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Today's Topics:
1. Re: Johnson KW Matchbox relay question (Jim)
2. Re: Matchbox and relay (Rob Atkinson)
3. TenTec Titan GOLD Power Supply Failures Pictures (Jim)
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Message: 1
Date: Wed, 22 Apr 2020 06:59:07 -0500
From: Jim <jimw7ry@gmail.com>
To: amps@contesting.com, Victor Rosenthal 4X6GP <k2vco.vic@gmail.com>
Subject: Re: [Amps] Johnson KW Matchbox relay question
Message-ID: <14381b61-3714-943a-7c8e-54b78322c94b@gmail.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Vic..
You can easily tell if its an AC relay if it has the copper shading ring
on the top of the coil near the wiper.
Thanks
73
Jim W7RY
On 4/21/2020 11:29 AM, Victor Rosenthal wrote:
Paul,
Thanks. It's a DC relay then. I'll put together a little power supply
for it. I want it to reconfigure my open-wire dipole as a T shaped
vertical for 80m. I need a relay that can stand the very high voltage
when using it in the two-wire mode and that one looks pretty good.
73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
On 21/04/2020 18:23, Paul Christensen wrote:
Vic,
The schematic shows a 16uF/250 cap directly across the coil.? An
18-ohm/2W
resistor is in series with what *appears* to be a cap that together
are in
series with the 115 VAC source.? However, that cap is shown on the
schematic
as two small "plates" but those plates may in fact be a rectifier,
possibly
even selenium.??? That's the only configuration that makes sense to me.
Paul, W9AC
-----Original Message-----
From: Amps <amps-bounces@contesting.com> On Behalf Of Victor
Rosenthal 4X6GP
Sent: Tuesday, April 21, 2020 10:56 AM
To: Amps reflector <amps@contesting.com>
Subject: [Amps] Johnson KW Matchbox relay question
Not exactly an amp question, but you guys will know.
I have a relay that was removed from a Johnson KW matchbox. I know the
Matchbox relay operated from 115 vac, but the relay is not an AC relay.
I suspect that at some point the Matchbox contained a rectifier and
possibly
other components.
I tried the relay on 32v dc and that was enough to hold it, but not
pull it
in. 115 vac just makes it hum.
I suspect it is a 115 V DC coil. Does anybody know before I destroy
it with
my experiments?
Part no. is EF Johnson 22-1153 or AEMCO 51-2595.
--
73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
CWops no. 5
http://www.qsl.net/k2vco/
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------------------------------
Message: 2
Date: Wed, 22 Apr 2020 15:47:30 -0500
From: Rob Atkinson <ranchorobbo@gmail.com>
To: "amps@contesting.com" <amps@contesting.com>
Subject: Re: [Amps] Matchbox and relay
Message-ID:
<CALWD7Z5=5qQez9B3WMSmNnuKhvhmRbWu90o9k2dzjOMfNvNSDA@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
I think it could easily handle 4 kW on CW and SSB.
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
overkill, but I think I'd expect some flash over on 4 KW.
73
Rob
K5UJ
------------------------------
Message: 3
Date: Wed, 22 Apr 2020 16:39:05 -0500
From: Jim <jimw7ry@gmail.com>
To: amps@groups.io, "amps@contesting.com" <amps@contesting.com>
Subject: [Amps] TenTec Titan GOLD Power Supply Failures Pictures
Message-ID: <68abf0df-e771-b5b5-8594-1b7de10c8cb5@gmail.com>
Content-Type: text/plain; charset=utf-8; format=flowed
I added some photos from Mark, N1UK from his Ten-Tec Titan Gold
amplifier power supply issues..
https://photos.app.goo.gl/2MptkB1x5FMWUjkS8
Thanks
73
Jim W7RY
On 3/25/2020 6:58 AM, Jim W7RY via Groups.Io wrote:
Pictures of the Ten-Tec Gold power supply are here:
https://photos.app.goo.gl/2MptkB1x5FMWUjkS8
--
Thanks
73
Jim W7RY
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End of Amps Digest, Vol 208, Issue 9
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