Rick, Spectrum cable TV and Internet here (no phone) in central Ky. No problems after running QRO (~ 1.25 KW) for about 6 months 160 thru 10.
73, Bill WE5P Comfortably Numb > On May 29, 2020, at 13:02, rick darwicki via Topband <[email protected]> > wrote: > > 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 > > ====================================================================== > > > 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 submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.contesting.com/mailman/listinfo/topband > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: 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: 1 > Date: Thu, 28 May 2020 11:57:56 -0400 > From: <[email protected]> > To: <[email protected]> > Subject: Topband: 160M shunt fed choke > Message-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 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 <[email protected]> > To: [email protected] > Subject: Re: Topband: 160M shunt fed choke > Message-ID: > <[email protected]> > 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: <[email protected]> > To: <[email protected]>, <[email protected]> > Subject: Re: Topband: 160M shunt fed choke > Message-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 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: 4 > Date: Thu, 28 May 2020 11:41:45 -0700 > From: Jim Brown <[email protected]> > To: [email protected] > Subject: Re: Topband: 160M shunt fed choke > Message-ID: > <[email protected]> > 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, [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: 5 > Date: Thu, 28 May 2020 12:20:53 -0700 > From: Raymond Benny <[email protected]> > Cc: 160 <[email protected]> > Subject: Re: Topband: 160M shunt fed choke > Message-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 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 <[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: 6 > Date: Thu, 28 May 2020 16:04:14 -0400 > From: <[email protected]> > To: <[email protected]>, <[email protected]> > Subject: Re: Topband: 160M shunt fed choke > Message-ID: <[email protected]> > Content-Type: text/plain; charset="us-ascii" > > Tnx Jim > Tony > > -----Original Message----- > From: Topband <[email protected]> On > Behalf Of Jim Brown > Sent: Thursday, May 28, 2020 2:42 PM > To: [email protected] > 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, [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: 7 > Date: Thu, 28 May 2020 16:06:43 -0400 > From: fmoeves <[email protected]> > To: [email protected] > Subject: Re: Topband: 160M shunt fed choke > Message-ID: <[email protected]> > 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 <[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: 8 > Date: Thu, 28 May 2020 13:15:26 -0700 > From: Jim Brown <[email protected]> > To: [email protected] > Subject: Re: Topband: 160M shunt fed choke > Message-ID: > <[email protected]> > 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 <[email protected]> > To: [email protected] > Subject: Re: Topband: 160M shunt fed choke > Message-ID: > <[email protected]> > 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 <[email protected]> > To: [email protected] > Cc: [email protected] > Subject: Re: Topband: 160M shunt fed choke > Message-ID: <[email protected]> > 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 <[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 Footer > > _______________________________________________ > Topband mailing list > [email protected] > http://lists.contesting.com/mailman/listinfo/topband > > > ------------------------------ > > End of Topband Digest, Vol 209, Issue 22 > **************************************** > > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband Reflector _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
