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Total 6 documents matching your query.

1. [Amps] Solenoid polarity on DC reed relays (score: 1): Author: "Bill VanAlstyne W5WVO" <w5wvo@cybermesa.net>; Date: Wed, 10 Mar 2010 11:48:07 -0700; I'm constructing a vacuum/reed relay QSK T-R system in my converted SB-220 6m amplifier. I'm using two Kilovac HC-1 vac relays for the input and output RF switches and one small RGS-6396 DPDT (SPDT/R; /archives//html/Amps/2010-03/msg00162.html (7,815 bytes)
2. Re: [Amps] Solenoid polarity on DC reed relays (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Wed, 10 Mar 2010 14:13:02 -0500; Bill, DC coil polarity is an issue because polarized relays generally contain a reverse-biased snubbing diode across the relay coil to: (1) protect a solid-state driving circuit from damage resulting; /archives//html/Amps/2010-03/msg00163.html (9,611 bytes)
3. Re: [Amps] Solenoid polarity on DC reed relays (score: 1): Author: Jeff Carter <amps@hidden-valley.com>; Date: Wed, 10 Mar 2010 14:16:46 -0500; I don't have one here to easily check, but it seems to me that a resistance reading would just read the coil in either direction, since that's the path of least resistance. Does this actually work? I; /archives//html/Amps/2010-03/msg00164.html (8,812 bytes)
4. Re: [Amps] Solenoid polarity on DC reed relays (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Wed, 10 Mar 2010 14:23:37 -0500; Jeff: That depends on the coil resistance. The resistance check may not work on relays with low coil resistance. Another check is to apply DC coil voltage with a current-limiting bench supply. Revers; /archives//html/Amps/2010-03/msg00165.html (9,730 bytes)
5. Re: [Amps] Solenoid polarity on DC reed relays (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Wed, 10 Mar 2010 14:39:47 -0500; I use a Viz triple-output bench supply for this kind of testing and I'm always crossing leads by mistake when bread-boarding something. The supply has an adjustable, electronically-switched current t; /archives//html/Amps/2010-03/msg00166.html (10,286 bytes)
6. Re: [Amps] Solenoid polarity on DC reed relays (score: 1): Author: "Bill VanAlstyne W5WVO" <w5wvo@cybermesa.net>; Date: Wed, 10 Mar 2010 12:43:39 -0700; Thanks for the tip. The solenoid coil measures exactly the same in both directions (670 ohms), which is pretty close to the claimed coil resistance (675 ohms). Also, when using the DVM's diode/contin; /archives//html/Amps/2010-03/msg00167.html (11,193 bytes)

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