- 1. Topband: Engineering ?? @ relays (score: 1)
- Author: "Ford Peterson" <ford@cmgate.com>
- Date: Wed, 19 Oct 2005 01:44:54 -0500
- I'm still on the hunt for a decent set of relays for a remote matching network. My goal? 1.5KW remote switching box. I went to a local surplus emporium in Minneapolis to scour the junque boxes for de
- /archives//html/Topband/2005-10/msg00141.html (8,653 bytes)
- 2. Re: Topband: Engineering ?? @ relays (score: 1)
- Author: W0UN -- John Brosnahan <shr@swtexas.net>
- Date: Wed, 19 Oct 2005 07:23:59 -0500
- Ford-- We once had a similar problem with all of the Dow-Key coax relays used in our radio astronomy observatory. These were the standard T-shaped relays with gold contacts. We would use a thin strip
- /archives//html/Topband/2005-10/msg00146.html (11,618 bytes)
- 3. Re: Topband: Engineering ?? @ relays (score: 1)
- Author: <paul@w8aef.com>
- Date: Wed, 19 Oct 2005 16:22:53 -0000
- A properly adjusted relay will have 'follow' or wiping action on the contacts. If there is no follow then the relay is not adjusted properly. They don't. I finally had to replace two of the relays i
- /archives//html/Topband/2005-10/msg00150.html (8,982 bytes)
- 4. Re: Topband: Engineering ?? @ relays (score: 1)
- Author: "K9AY" <k9ay@k9ay.com>
- Date: Wed, 19 Oct 2005 13:15:29 -0500
- As others have pointed out, RX switching relays can be more troublesome than TX switching due to contact oxidation. I used sealed relays in my K9AY loops, preamps and RAS-8x2 RX antenna switch that
- /archives//html/Topband/2005-10/msg00152.html (8,184 bytes)
- 5. Re: Topband: Engineering ?? @ relays (score: 1)
- Author: "Ford Peterson" <ford@cmgate.com>
- Date: Thu, 20 Oct 2005 11:30:20 -0500
- Jos, and others... My quest for suitable relays continues. Many have suggested that I simply use vacuum devices. This bullet-proof approach would be the natural 'fix' to the problem of unreliable rel
- /archives//html/Topband/2005-10/msg00176.html (9,661 bytes)
- 6. Topband: Engineering ?? @ relays (score: 1)
- Author: "LA5HE Ragnar Otterstad" <la5he@otterstad.dk>
- Date: Thu, 20 Oct 2005 20:49:20 +0200
- My quest for suitable relays continues. Many have suggested that I simply use vacuum devices. This bullet-proof approach would be the natural 'fix' to the problem of unreliable relay contacts. At $38
- /archives//html/Topband/2005-10/msg00179.html (8,592 bytes)
- 7. Re: Topband: Engineering ?? @ relays (score: 1)
- Author: "f8bpn" <f8bpn@wanadoo.fr>
- Date: Thu, 20 Oct 2005 20:04:37 -0000
- Hello boys! May I suggest you to bring your XYL to hamradio! See you next year in Friedrichshafen, anyway I'll be there and it will be for the first time! By the way this morning I was calling CQ and
- /archives//html/Topband/2005-10/msg00180.html (8,984 bytes)
- 8. Re: Topband: Engineering ?? @ relays (score: 1)
- Author: "Larry Higgins" <n9dx@comcast.net>
- Date: Tue, 25 Oct 2005 18:04:17 -0500
- Back in the days before digital tv tuners, when channels were selected by mechanical switches, contact oxidation was an ongoing problem. I worked for a tv shop for a few years back then. Tuner clean
- /archives//html/Topband/2005-10/msg00270.html (9,924 bytes)
- 9. Re: Topband: Engineering ?? @ relays (score: 1)
- Author: "" <ford@cmgate.com>
- Date: Mon, 24 Oct 2005 18:35:42 -0500
- Eric, and others, This is what I suspect. However, the app note at Potter and Blumfield (Tyco) website indicated that "fine silver" contacts needed 400ma minimum. Yet the "Silver Alloy" relays they o
- /archives//html/Topband/2005-10/msg00271.html (8,913 bytes)
- 10. Re: Topband: Engineering ?? @ relays (score: 1)
- Author: "Tom Rauch" <w8ji@contesting.com>
- Date: Mon, 24 Oct 2005 21:20:21 -0400
- or places like and there should As long as you never hot switch the contacts and the "lube" is very low viscosity it might work OK. As a general rule I never ever leave any coating on a relay contac
- /archives//html/Topband/2005-10/msg00274.html (9,142 bytes)
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