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References: [ +from:dj7ww@t-online.de: 172 ]

Total 172 documents matching your query.

141. Re: [TowerTalk] Where to get LMR 400 (score: 1)
Author: <dj7ww@t-online.de>
Date: Tue, 3 Nov 2020 17:24:20 +0100
RG213 is specified with 1300W on 6m 73 Peter Maybe he means on the inside:-) Wes  N7WS flexibility. resistance on seen _______________________________________________ ________________________________
/archives//html/Towertalk/2020-11/msg00017.html (10,370 bytes)

142. Re: [TowerTalk] Where to get LMR 400 (score: 1)
Author: <dj7ww@t-online.de>
Date: Tue, 3 Nov 2020 18:32:45 +0100
Yes, the current heats up the dielectric around the center conductor. RG393 with the same conductor size and its PTFE dielectric is specified at 9500W on 6m. 73 Peter MIL-C-17/74 (RG 213 spec) sort o
/archives//html/Towertalk/2020-11/msg00024.html (9,793 bytes)

143. Re: [TowerTalk] Where to get LMR 400 (score: 1)
Author: <dj7ww@t-online.de>
Date: Tue, 3 Nov 2020 19:46:43 +0100
7/8 inch Cellflex is a quarter of the price of RG393, good for 12.3kW on 6m, but hard to use as a rotator loop, more then double the diameter and far smaller bending radius. 73 Peter If I were to spe
/archives//html/Towertalk/2020-11/msg00028.html (9,745 bytes)

144. Re: [TowerTalk] Where to get LMR 400 (score: 1)
Author: <dj7ww@t-online.de>
Date: Tue, 3 Nov 2020 23:40:44 +0100
I am aware of that, power levels were referenced for 100% duty cycle and 40°C ambient temperature. 73 Peter See my comment re: duty cycle and conditions of installation. 73, Jim K9YC 6m, ____________
/archives//html/Towertalk/2020-11/msg00031.html (9,791 bytes)

145. Re: [TowerTalk] Where to get LMR 400 (score: 1)
Author: <dj7ww@t-online.de>
Date: Wed, 4 Nov 2020 04:15:18 +0100
I donīt think that RFS Cellflex 7/8" is mentioned in MIL C-17. 40° at the specified power level are given by the manufactor. 73 Peter Mean Power rating in kW 0,5 MHz 85 at 40°C ambient temperature 1
/archives//html/Towertalk/2020-11/msg00033.html (10,440 bytes)

146. Re: [TowerTalk] LMR-600UF and variants (score: 1)
Author: <dj7ww@t-online.de>
Date: Fri, 13 Nov 2020 20:10:25 +0100
SCF12-50JFN by RFS is probably half that price. https://www.rfsworld.com/WebSearchECat/datasheets/pdf/cache/SCF12-50JFN.pdf 73 Peter The outer jacket on LMR-600UF..and also LMR-400UF is rubber. The r
/archives//html/Towertalk/2020-11/msg00147.html (10,069 bytes)

147. Re: [TowerTalk] FW: FW: Thrust Bearing Installation (score: 1)
Author: "Peter Voelpel" <dj7ww@t-online.de>
Date: Sun, 27 Dec 2020 19:12:10 +0100
Yes, thatīs what I use, Nylon or POM plates with a hole cut for the mast. I also still use a thick bronze bearing on one tower. All weight is on the rotator and I use another shelf above the rotator
/archives//html/Towertalk/2020-12/msg00157.html (11,163 bytes)

148. Re: [TowerTalk] FW: FW: Thrust Bearing Installation (score: 1)
Author: "Peter Voelpel" <dj7ww@t-online.de>
Date: Sun, 27 Dec 2020 20:19:34 +0100
Yes, the black UHMW will be the best for that purpose and 5% cheaper then POM (Delrin), POM-C should be used black only as well. 73 Peter When I need a top plate radial bearing, I use black UHMW whic
/archives//html/Towertalk/2020-12/msg00159.html (13,646 bytes)

149. Re: [TowerTalk] Compatible Hardline Connectors (score: 1)
Author: "Peter Voelpel" <dj7ww@t-online.de>
Date: Fri, 14 May 2021 00:52:23 +0200
Yes, the cables are identical, I use both. 73 Peter I have several Cablewave 738801 Type-N female connectors for FCL12-50 cable. Anyone know if these connectors can go on to Andrew LDF4-50A cable as
/archives//html/Towertalk/2021-05/msg00048.html (7,908 bytes)

150. Re: [TowerTalk] OptiBeam OB2-40M (score: 1)
Author: "Peter Voelpel" <dj7ww@t-online.de>
Date: Thu, 20 May 2021 08:57:00 +0200
That 130km/h figure is not the wind survival but the reference wind velocity for the wind load of 500N. 130km/h is the standard reference for stress calculations in Germany used for all locations exc
/archives//html/Towertalk/2021-05/msg00073.html (9,659 bytes)

