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Total 11 documents matching your query.

1. [TowerTalk] Shunt Feed Woes (score: 1): Author: K9MA <k9ma@sdellington.us>; Date: Sat, 7 Dec 2019 13:40:49 -0600; I'm further convinced of the need for shunt chokes on ungrounded driven elements on shunt fed towers. See the recent QST article by N9NB. Hopefully, this will be of use to someone else. It may even s; /archives//html/Towertalk/2019-12/msg00013.html (8,041 bytes)
2. Re: [TowerTalk] Shunt Feed Woes (score: 1): Author: "Dave Hachadorian" <k6ll.dave@gmail.com>; Date: Sat, 7 Dec 2019 14:13:16 -0700; Let's discuss these shunt chokes a bit. I am feeding my tower on 80 and 160 with a half-sloper fed near the top of the tower. The sloper length is changed with a vacuum relay to cover both bands. SWR; /archives//html/Towertalk/2019-12/msg00014.html (9,639 bytes)
3. Re: [TowerTalk] Shunt Feed Woes (score: 1): Author: K9MA <k9ma@sdellington.us>; Date: Sun, 8 Dec 2019 01:30:03 -0600; The shunt chokes may not be as critical with the slopers, as the voltage near the top of the tower is probably lower than with a shunt fed tower. I can provide details of the chokes ala N9NB and W5JA; /archives//html/Towertalk/2019-12/msg00019.html (12,176 bytes)
4. Re: [TowerTalk] Shunt Feed Woes (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Sun, 8 Dec 2019 00:27:56 -0800; The N9NB/W5JAW installation seems not bond coax shields to the tower at top and bottom, which is in conflict with long standing good engineering practice for lightning protection. This bonding, combi; /archives//html/Towertalk/2019-12/msg00020.html (9,371 bytes)
5. Re: [TowerTalk] Shunt Feed Woes (score: 1): Author: "Doug Renwick" <ve5ra@sasktel.net>; Date: Sun, 8 Dec 2019 14:50:51 -0600; I thought the definition of a half sloper was that the coax shield was bonded to the top of the tower. I use a quite a number of Balun Design baluns and can find no fault with them keeping in mind th; /archives//html/Towertalk/2019-12/msg00022.html (10,071 bytes)
6. Re: [TowerTalk] Shunt Feed Woes (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Sun, 8 Dec 2019 13:35:20 -0800; The company's definition of success is that the unit doesn't fail destructively -- that is, overheat and destroy itself. Perfect as a business philosophy if the only test instrument your customer own; /archives//html/Towertalk/2019-12/msg00023.html (8,924 bytes)
7. Re: [TowerTalk] Shunt Feed Woes (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Sun, 8 Dec 2019 14:08:51 -0800; On 12/8/19 1:35 PM, Jim Brown wrote: The company's definition of success is that the unit doesn't fail destructively -- that is, overheat and destroy itself. Perfect as a business philosophy if the o; /archives//html/Towertalk/2019-12/msg00024.html (12,262 bytes)
8. Re: [TowerTalk] Shunt Feed Woes (score: 1): Author: "Doug Renwick" <ve5ra@sasktel.net>; Date: Sun, 8 Dec 2019 16:57:28 -0600; Yes we should all try to make a better product. But sometimes good enough is just good enough. The oxygen tank failed on Apollo 13. Does that make the rest of the space craft junk? Until you have act; /archives//html/Towertalk/2019-12/msg00025.html (10,066 bytes)
9. Re: [TowerTalk] Shunt Feed Woes (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Sun, 8 Dec 2019 15:09:28 -0800; This isn't a question of "good enough," but rather does it do what is intended to do (other than the previously cited transfer of funds from buyer to seller). Does "making the buyer feel better" coun; /archives//html/Towertalk/2019-12/msg00026.html (8,955 bytes)
10. Re: [TowerTalk] Shunt Feed Woes (score: 1): Author: Gary Johnson <gwj@wb9jps.com>; Date: Sun, 8 Dec 2019 17:36:08 -0800; Im using a half-sloper for 80, not shunt feeding, but many of the effects and requirements are the same. On a 30 ft tower, I have a JK Navassa 5 and an OB1-4030. All coax is bonded at the top and bot; /archives//html/Towertalk/2019-12/msg00027.html (8,269 bytes)
11. Re: [TowerTalk] Shunt Feed Woes (score: 1): Author: K9MA <k9ma@sdellington.us>; Date: Mon, 9 Dec 2019 16:07:48 -0600; I'm not sure ground the coax shield at the feedpoint is really necessary, provided the driven element is connected to the boom either via a matching network (omega match, as on a TH7) or through a sh; /archives//html/Towertalk/2019-12/msg00034.html (8,578 bytes)

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