Re: Topband: Threading radials
At a prior QTH in the 80's I used 3/4 PVC pipe and T's to support a length of 3/4 CATV hardline as the shunt feed. A single piece of #12 didnt work well at all at any spacing using bandwidth and pileup busting as the criteria. Carl KM1H - Original Message - From: HAROLD SMITH JR w0ri...@sbcglobal.net To: N7DF n...@yahoo.com; Topband@contesting.com Sent: Thursday, August 16, 2012 10:28 PM Subject: Re: Topband: Threading radials I find that 1/2 inch PVC pipe is handy for many things. It can be cut into 6 spacers or insulators. I use it for spacers on my Shunt Fed tower's shunt feed rod. I used 1/2 EMT for the shunt feed rod and the PVC spaced about every 24 to stabilize the rod. I use Black Tie-wraps to secure everything. 73 Price W0RI From: N7DF n...@yahoo.com Subject: Topband: Threading radials I have found that 20 foot lengths of 1/2 inch PVC pipe works very well in getting radial wires through, around and under the very prickly shrubbery that gets in the way here in the New Mexico desert. It is very inexpensive and can be extended to as long a run as is needed. ___ UR RST IS ... ... ..9 QSB QSB - hw? BK ___ UR RST IS ... ... ..9 QSB QSB - hw? BK - No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1424 / Virus Database: 2437/5204 - Release Date: 08/16/12 ___ UR RST IS ... ... ..9 QSB QSB - hw? BK
Re: Topband: Threading radials
ZR and HAROLD, I have been having issues with the tie wraps breaking in the AZ sun. I suspect the UV is getting to them badly. The metal ones don't break, but I can't use those for shunt feeding, of course. Can you recommend a source for ones that don't break? It is a real pain replacing them every year or two.. He he he Mike A (AB7ZU) Kuhi no ka lima, hele no ka maka On Aug 17, 2012, at 6:48, ZR z...@jeremy.mv.com wrote: At a prior QTH in the 80's I used 3/4 PVC pipe and T's to support a length of 3/4 CATV hardline as the shunt feed. A single piece of #12 didnt work well at all at any spacing using bandwidth and pileup busting as the criteria. Carl KM1H - Original Message - From: HAROLD SMITH JR w0ri...@sbcglobal.net To: N7DF n...@yahoo.com; Topband@contesting.com Sent: Thursday, August 16, 2012 10:28 PM Subject: Re: Topband: Threading radials I find that 1/2 inch PVC pipe is handy for many things. It can be cut into 6 spacers or insulators. I use it for spacers on my Shunt Fed tower's shunt feed rod. I used 1/2 EMT for the shunt feed rod and the PVC spaced about every 24 to stabilize the rod. I use Black Tie-wraps to secure everything. 73 Price W0RI From: N7DF n...@yahoo.com Subject: Topband: Threading radials I have found that 20 foot lengths of 1/2 inch PVC pipe works very well in getting radial wires through, around and under the very prickly shrubbery that gets in the way here in the New Mexico desert. It is very inexpensive and can be extended to as long a run as is needed. ___ UR RST IS ... ... ..9 QSB QSB - hw? BK ___ UR RST IS ... ... ..9 QSB QSB - hw? BK - No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1424 / Virus Database: 2437/5204 - Release Date: 08/16/12 ___ UR RST IS ... ... ..9 QSB QSB - hw? BK ___ UR RST IS ... ... ..9 QSB QSB - hw? BK
Re: Topband: Threading radials
Using PVC pipe and their matching T's there is no need of tiewraps. A couple of hose clamps just above the T will hold them in place. Carl KM1H - Original Message - From: Mike Armstrong armst...@aol.com To: ZR z...@jeremy.mv.com Cc: HAROLD SMITH JR w0ri...@sbcglobal.net; Topband@contesting.com Sent: Friday, August 17, 2012 10:10 AM Subject: Re: Topband: Threading radials ZR and HAROLD, I have been having issues with the tie wraps breaking in the AZ sun. I suspect the UV is getting to them badly. The metal ones don't break, but I can't use those for shunt feeding, of course. Can you recommend a source for ones that don't break? It is a real pain replacing them every year or two.. He he he Mike A (AB7ZU) Kuhi no ka lima, hele no ka maka On Aug 17, 2012, at 6:48, ZR z...