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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Remote\s+switching\s+design\s+choice\s*$/: 5 ]

Total 5 documents matching your query.

1. [TowerTalk] Remote switching design choice (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Sun, 09 Nov 2003 12:28:17 -0500
Can someone explain to me why some remote antenna switch manufacturers use a scheme that supplies 12V to the relay box and switch the ground side of the relays to select antennas, while others supply
/archives//html/Towertalk/2003-11/msg00270.html (7,229 bytes)

2. Re: [TowerTalk] Remote switching design choice (score: 1)
Author: "John Tait" <bravo@iol.ie>
Date: Sun, 9 Nov 2003 20:15:00 -0000
I prefer to supply the voltage to the relay, as I think it's safer. If you use the switch-to-ground system, it means that all the unused lines and relays are sitting at 12 or 24v potential. If any of
/archives//html/Towertalk/2003-11/msg00280.html (9,532 bytes)

3. Re: [TowerTalk] Remote switching design choice (score: 1)
Author: "on4kj" <on4kj@skynet.be>
Date: Sun, 9 Nov 2003 21:47:44 +0100
General rules Pete, switch on the lowest potential side. ( which we know is not always true, fortunately no one holds the truth. ) 2 cent 1/2 worth Euro Jos Weather Stations", and lot's more. Call To
/archives//html/Towertalk/2003-11/msg00282.html (9,254 bytes)

4. Re: [TowerTalk] Remote switching design choice (score: 1)
Author: "Barry " <w2up@mindspring.com>
Date: Sun, 09 Nov 2003 20:49:14 -0000
For the same reason they all have different wiring schemes for the mic connector - to make life difficult for us! 73, Barry W2UP -- Barry Kutner, W2UP Internet: w2up@mindspring.com Newtown, PA Frankf
/archives//html/Towertalk/2003-11/msg00283.html (9,133 bytes)

5. Re: [TowerTalk] Remote switching design choice (score: 1)
Author: "Jim Lux" <jimlux@earthlink.net>
Date: Sun, 9 Nov 2003 14:20:08 -0800
The advantage of the scheme where you put power to the relay common, and switching the grounds to actuate one or more of the relays, is that the switching can be done by open collector NPN drivers. L
/archives//html/Towertalk/2003-11/msg00292.html (9,830 bytes)

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