[Amps] Johnson KW Matchbox relay question

[Jim]

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 at contesting.com> On Behalf Of Victor 
>> Rosenthal 4X6GP
>> Sent: Tuesday, April 21, 2020 10:56 AM
>> To: Amps reflector <amps at 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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