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 Post subject: INFO NEEDED
PostPosted: Feb Fri 09, 2018 8:52 pm 
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Joined: Feb Sun 26, 2012 2:47 am
Posts: 442
Location: Ontario, Canada
Motorola car radio DPST switches from the 1955/56 era have 4 terminals. I've forgotten which terminals are for the lamp, & which are for the radio. The current rating is higher for the radio side.

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John


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 Post subject: Re: INFO NEEDED
PostPosted: Feb Fri 09, 2018 9:50 pm 
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Location: The Old Dominion VA 23518
viewtopic.php?f=15&t=327298&hilit=switch

Pic of the switch in the above post. L and R clearly marked.

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"Capacitor Cosmetologist since 1979"
USN Retired 1984-2006 (Avionics/Cal)


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 Post subject: Re: INFO NEEDED
PostPosted: Feb Fri 09, 2018 10:05 pm 
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Also note that some of them were incorrectly wired on the assembly line, make sure the heavier wires go to the "R" terminals. We used to find them fairly often that were wired backwards, and they don't last nearly as long that way.

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Experience is what you gain when the results aren't what you were expecting.


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 Post subject: Re: INFO NEEDED
PostPosted: Feb Fri 09, 2018 11:06 pm 
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Joined: Feb Sun 26, 2012 2:47 am
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Location: Ontario, Canada
There is an "L" an "R" and an "S" on the switch. I'm assuming the "L" is for lamp, but what does the "S" on the other terminals mean?
The "R" is in the middle. Confusing!

John


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 Post subject: Re: INFO NEEDED
PostPosted: Feb Sat 10, 2018 2:46 am 
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"S" is on the side where the radio power leads go, since it isn't "L". Maybe they want you to look at "R" and "S" as being together?? Never saw any explanation for those markings even in Motorola service manuals, which I have in front of me.

You can easily tell which is which by looking at the contacts inside, the heaviest ones are for the power leads.

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Experience is what you gain when the results aren't what you were expecting.


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 Post subject: Re: INFO NEEDED
PostPosted: Feb Sat 10, 2018 3:28 pm 
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Joined: Feb Sun 26, 2012 2:47 am
Posts: 442
Location: Ontario, Canada
OK. Thanks.
John


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