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1. [TowerTalk] BigIR question (score: 1): Author: Frank VO1HP <invl160@gmail.com>; Date: Sat, 2 Dec 2017 17:25:31 +0000; is the Big IR vertical a 1/4 wave vertical on all bands?...or on bands above 40 some other length? 73 Frank VO1HP _______________________________________________ _____________________________________; /archives//html/Towertalk/2017-12/msg00031.html (6,678 bytes)
2. Re: [TowerTalk] BigIR question (score: 1): Author: Jim Rhodes <jimk0xu@gmail.com>; Date: Tue, 5 Dec 2017 09:31:30 -0600; It is full size on 40, loading coil below that. Jim Rhodes K0XU is the Big IR vertical a 1/4 wave vertical on all bands?...or on bands above 40 some other length? 73 Frank VO1HP _____________________; /archives//html/Towertalk/2017-12/msg00035.html (7,889 bytes)
3. Re: [TowerTalk] BigIR question (score: 1): Author: W0MU Mike Fatchett <w0mu@w0mu.com>; Date: Tue, 5 Dec 2017 08:34:28 -0700; Since the tape or wire inside moves it is 1/4 wave but there some band where you can select 3/4 wave I believe. There is a separate SteppIR group on Yahoo. I do not own a BigIR but have other Stepp; /archives//html/Towertalk/2017-12/msg00036.html (7,940 bytes)
4. Re: [TowerTalk] BigIR question (score: 1): Author: Frank VO1HP <invl160@gmail.com>; Date: Tue, 5 Dec 2017 15:42:38 +0000; OK Jim ...what is it on 20-10m? 1/4 wavelength on each 20-17-12-10? Are there any SWR curves available to see. Frank VO1HP 73 Frank VO1HP On Tue, Dec 5, 2017 at 3:31 PM, Jim Rhodes <jimk0xu@gmail.com; /archives//html/Towertalk/2017-12/msg00047.html (8,532 bytes)
5. Re: [TowerTalk] BigIR question (score: 1): Author: Ed Richardson <ed_richardson@shaw.ca>; Date: Tue, 5 Dec 2017 19:44:07 -1000; Jim. The bigIR can be tuned to a quarter wave on all frequencies from 7 to 54 MHZ. On frequencies from 21-54 MHz you can select a 3/4 wavelength mode. Vswr graphs will mirror theory and will vary wit; /archives//html/Towertalk/2017-12/msg00049.html (9,594 bytes)
6. Re: [TowerTalk] BigIR question (score: 1): Author: "john@kk9a.com" <john@kk9a.com>; Date: Wed, 6 Dec 2017 07:23:00 -0500; This is a much better antenna than the fixed height 43' vertical that is so popular. John KK9A Jim. The bigIR can be tuned to a quarter wave on all frequencies from 7 to 54 MHZ. On frequencies from 2; /archives//html/Towertalk/2017-12/msg00051.html (7,766 bytes)
7. Re: [TowerTalk] BigIR question (score: 1): Author: "Keith Dutson" <kdutson@sbcglobal.net>; Date: Wed, 6 Dec 2017 08:41:07 -0600; I purchased the CrankIR, which is a manual version of the BigIR. It is shorter than the BigIR. SteppIR claims it has a gain .3db lower than the BigIR. I got the 80 meter version, with carry bag (25"L; /archives//html/Towertalk/2017-12/msg00052.html (8,988 bytes)
8. Re: [TowerTalk] BigIR question (score: 1): Author: "Doug Turnbull" <turnbull@net1.ie>; Date: Wed, 06 Dec 2017 10:56:00 -0500; Dear OMs and YLs, I have a BigIR mounted on an extensive radial field and also with the 80/60M loading coil. In contests, I am allowed to run 1500W - I find that on 80M the antenna does not stay in t; /archives//html/Towertalk/2017-12/msg00055.html (9,261 bytes)
9. Re: [TowerTalk] BigIR question (score: 1): Author: Grant Saviers <grants2@pacbell.net>; Date: Wed, 6 Dec 2017 09:32:08 -0800; It's well proven on many DXpeditions, particularly close to salt water. Be aware the single radial can have some very high end voltages at QRO. Also, salt spray on the end insulator can cause arc ove; /archives//html/Towertalk/2017-12/msg00056.html (10,044 bytes)
10. Re: [TowerTalk] BigIR question (score: 1): Author: "john@kk9a.com" <john@kk9a.com>; Date: Wed, 6 Dec 2017 16:10:10 -0500; If you plan to DXpedition in Aruba be sure send in your application months in advance. Getting permission to operate is a long and somewhat expensive process. After you arrive and set up your station; /archives//html/Towertalk/2017-12/msg00057.html (8,572 bytes)
