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Total 13 documents matching your query.

1. [TowerTalk] Budget 4-Pack? (score: 1): Author: "Barry Fox" <foxbw@comcast.net>; Date: Mon, 1 Mar 2010 14:40:21 -0500; I have two HF radios and 4 different HF antennas. I would like to use each rig on any antenna, while obviously locking out that antenna for the other rig. The commercial products 6-Pack, 8-Pack, etc; /archives//html/Towertalk/2010-03/msg00008.html (7,104 bytes)
2. Re: [TowerTalk] Budget 4-Pack? (score: 1): Author: Stan Stockton <k5go@cox.net>; Date: Tue, 2 Mar 2010 12:08:54 -0600; Barry, Two DPDT relays for each antenna - one for each rig. Activating a relay by Rig A with one set of contacts disables the other rig from being able to activate the same relay for the same antenna; /archives//html/Towertalk/2010-03/msg00009.html (8,914 bytes)
3. Re: [TowerTalk] Budget 4-Pack? (score: 1): Author: "Stan Stockton" <k5go@cox.net>; Date: Tue, 2 Mar 2010 12:23:34 -0600; Meant to add...Activating a relay by Rig A with one set of contacts disables the other rig from being able to activate the same relay for the same antenna WITH THE OTHER SET OF CONTACTS and visa vers; /archives//html/Towertalk/2010-03/msg00010.html (9,788 bytes)
4. Re: [TowerTalk] Budget 4-Pack? (score: 1): Author: "Larry Banks" <larryb.w1dyj@verizon.net>; Date: Tue, 2 Mar 2010 13:00:19 -0500; Hi Barry, If you only need one transmitter at a time, and if the switch will be in the shack, you could use the MFJ 1700C: http://www.mfjenterprises.com/Product.php?productid=MFJ-1700C 73 -- Larry --; /archives//html/Towertalk/2010-03/msg00011.html (9,194 bytes)
5. Re: [TowerTalk] Budget 4-Pack? (score: 1): Author: Jim Lux <jimlux@earthlink.net>; Date: Tue, 2 Mar 2010 11:50:57 -0800 (GMT-08:00); --Original Message-- I wouldn't trust lockouts in the relay drive logic (e.g. what happens if a relay sticks).. What's your port to port isolation requirement? one way to do it is to use a single pol; /archives//html/Towertalk/2010-03/msg00012.html (9,169 bytes)
6. Re: [TowerTalk] Budget 4-Pack? (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Tue, 2 Mar 2010 15:52:54 -0500; Barry, The schematic for one antenna of the microHAM Double Six and Double Ten switches is shown right on the web page with both RF and control. Here is the principle of operation: <http://www.microh; /archives//html/Towertalk/2010-03/msg00013.html (9,932 bytes)
7. Re: [TowerTalk] Budget 4-Pack? (score: 1): Author: Gregory Fischer <ab7r@cablespeed.com>; Date: Tue, 2 Mar 2010 13:58:39 -0800; http://home.comcast.net/~kk1l/kk1l_2x6switch/TwoRadioSwitchDocumentation.pdf Take a look at this solution. Less expensive and provides the lockout from the control unit. Sent from my iPhone _________; /archives//html/Towertalk/2010-03/msg00014.html (11,194 bytes)
8. Re: [TowerTalk] Budget 4-Pack? (score: 1): Author: "Tony Brock-Fisher" <barockteer@aol.com>; Date: Tue, 2 Mar 2010 17:04:23 -0500; I wrote an article for NCJ on just such a project. Mine was a 6x2 with lockout logic to prevent connecting both radios to the same antenna, and it also has an LED display that indicates antennas in u; /archives//html/Towertalk/2010-03/msg00015.html (7,931 bytes)
9. Re: [TowerTalk] Budget 4-Pack? (score: 1): Author: Jim Rhodes K0XU <k0xu@longlines.com>; Date: Tue, 02 Mar 2010 17:14:36 -0600; I built a box with 2 SPST relays per antenna and switched them with SPDT center off switches, one per antenna. That way each antenna can only be switched to 1 rig at a time (unless a relay sticks) ho; /archives//html/Towertalk/2010-03/msg00016.html (10,892 bytes)
10. Re: [TowerTalk] Budget 4-Pack? (score: 1): Author: "Tom Osborne" <w7why@verizon.net>; Date: Tue, 02 Mar 2010 18:14:37 -0800; Hi Barry I just built some antenna switches to switch antennas between radios. I have one 2-position switch for each antenna. Each switch goes to a 7 position switch at each radio. That way I can sel; /archives//html/Towertalk/2010-03/msg00018.html (9,032 bytes)
11. Re: [TowerTalk] Budget 4-Pack? (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Tue, 02 Mar 2010 21:12:26 -0800; I'm not so wild about that design. If a relay fails closed/stuck, you can short one radio to the other by closing another relay, and there's no failsafe mechanism to provide feedback to the controlle; /archives//html/Towertalk/2010-03/msg00022.html (8,825 bytes)
12. Re: [TowerTalk] Budget 4-Pack? (score: 1): Author: "J. Gordon Beattie, Jr., W2TTT" <w2ttt@att.net>; Date: Tue, 02 Mar 2010 22:04:16 -0800; Barry, I had a similar challenge except that it was 4 x N, where N could be four or more. It was also complicated by the fact that sometimes I want to use two radios with two ports each (PRO3 and PRO; /archives//html/Towertalk/2010-03/msg00023.html (11,774 bytes)
13. Re: [TowerTalk] Budget 4-Pack? (score: 1): Author: "Anthony W. DePrato" <wa4jqs@mikrotec.com>; Date: Wed, 03 Mar 2010 09:28:17 -0500; For years before the high priced switch boxes came along i used 2 of the 4 position switched and do my switching by hand here in the shack. i have two remote switch boxes out side old drake rcs-4's; /archives//html/Towertalk/2010-03/msg00029.html (9,979 bytes)

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