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References: [ +from:df3kv@t-online.de: 179 ]

Total 179 documents matching your query.

41. Re: [TowerTalk] Mast slipping (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Sat, 21 Apr 2007 19:36:40 +0200
Why should they do so? They claim a wind area capacity of 35 sq. ft. For the Orion The Optibeam just have 8 sq.ft. Is that just a marketing figure? 73 Peter I think they're going to discourage you fr
/archives//html/Towertalk/2007-04/msg00417.html (7,553 bytes)

42. Re: [TowerTalk] Mast slipping (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Sat, 21 Apr 2007 23:20:13 +0200
Right, I looked for the wrong one. But still half the allowed windload 73 Peter The Optibeam OB12-6 has a windload of 16 sqft.k not 8. Why should they do so? They claim a wind area capacity of 35 sq.
/archives//html/Towertalk/2007-04/msg00422.html (9,583 bytes)

43. Re: [TowerTalk] Mast slipping (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Sat, 21 Apr 2007 23:29:03 +0200
Right, Before the rotator the beam will fail. There is a damage foto of the Optibeam OB11-5 with almost identical wind load from my neighborhood: http://www.darc.de/distrikte/h/29/grafik/omk_nach_2.j
/archives//html/Towertalk/2007-04/msg00423.html (8,298 bytes)

44. Re: [TowerTalk] Balun on LPDA (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Sat, 28 Apr 2007 00:07:22 +0200
Hi Greg, I am using a KLM logperiodic, it&acute;s the model 10-30-7LPA with 7 elements. Yes, feed impedance is balanced 200 ohms. The balun does two things: impedance transformation and conversion fr
/archives//html/Towertalk/2007-04/msg00572.html (7,331 bytes)

45. Re: [TowerTalk] stepir vs c31xr (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Fri, 11 May 2007 20:52:46 +0200
You modified your TA-33 to include 17+12m? At my location I beat all trapped 3L yagis with my dipole at 40m height ;-)) 73 Peter I will put my mosley ta-33 classic againt the 3 el ir or c31 force 12
/archives//html/Towertalk/2007-05/msg00188.html (7,028 bytes)

46. Re: [TowerTalk] C31XR versus SteppIR (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Fri, 11 May 2007 23:51:12 +0200
Those figures are EZNEC simulated 73 Peter Currently Force 12 and SteppIR are the only manufacturers that use our protocol to produce useful comparable performance figures. If Optibeam figures were p
/archives//html/Towertalk/2007-05/msg00202.html (8,262 bytes)

47. Re: [TowerTalk] SteppIir vs C31XR (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Sat, 12 May 2007 01:33:53 +0200
I wonder how it can correlate when the receiving dipole is not receiving the main lobe? Even with a position of the receiving antenna 200m above my transmit antenna and 2km away (5,7&deg;) I&acute;m
/archives//html/Towertalk/2007-05/msg00210.html (8,305 bytes)

48. Re: [TowerTalk] C31XR versus SteppIR (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Sun, 13 May 2007 19:53:23 +0200
The figures given by Optibeam on their homepage intercomparable. "decent" being the operative word.. It if there are tapered elements, traps, or lumped >components. The other thing that will definite
/archives//html/Towertalk/2007-05/msg00264.html (11,013 bytes)

49. Re: [TowerTalk] C31XR versus SteppIR (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Mon, 14 May 2007 02:19:17 +0200
Sure it does, even 3db more or less will not be recognized on the air. Arguments here were about gain differences between similar antennas 73 Peter Don't know what the model says about it, but don't
/archives//html/Towertalk/2007-05/msg00281.html (10,018 bytes)

50. Re: [TowerTalk] C31XR versus SteppIR (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Mon, 14 May 2007 04:45:09 +0200
Yes, I know those situations and I count every db myself. On none of my feedlines I loose 1db. But comparing antennas on the air rarely shows a difference with similar antennas 73 Peter ORIGINAL MESS
/archives//html/Towertalk/2007-05/msg00296.html (10,853 bytes)