151. Re: [TowerTalk] OptiBeam OB2-40M (score: 1)
Author: "Peter Voelpel" <dj7ww@t-online.de>
Date: Fri, 21 May 2021 21:50:18 +0200
That is hard to believe unless there is too much interaction between the antennas and makes them useless. Or all antennas except the Cushcraft are wrong assembled. Are all these antennas at the same
/archives//html/Towertalk/2021-05/msg00086.html (8,392 bytes)

152. Re: [TowerTalk] OptiBeam OB2-40M (score: 1)
Author: "Peter Voelpel" <dj7ww@t-online.de>
Date: Sun, 23 May 2021 23:10:41 +0200
Everything can be calculated and designed with help of EZNEC. That's what I did for my 3-element fullsize yagi which works very well for me. I optimized it for best front to back within the most acti
/archives//html/Towertalk/2021-05/msg00119.html (13,832 bytes)

153. Re: [TowerTalk] OCFD: Should I be able to do better? (score: 1)
Author: "Peter Voelpel" <dj7ww@t-online.de>
Date: Thu, 27 May 2021 20:18:39 +0200
The statement is: " Stick with RESONANT antennas fed with coax and chokes", not "An OCFD is not resonant"! Antennas not fed symmetrical and choked CAN pickup more local noise. If you donīt have any y
/archives//html/Towertalk/2021-05/msg00159.html (14,321 bytes)

154. Re: [TowerTalk] Yaesu G800 Slipping on 25G Rotor Plate (score: 1)
Author: "Peter Voelpel" <dj7ww@t-online.de>
Date: Sun, 30 May 2021 18:17:59 +0200
Hi Rob, There is an absorber mount available from Yaesu which might solve the problem: https://www.dxengineering.com/parts/ysu-ga-3000?rrec=true 73 Peter Hi Group,   A couple questions. I installed a
/archives//html/Towertalk/2021-05/msg00193.html (9,648 bytes)

155. Re: [TowerTalk] 7/8" hardline connector compatibility (score: 1)
Author: "Peter Voelpel" <dj7ww@t-online.de>
Date: Tue, 1 Jun 2021 18:37:12 +0200
I used Andrew connectors on 1/2" and 1 5/8" Cellflex cable by RFS without problems, I guess the 7/8" Andrew connectors will also fit LCF78-50 as do connectors by Rosenberger, Eupen, Wisi, Spinner, Te
/archives//html/Towertalk/2021-06/msg00003.html (8,227 bytes)

156. Re: [TowerTalk] TH-7 (score: 1)
Author: "Peter Voelpel" <dj7ww@t-online.de>
Date: Fri, 3 Sep 2021 20:15:34 +0200
The stacking gain on 20m will be less then 4dB. 73 Peter <There was an op in Texas who mounted 4 of these on a rotating tower. There <was an article in one of the ham magazines some years ago about i
/archives//html/Towertalk/2021-09/msg00021.html (9,070 bytes)

157. Re: [TowerTalk] TH-7 (score: 1)
Author: "Peter Voelpel" <dj7ww@t-online.de>
Date: Fri, 3 Sep 2021 21:58:06 +0200
With that stocking distance on 20m you will be lucky to get 3dB gain. With 21m distance between 20m antennas you might reach 5.6dB 73 Peter _____ From: jim.thom jim.thom@telus.net [mailto:jim.thom@te
/archives//html/Towertalk/2021-09/msg00032.html (10,331 bytes)

158. Re: [TowerTalk] TH-7 (score: 1)
Author: "Peter Voelpel" <dj7ww@t-online.de>
Date: Fri, 3 Sep 2021 23:32:00 +0200
Indeed, with all 4 antennas in phase, the combined radiation angle of that system is almost that of the highest antenna alone. I stacked my 20m 5/5/5 at 147, 85 and 33 feet. 73 Peter There are two di
/archives//html/Towertalk/2021-09/msg00036.html (9,674 bytes)

159. Re: [TowerTalk] TH-7 (score: 1)
Author: "Peter Voelpel" <dj7ww@t-online.de>
Date: Sat, 4 Sep 2021 09:54:36 +0200
I am just considering the maximum possible stacking gain, not the different elevation angles. 73 Peter Take a look at HFTA using flat ground ... A stack of 3 element yagis at 35/70/105/140 shows betw
/archives//html/Towertalk/2021-09/msg00039.html (11,905 bytes)

160. Re: [TowerTalk] Kellums Grip for supporting cables aat tower top (score: 1)
Author: "Peter Voelpel" <dj7ww@t-online.de>
Date: Fri, 8 Oct 2021 00:28:42 +0200
Sure, I turn RG217 and LCF12-50 on Versatower crank-up. Use also RG218 as rotator loop on fixed tower. 73 Peter DJ7WW Probably tape and some good cable ties would work. I am wondering if RG217 is fle
/archives//html/Towertalk/2021-10/msg00040.html (9,103 bytes)


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