:20:53
-0700From: Raymond Benny <[email protected]>Cc: 160
<[email protected]>Subject: Re: Topband: 160M shunt fed chokeMessage-ID:
<CAHv=pbgv2hgect6sg2x6xoqdpq1w7lcml20wpg73meeq626...@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 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
<[email protected]> wrote:> I'd guess that you're probably fine
without the choke.>> 73, Jim K9YC>> On 5/28/2020 11:06 AM, [email protected]
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
<[email protected]> On> > Behalf Of Jim
Brown> > Sent: Thursday, May 28, 2020 1:37 PM> > To: [email protected]> >
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: 6Date: Thu, 28 May
2020 16:04:14 -0400From: <[email protected]>To:
<[email protected]>, <[email protected]>Subject: Re: Topband:
160M shunt fed chokeMessage-ID:
<[email protected]>Content-Type: text/plain;
charset="us-ascii"Tnx JimTony-----Original Message-----From: Topband
<[email protected]> OnBehalf Of Jim
BrownSent: Thursday, May 28, 2020 2:42 PMTo: [email protected]: Re:
Topband: 160M shunt fed chokeI'd guess that you're probably fine without the
choke.73, Jim K9YCOn 5/28/2020 11:06 AM, [email protected] wrote:> Hi Jim,>
In ground radials - 60. Length 60-100' depending on direction due to aclose> in
stone wall in one direction.> All the coax is buried and all the shields are
tied to the tower legsabout> a foot up the tower after the leave the ground.> >
N2TK, Tony> > -----Original Message-----> From: Topband
<[email protected]> On> Behalf Of Jim Brown>
Sent: Thursday, May 28, 2020 1:37 PM> To: [email protected]> 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 youhave> a robust radial system, that's far less of an issue.> > 73, Jim
K9YC> _________________> Searchable Archives:
http://www.contesting.com/_topband - TopbandReflector>
_________________Searchable Archives: http://www.contesting.com/_topband -
Topband Reflector------------------------------Message: 7Date: Thu, 28 May 2020
16:06:43 -0400From: fmoeves <[email protected]>To: [email protected]:
Re: Topband: 160M shunt fed chokeMessage-ID:
<[email protected]>Content-Type: text/plain;
charset=utf-8I'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 <[email protected]> Date: 5/28/20 3:21 PM
(GMT-05:00) To: Cc: 160 <[email protected]> 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
<[email protected]> wrote:> I'd guess that you're probably fine
without the choke.>> 73, Jim K9YC>> On 5/28/2020 11:06 AM, [email protected]
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
<[email protected]> On> > Behalf Of Jim
Brown> > Sent: Thursday, May 28, 2020 1:37 PM> > To: [email protected]> >
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: 8Date: Thu, 28 May 2020
13:15:26 -0700From: Jim Brown <[email protected]>To:
[email protected]: Re: Topband: 160M shunt fed chokeMessage-ID:
<[email protected]>Content-Type:
text/plain; charset=utf-8; format=flowedOn 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: 9Date: Thu, 28 May 2020 13:19:16
-0700From: Jim Brown <[email protected]>To:
[email protected]: Re: Topband: 160M shunt fed chokeMessage-ID:
<[email protected]>Content-Type:
text/plain; charset=utf-8; format=flowedOn 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: 10Date: Thu, 28 May 2020 13:39:11
-0700From: Wes N7WS <[email protected]>To: [email protected]:
[email protected]: Re: Topband: 160M shunt fed chokeMessage-ID:
<[email protected]>Content-Type: text/plain;
charset=utf-8A buried antenna. Why worry about it?Wes. N7WSSent from my iPhone>
On May 28, 2020, at 1:19 PM, Jim Brown <[email protected]> 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------------------------------Subject: Digest
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