@jeremy.mv.com wrote: At a prior QTH in the 80's I used 3/4 PVC pipe and T's to support a length of 3/4 CATV hardline as the shunt feed. A single piece of #12 didnt work well at all at any spacing using bandwidth and pileup busting as the criteria. Carl KM1H - Original Message - From: HAROLD SMITH JR w0ri...@sbcglobal.net To: N7DF n...@yahoo.com; Topband@contesting.com Sent: Thursday, August 16, 2012 10:28 PM Subject: Re: Topband: Threading radials I find that 1/2 inch PVC pipe is handy for many things. It can be cut into 6 spacers or insulators. I use it for spacers on my Shunt Fed tower's shunt feed rod. I used 1/2 EMT for the shunt feed rod and the PVC spaced about every 24 to stabilize the rod. I use Black Tie-wraps to secure everything. 73 Price W0RI From: N7DF n...@yahoo.com Subject: Topband: Threading radials I have found that 20 foot lengths of 1/2 inch PVC pipe works very well in getting radial wires through, around and under the very prickly shrubbery that gets in the way here in the New Mexico desert. It is very inexpensive and can be extended to as long a run as is needed. ___ UR RST IS ... ... ..9 QSB QSB - hw? BK ___ UR RST IS ... ... ..9 QSB QSB - hw? BK - No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1424 / Virus Database: 2437/5204 - Release Date: 08/16/12 ___ UR RST IS ... ... ..9 QSB QSB - hw? BK - No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1424 / Virus Database: 2437/5204 - Release Date: 08/16/12 ___ UR RST IS ... ... ..9 QSB QSB - hw? BK
Re: Topband: Threading radials
ZR, Bruce and Bob, thanks for your info. There's the problem. I was using the white ones and didn't know the black ones are UV resistant. I'll check those out. ZR, I need to use tie wraps in my case. I am not, currently, using PVC so I need something that will not make electrical contact which hose clamps would in my case. But that is a good point you make about that thing. If I change my design, which is indeed likely, I will definitely think about using your idea along with PVC. In general, I have avoided using PVC for anything RF.. those tests years ago where the PVC pipes melted and the resulting pictures kind of left a lasting impression that is hard to fight. LOL. I'll get over it, but if you saw the same pictures those many years ago, you would definitely understand why I have avoided it to date :) Mike (AB7ZU) On 8/17/2012 7:42 AM, ZR wrote: Using PVC pipe and their matching T's there is no need of tiewraps. A couple of hose clamps just above the T will hold them in place. Carl KM1H - Original Message - From: Mike Armstrong armst...@aol.com To: ZR z...@jeremy.mv.com Cc: HAROLD SMITH JR w0ri...@sbcglobal.net; Topband@contesting.com Sent: Friday, August 17, 2012 10:10 AM Subject: Re: Topband: Threading radials ZR and HAROLD, I have been having issues with the tie wraps breaking in the AZ sun. I suspect the UV is getting to them badly. The metal ones don't break, but I can't use those for shunt feeding, of course. Can you recommend a source for ones that don't break? It is a real pain replacing them every year or two.. He he he Mike A (AB7ZU) Kuhi no ka lima, hele no ka maka On Aug 17, 2012, at 6:48, ZR z...@jeremy.mv.com wrote: At a prior QTH in the 80's I used 3/4 PVC pipe and T's to support a length of 3/4 CATV hardline as the shunt feed. A single piece of #12 didnt work well at all at any spacing using bandwidth and pileup busting as the criteria. Carl KM1H - Original Message - From: HAROLD SMITH JR w0ri...@sbcglobal.net To: N7DF n...