11. Re: [TowerTalk] BigIR question (score: 1): Author: garyk9gs <garyk9gs@wi.rr.com>; Date: Wed, 06 Dec 2017 16:51:24 -0600; I just bought a CrankIR too. Plans are to install over salt water, including the radial/ counterpoise. The whole thing around 100 ft from the beach. 73-Gary K9GS -- Original message --From: Grant; /archives//html/Towertalk/2017-12/msg00058.html (11,473 bytes)
12. Re: [TowerTalk] BigIR question (score: 1): Author: "Keith Dutson" <kdutson@sbcglobal.net>; Date: Wed, 6 Dec 2017 18:58:01 -0600; What is your SWR on 80? Keith NM5G Dear OMs and YLs, I have a BigIR mounted on an extensive radial field and also with the 80/60M loading coil. In contests, I am allowed to run 1500W - I find that on; /archives//html/Towertalk/2017-12/msg00059.html (10,534 bytes)
13. Re: [TowerTalk] BigIR question (score: 1): Author: <john@kk9a.com>; Date: Wed, 6 Dec 2017 21:29:07 -0500; You will fill the pseudo-Brewster much more if you can get it closer to the ocean. My Cayman Is 40m array was about 15' from the sea. John KK9A I just bought a CrankIR too. Plans are to install over; /archives//html/Towertalk/2017-12/msg00060.html (8,062 bytes)
14. Re: [TowerTalk] BigIR question (score: 1): Author: GaryK9GS <garyk9gs@wi.rr.com>; Date: Wed, 06 Dec 2017 21:35:54 -0600; Hi John, My fault, didn't explain well. The whole antenna will be mounted on the end of a pier that extends over 100ft out into the water. 73, Gary K9GS -- Original message --From: john@kk9a.com Da; /archives//html/Towertalk/2017-12/msg00061.html (8,780 bytes)
15. Re: [TowerTalk] BigIR question (score: 1): Author: turnbull <turnbull@net1.ie>; Date: Thu, 07 Dec 2017 08:06:57 +0000; Starts at about 1.2 and heads for 2 to 1. The BE is maybe 20 kHz. This is a Hi Q device when using the loading coil. 73 Doug EI2CN Keith NM5G Dear OMs and YLs, I have a BigIR mounted on an; /archives//html/Towertalk/2017-12/msg00062.html (11,272 bytes)
16. Re: [TowerTalk] BigIR question (score: 1): Author: "Keith Dutson" <kdutson@sbcglobal.net>; Date: Thu, 7 Dec 2017 08:52:45 -0600; That sounds reasonable. You might want to contact SteppIR to help detect the problem. I was using a vertical antenna rated for 1500 watts, but it failed using 1500 watts AM on 80 meters. SWR went ver; /archives//html/Towertalk/2017-12/msg00063.html (12,965 bytes)
17. Re: [TowerTalk] BigIR question (score: 1): Author: "john@kk9a.com" <john@kk9a.com>; Date: Thu, 7 Dec 2017 09:56:06 -0500; That is surprising, can the SteppIR designs be used for legal limit RTTY? John KK9A Sent via the Samsung Galaxy 7 edge, an AT&T 4G LTE smartphone. _______________________________________________ ____; /archives//html/Towertalk/2017-12/msg00064.html (13,444 bytes)
18. Re: [TowerTalk] BigIR question (score: 1): Author: turnbull <turnbull@net1.ie>; Date: Thu, 07 Dec 2017 15:12:05 +0000; The mode was cw. I NOW use an inverted vee mostly. The BigIR is mostly for backup. It is a fine antenna otherwise. 73 Doug EI2CN Sent from my Samsung Galaxy smartphone. -- Original messag; /archives//html/Towertalk/2017-12/msg00065.html (12,627 bytes)
19. Re: [TowerTalk] BigIR question (score: 1): Author: "Keith Dutson" <kdutson@sbcglobal.net>; Date: Thu, 7 Dec 2017 09:39:52 -0600; My vertical antenna for the demonstraion was not a BigIR. I believe the CrankIR vertical is rated 1500 watts, but have not tried it using that much power on RTTY. Keith NM5G That is surprising, can t; /archives//html/Towertalk/2017-12/msg00066.html (13,633 bytes)
20. Re: [TowerTalk] BigIR question (score: 1): Author: Grant Saviers <grants2@pacbell.net>; Date: Thu, 7 Dec 2017 08:56:43 -0800; On 80 and 160 a matching ferrite transformer such as used in the CrankIR is subject to heating with QRO rtty. The solution is a larger core - larger diameter core or a stack or lower power on these l; /archives//html/Towertalk/2017-12/msg00067.html (12,635 bytes)

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