[GreenKeys] Polar Relay ID

[John, W9DDD]

Hi Chuck,

Description of the more common ones.

https://www.navy-radio.com/manuals/tty/570-303-106-6412.pdf

And if you want a deep dive, including a lot of telegraph circuit theory.

https://www.navy-radio.com/manuals/tty/training--transmission.pdf

(5ESS and 5crossbar would be two different animals, right?   I don't 
recall seeing any 33 or 43 on the boy scout tour of the new 5crossbar in 
my home town that replaced a switchboard on the second floor of the 
business office)


---
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You said "tomorrow" yesterday.

The above comments or recommendations are SWAG. Use at your own risk.
John, W9DDD

On 6/20/2023 5:49 PM, Chuck Rehor wrote:
> Hi GreenKeyers,
>
> Pls forgive my complete ignorance, but what is a Polar Relay and what 
> does it do? I’ve heard it mention here tons of times, and even though 
> I’ve followed this channel for years, I am learning slowly. I’m mostly 
> interested in Model 33 and 43’s (as they apply to 5ESS’s) but still 
> appreciate all TTYs.
>
> Thanks!
> Chuck Rehor
>
> On Tue, Jun 20, 2023 at 12:35 PM John W9DDD <w9ddd at tapr.org 
> <mailto:w9ddd at tapr.org>> wrote:
>
>     Just when you think you've read every tiny detail about
>     teletypewritery, along comes another mystery.
>
>     John, W9DDD
>
>
>     > On Jun 20, 2023, at 12:27 PM, B. Smith <smithab11 at comcast.net
>     <mailto:smithab11 at comcast.net>> wrote:
>     >
>     > Anyone have any info on this polar relay with the lever? The
>     external lever varies a magnetic bias on the armature.
>     > k4che
>     > <3BTk4che.JPG>
>     >
>     >
>     > <3BTk4che.JPG>
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