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Total 25 documents matching your query.

1. [TowerTalk] Remote Switch (score: 1): Author: k9huh@icss.net (Ted & Joyce Wilhelm); Date: Sun, 09 Sep 2001 20:34:25 -0500; Within the past couple weeks I just installed an Ameritron RCS-8V remote antenna switch at the tower...Has worked great until this afternoon and now no relays will close....Checked Voltage across bac; /archives//html/Towertalk/2001-09/msg00353.html (7,724 bytes)
2. [TowerTalk] Remote Switch (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 10 Sep 2001 07:47:24 -0400; If you have anywhere over one volt on all the pins you most likely have an open ground between the relay box and the RCS-8 control unit. The other option is all the leads are shorted, and that is un; /archives//html/Towertalk/2001-09/msg00358.html (7,572 bytes)
3. [TowerTalk] Remote switch (score: 1): Author: Wes <wes_n7ws@triconet.org>; Date: Wed, 23 Oct 2019 12:13:20 -0700; Anyone have any experience with one of these? https://www.ebay.com/itm/MS-S4A-WEB-controlled-REMOTE-ANTENNA-SWITCH-4-POSITIONS-2-KW-PEP-Ready-for-use/202778787695?hash=item2f368ebf6f:g:ec4AAOSwmxVceS; /archives//html/Towertalk/2019-10/msg00187.html (6,664 bytes)
4. Re: [TowerTalk] Remote switch (score: 1): Author: Grant Saviers <grants2@pacbell.net>; Date: Wed, 23 Oct 2019 16:25:37 -0700; I recently looked inside my Ameritron/MFJ RCS-8V 5 position remote switch. Nicely done. I'm pretty sure it was designed by W8JI. I did VNWA the crosstalk - very low. I can't speak to latest MFJ quali; /archives//html/Towertalk/2019-10/msg00188.html (7,688 bytes)
5. Re: [TowerTalk] Remote switch (score: 1): Author: Kim Elmore <cw_de_n5op@sbcglobal.net>; Date: Wed, 23 Oct 2019 20:24:51 -0500; The Ameritron switch uses your transmission line to supply power through a bias-T. Two polarities of DC plus AC and no voltage yield a 4 position switch. It's delightfully simple: mine is an ancient; /archives//html/Towertalk/2019-10/msg00189.html (8,824 bytes)
6. Re: [TowerTalk] Remote switch (score: 1): Author: David Gilbert <xdavid@cis-broadband.com>; Date: Wed, 23 Oct 2019 19:12:07 -0700; From what I've read over the years, the RCS-4 has pretty poor line-to-line isolation. Simple doesn't give you very good isolation, and the way that the RCS-4 uses three relays to get four channels i; /archives//html/Towertalk/2019-10/msg00190.html (10,370 bytes)
7. Re: [TowerTalk] Remote switch (score: 1): Author: "Tim Duffy" <k3lr@k3lr.com>; Date: Wed, 23 Oct 2019 22:16:32 -0400; HI Dave The description on the DXE website for the RCS-4 is correct. We measured it and posted what we found. 73 Tim K3LR At DX Engineering From what I've read over the years, the RCS-4 has pretty po; /archives//html/Towertalk/2019-10/msg00191.html (10,975 bytes)
8. Re: [TowerTalk] Remote switch (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Wed, 23 Oct 2019 19:20:22 -0700; The 4O3A switching units are excellent. I measured the isolation of the most expensive, the 8x2 Antenna Genius, at better than 100 dB! The lower cost 6x2 measured better than 75dB. The Array Solution; /archives//html/Towertalk/2019-10/msg00192.html (7,920 bytes)
9. Re: [TowerTalk] Remote switch (score: 1): Author: Kim Elmore <cw_de_n5op@sbcglobal.net>; Date: Wed, 23 Oct 2019 22:32:00 -0500; Im a bit puzzled by the need for lots of isolation in such a switch. I understand why its needed between different transceivers, but how much is truly needed between antennas to the *same* transceive; /archives//html/Towertalk/2019-10/msg00193.html (8,656 bytes)
10. Re: [TowerTalk] Remote switch (score: 1): Author: jimlux <jimlux@earthlink.net>; Date: Thu, 24 Oct 2019 04:55:33 -0700; On 10/23/19 8:32 PM, Kim Elmore wrote: Im a bit puzzled by the need for lots of isolation in such a switch. I understand why its needed between different transceivers, but how much is truly needed be; /archives//html/Towertalk/2019-10/msg00194.html (8,464 bytes)
