- 1. [Amps] Matchbox and relay (score: 1)
- Author: "Bob D." <ajamas.rn@gmail.com>
- Date: Tue, 21 Apr 2020 15:34:57 -0400
- 5000 ohm DC relay per the manual. http://bama.edebris.com/manuals/johnson/matchbox/ _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/m
- /archives//html/Amps/2020-04/msg00012.html (6,559 bytes)
- 2. Re: [Amps] Matchbox and relay (score: 1)
- Author: "Paul Christensen" <w9ac@arrl.net>
- Date: Tue, 21 Apr 2020 16:01:32 -0400
- And the parts list confirms that the rectifier is 35 mA selenium. Possibly it's the same rectifier shown in the linked Sarkes Tarzian catalog from 1950. See model 35 on p. 10. http://www.tubebooks.or
- /archives//html/Amps/2020-04/msg00013.html (7,224 bytes)
- 3. Re: [Amps] Matchbox and relay (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Wed, 22 Apr 2020 05:29:45 -0500
- If I remember correctly, some of the passive components around the rectifier were intended to prevent the relay from hot switching. The KW Matchbox was intended to be an EFJ accessory to the famous D
- /archives//html/Amps/2020-04/msg00014.html (7,235 bytes)
- 4. Re: [Amps] Matchbox and relay (score: 1)
- Author: Victor Rosenthal 4X6GP <k2vco.vic@gmail.com>
- Date: Wed, 22 Apr 2020 18:44:20 +0300
- Yes, I remember the smell of burning selenium rectifier very well! I am going to use the relay to switch my open-line fed antenna to a "T" configuration for 80m. Incidentally, I love the Matchbox. Th
- /archives//html/Amps/2020-04/msg00015.html (8,281 bytes)
- 5. Re: [Amps] Matchbox and relay (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Wed, 22 Apr 2020 15:47:30 -0500
- Wellll, that's a stretch. The KW MB was designed to handle 1 KW input phone and CW. On phone, that's roughly 700 w. output, modulated to roughly 2.8 KW. EFJ probably designed it with some degree of
- /archives//html/Amps/2020-04/msg00017.html (7,516 bytes)
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