51. Re: [TowerTalk] 1 dB difference (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Tue, 15 May 2007 22:21:20 +0200
On HF, especially on the low bands it&acute;s the same, There is no reason to be different to VHF/UHF. I agree however, when signals are well above the noise, The 1db difference will not be noticeabl
/archives//html/Towertalk/2007-05/msg00411.html (7,617 bytes)

52. Re: [TowerTalk] Two Verticals one radial field (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Sun, 27 May 2007 13:26:56 +0200
I have put up an inverted L for 160m next to my 80m vertical with 10cm separation using my 80m radial field. Both wires run parallel for 21m and results on 160m are great. The resonance of the 80m ve
/archives//html/Towertalk/2007-05/msg00565.html (8,809 bytes)

53. Re: [TowerTalk] 4el Steppir vs. OB-16-3 (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Sat, 2 Jun 2007 04:15:19 +0200
Hurricanes will be no good, even for an Optibeam http://www.darc.de/distrikte/h/29/grafik/omk_sturm.htm 73 Peter You see, I'm in South Florida, hurricanes and lighting is my real issue, so I wanted t
/archives//html/Towertalk/2007-06/msg00038.html (8,364 bytes)

54. Re: [TowerTalk] 4el Steppir vs. OB-16-3 (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Sat, 2 Jun 2007 12:31:50 +0200
Yes, you both did the better choice. Those Optibeams are generally very well constructed, but those like the OB18-6 would not survive one year at my qth. There is too much stress on the mechanically
/archives//html/Towertalk/2007-06/msg00052.html (11,311 bytes)

55. Re: [TowerTalk] Telrex Monoband matching (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Mon, 2 Jul 2007 21:43:51 +0200
Sure about a 1/4 wave balun? To step up from 50 to 200 Ohms a 1/2 wave balun is needed. 73 Peter Now for the matching - the consensus for the T match is something in the 200 ohm range requiring a 4:1
/archives//html/Towertalk/2007-07/msg00092.html (8,278 bytes)

56. Re: [TowerTalk] 10M Beam Question (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Tue, 3 Jul 2007 22:22:11 +0200
I have 3 105CAs and I am very happy with them. Two are 38 and 26 years old now, the third is 9 years in use. Had that vibration problem as well and lost a couple of tips before inserting 8mm damping
/archives//html/Towertalk/2007-07/msg00154.html (10,798 bytes)

57. Re: [TowerTalk] Ask the experts (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Sun, 8 Jul 2007 04:03:00 +0200
I am not sure. As long they are compared by measurements in their main lobe which will be same angle at the same height above ground it will be fine. With a field strength measurement and the receivi
/archives//html/Towertalk/2007-07/msg00325.html (8,910 bytes)

58. Re: [TowerTalk] Yagi designs? (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Thu, 19 Jul 2007 23:47:07 +0200
I always thought the problem with close spacing and stacking interference were not the booms, as the are not parallel to the elements, but the elements themselves? 73 Peter Nothing beats the W2PV des
/archives//html/Towertalk/2007-07/msg00744.html (9,091 bytes)

59. Re: [TowerTalk] Yagi designs? (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Fri, 20 Jul 2007 00:37:05 +0200
Hi Carl, I wonder why he is not mentioning that in his book to take precaution and avoid certain boom length? "The simplified Yagi model also neglects the conducting boom; this is justified only if t
/archives//html/Towertalk/2007-07/msg00749.html (12,013 bytes)

60. Re: [TowerTalk] How tall is that tower? (score: 1)
Author: "Peter Voelpel" <df3kv@t-online.de>
Date: Thu, 2 Aug 2007 20:00:01 +0200
There are a number of rules and style conventions for the use of the SI. These ensure that scientific and technical communication is not hindered by ambiguity. The United States is now the only indus
/archives//html/Towertalk/2007-08/msg00052.html (11,123 bytes)

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