11. Re: [TowerTalk] Remote switch (score: 1): Author: Steve London <n2icarrl@gmail.com>; Date: Thu, 24 Oct 2019 09:15:40 -0600; Okay...my dumb questions of the week. Can I use my 2-port nanaVNA (which measures S11 and S21) to measure switch port isolation of a 1:N switch ? If my switch left unused ports open, would I simply m; /archives//html/Towertalk/2019-10/msg00195.html (7,773 bytes)
12. Re: [TowerTalk] Remote switch (score: 1): Author: Wes <wes_n7ws@triconet.org>; Date: Thu, 24 Oct 2019 11:11:49 -0700; Not dumb at all. To simulate what you are really looking for, I would measure s21 between the input port and an unselected output port, if it is open. The selected port should be terminated in 50 o; /archives//html/Towertalk/2019-10/msg00196.html (8,658 bytes)
13. Re: [TowerTalk] Remote switch (score: 1): Author: Neal Sulmeyer <Neal@K4EA.NET>; Date: Fri, 25 Oct 2019 12:18:54 -0400; I have two IG 8x2 4O3A switches. I use them for band switches. They are excellent I also have several other remote switches for each band. Neal, K4EA Email sent using Axigen Free Mail Server: http://; /archives//html/Towertalk/2019-10/msg00197.html (9,730 bytes)
14. Re: [TowerTalk] Remote switch (score: 1): Author: Steve London <n2icarrl@gmail.com>; Date: Fri, 25 Oct 2019 10:26:35 -0600; Thanks for the tips on measuring isolation, Wes. Measured a few switches I had laying around. Old B&W round switch. 70 dB @ 3.5 MHz, 60 db at 28 MHz. Not bad, considering. Array Solutions 2 antenna S; /archives//html/Towertalk/2019-10/msg00198.html (8,508 bytes)
15. Re: [TowerTalk] Remote switch (score: 1): Author: Martin Sole <hs0zed@gmail.com>; Date: Fri, 25 Oct 2019 23:56:25 +0700; That sounds like the difference between a mechanical switch and a basic relay. Martin, HS0ZED Measured a few switches I had laying around. Old B&W round switch. 70 dB @ 3.5 MHz, 60 db at 28 MHz. Not; /archives//html/Towertalk/2019-10/msg00199.html (8,427 bytes)
16. Re: [TowerTalk] Remote switch (score: 1): Author: Martin Sole <hs0zed@gmail.com>; Date: Sat, 26 Oct 2019 00:03:11 +0700; Adding a bit here, there are some simple ways to make a good switch using relays. Use two relays so the contacts are in series. Arrange the layout for good physical separation, a central common point; /archives//html/Towertalk/2019-10/msg00200.html (9,567 bytes)
17. Re: [TowerTalk] Remote switch (score: 1): Author: "Richard (Rick) Karlquist" <richard@karlquist.com>; Date: Fri, 25 Oct 2019 11:29:18 -0700; Measured a few switches I had laying around. Old B&W round switch. 70 dB @ 3.5 MHz, 60 db at 28 MHz. Not bad, considering. Array Solutions 2 antenna Stackmatch. 45 dB @ 14 MHz. Hmmm. 73, Steve, N2IC; /archives//html/Towertalk/2019-10/msg00201.html (9,100 bytes)
18. Re: [TowerTalk] Remote switch (score: 1): Author: john@kk9a.com; Date: Fri, 25 Oct 2019 13:54:45 -0500; Does this mean if you have one beam aimed at the Caribbean and one on Europe and only the EU antenna is selected, you're still receiving stations on the Caribbean beam but 45dB weaker? Is this an iss; /archives//html/Towertalk/2019-10/msg00202.html (7,814 bytes)
19. Re: [TowerTalk] Remote switch (score: 1): Author: David Gilbert <xdavid@cis-broadband.com>; Date: Fri, 25 Oct 2019 16:33:24 -0700; Why are you limiting the consideration to receive? If you have more than one rig (i.e., transmitter) in operation with remote switches controlling which antenna goes to which rig, how happy would yo; /archives//html/Towertalk/2019-10/msg00203.html (8,919 bytes)
20. Re: [TowerTalk] Remote switch (score: 1): Author: john@kk9a.com; Date: Fri, 25 Oct 2019 19:49:55 -0500; I was referring to the StackMatch in N2IC's post, not a general antenna relay. A Stackmatch is generally used to split the TX/RX of a single radio to one, two or three Yagis while maintaining a 50 oh; /archives//html/Towertalk/2019-10/msg00204.html (8,659 bytes)

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