@yahoo.com; Topband@contesting.com Sent: Thursday, August 16, 2012 10:28 PM Subject: Re: Topband: Threading radials I find that 1/2 inch PVC pipe is handy for many things. It can be cut into 6 spacers or insulators. I use it for spacers on my Shunt Fed tower's shunt feed rod. I used 1/2 EMT for the shunt feed rod and the PVC spaced about every 24 to stabilize the rod. I use Black Tie-wraps to secure everything. 73 Price W0RI From: N7DF n...@yahoo.com Subject: Topband: Threading radials I have found that 20 foot lengths of 1/2 inch PVC pipe works very well in getting radial wires through, around and under the very prickly shrubbery that gets in the way here in the New Mexico desert. It is very inexpensive and can be extended to as long a run as is needed. ___ UR RST IS ... ... ..9 QSB QSB - hw? BK ___ UR RST IS ... ... ..9 QSB QSB - hw? BK - No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1424 / Virus Database: 2437/5204 - Release Date: 08/16/12 ___ UR RST IS ... ... ..9 QSB QSB - hw? BK - No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1424 / Virus Database: 2437/5204 - Release Date: 08/16/12 ___ UR RST IS ... ... ..9 QSB QSB - hw? BK
Re: Topband: Threading radials
ZR, Bruce and Bob, thanks for your info. There's the problem. I was using the white ones and didn't know the black ones are UV resistant. I'll check those out. I learned a lesson a long time ago here, after I used big black tie-wraps on all my cables on towers. I have white ties and ropes that are still good after 14 years, and black that fell apart after a few years. While black color generally slows degradation down, black does not mean UV stabilized or even UV resistant. :-) If you want UV resistant, buy something that is UV resistance material or has UV inhibitors, no matter what color. 73 Tom ___ UR RST IS ... ... ..9 QSB QSB - hw? BK
Re: Topband: Threading radials
I've found that black Thomas Betts Ty-Raps are UV resistant, at least in the Ohio sun. I think the TB p/n was TY-525-M. 73, Mike www.w0btu.com ___ UR RST IS ... ... ..9 QSB QSB - hw? BK
Re: Topband: Threading radials
I find that 1/2 inch PVC pipe is handy for many things. It can be cut into 6 spacers or insulators. I use it for spacers on my Shunt Fed tower's shunt feed rod. I used 1/2 EMT for the shunt feed rod and the PVC spaced about every 24 to stabilize the rod. I use Black Tie-wraps to secure everything. 73 Price W0RI From: N7DF n...@yahoo.com Subject: Topband: Threading radials I have found that 20 foot lengths of 1/2 inch PVC pipe works very well in getting radial wires through, around and under the very prickly shrubbery that gets in the way here in the New Mexico desert. It is very inexpensive and can be extended to as long a run as is needed. ___ UR RST IS ... ... ..9 QSB QSB - hw? BK ___ UR RST IS ... ... ..9 QSB QSB - hw? BK
Re: Topband: Threading radials
I use 1/2 75 ohm hardline for shunt feed on my tower. plenty of it around, shield is aluminum protected from the elements. Seems to work just fine. Wayne N1WR -- From: HAROLD SMITH JR w0ri...@sbcglobal.net Sent: Thursday, August 16, 2012 10:28 PM To: N7DF n...@yahoo.com; Topband@contesting.com Subject: Re: Topband: Threading radials I find that 1/2 inch PVC pipe is handy for many things. It can be cut into 6 spacers or insulators. I use it for spacers on my Shunt Fed tower's shunt feed rod. I used 1/2 EMT for the shunt feed rod and the PVC spaced about every 24 to stabilize the rod. I use Black Tie-wraps to secure everything. 73 Price W0RI From: N7DF n...@yahoo.com Subject: Topband: Threading radials I have found that 20 foot lengths of 1/2 inch PVC pipe works very well in getting radial wires through, around and under the very prickly shrubbery that gets in the way here in the New Mexico desert. It is very inexpensive and can be extended to as long a run as is needed. ___ UR RST IS ... ... ..9 QSB QSB - hw? BK ___ UR RST IS ... ... ..9 QSB QSB - hw? BK ___ UR RST IS ... ... ..9 QSB QSB - hw? BK
