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1. [TowerTalk] Remote control (score: 1): Author: "Frank R. Oppedijk" <f.oppedijk@avista.nl>; Date: Thu, 21 Jul 2005 13:57:20 +0200; Hello all, I'm thinking about an inline switch in an antenna wire. E.g. to press a 40m dipole into service on 20m. Like a trap, but hopefully with less loss. What would be your suggestion: use DC (ho; /archives//html/Towertalk/2005-07/msg00505.html (6,970 bytes)
2. Re: [TowerTalk] Remote control (score: 1): Author: "Keith Dutson" <kdutson@sbcglobal.net>; Date: Thu, 21 Jul 2005 08:32:20 -0500; A switch like this would typically need several ma of current to activate. For this reason I would not use RF. I do not think it is practical. Use a trap instead. 73, Keith NM5G Hello all, I'm thinki; /archives//html/Towertalk/2005-07/msg00510.html (8,378 bytes)
3. Re: [TowerTalk] Remote control (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Thu, 21 Jul 2005 08:53:34 -0700; I think he was thinking about a DC control signal. However, you raise a fascinating idea. A small latching relay doesn't take much energy to actuate (a few milliseconds of 30 mA at 24V, for instance); /archives//html/Towertalk/2005-07/msg00517.html (8,055 bytes)
4. Re: [TowerTalk] Remote control (score: 1): Author: "Frank R. Oppedijk" <f.oppedijk@avista.nl>; Date: Thu, 21 Jul 2005 21:58:59 +0200; Jim, Well, at first I was indeed thinking about switching with RF, but using e.g. a 144MHz RF signal to switch the relays in my 20/40m dipole. I had doubts because of the possible 'RFI' that my HF si; /archives//html/Towertalk/2005-07/msg00520.html (9,598 bytes)
5. [TowerTalk] Remote control (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Thu, 21 Jul 2005 22:04:26 +0100 (BST); G3XJP published his 'Pic-a-Switch' a few years ago in Radcom. This sensed the rf frequency and used relay(s) to select the operating band(s). Unfortunately I have mislaid the copy in which it was pub; /archives//html/Towertalk/2005-07/msg00521.html (7,444 bytes)
6. Re: [TowerTalk] Remote control (score: 1): Author: VR2BrettGraham <vr2bg@harts.org.hk>; Date: Fri, 22 Jul 2005 00:27:56 +0000; I believe N6RK has posted in the past his use of latching relays to band switch a LF vertical - perhaps close to what PA4N is thinking of doing? Getting power out to a relay like that is pretty easy,; /archives//html/Towertalk/2005-07/msg00536.html (8,035 bytes)
7. Re: [TowerTalk] Remote control (score: 1): Author: K4SAV <RadioIR@charter.net>; Date: Thu, 21 Jul 2005 21:44:01 -0500; That might work. The other idea about RF detection, used to trigger a latching relay has some merit if the relay is used at the right location. If you use the relay to disconnect the end segment of a; /archives//html/Towertalk/2005-07/msg00537.html (9,370 bytes)
8. Re: [TowerTalk] Remote control (score: 1): Author: VR2BrettGraham <vr2bg@harts.org.hk>; Date: Fri, 22 Jul 2005 05:12:39 +0000; K4SAV commented on switching in & out some top loading on an HF2V or switching the linear loading in & out of a shorty-forty element with a relay to work 30: Interesting - what I recall from before w; /archives//html/Towertalk/2005-07/msg00546.html (9,771 bytes)
9. Re: [TowerTalk] Remote Control (score: 1): Author: zl1aih@ihug.co.nz; Date: Fri, 22 Jul 2005 17:31:42 +1200; Hi All, I believe N6RK has posted in the past his use of latching relays to band switch a LF vertical - perhaps close to what PA4N is thinking of doing? Getting power out to a relay like that is pret; /archives//html/Towertalk/2005-07/msg00547.html (9,341 bytes)
10. Re: [TowerTalk] Remote control (score: 1): Author: K4SAV <RadioIR@charter.net>; Date: Fri, 22 Jul 2005 01:11:34 -0500; I didn't see that reference. It is a good one. Exactly the information I was trying to convey, with more detail. When you have something as complicated as what N6RK was building, it may justify tryin; /archives//html/Towertalk/2005-07/msg00548.html (11,293 bytes)

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