[GreenKeys] Polar Relays on RS232

[Nick England]

If you see something on eBay, first ask Paul Cembura first to see if
he has it available.
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https://johnwhitney.com/misc/paul-rtty.htm

Nick England K4NYW
Chapel Hill NC
www.navy-radio.com

On Sat, Feb 28, 2026 at 3:28 PM Tom Hunter <tomhenryhunter at gmail.com> wrote:
>
> I have successfully used a common 255A  polar relay,
> 314A polar relays, which are nice because they are sealed and never need adjustment.
> and some octal based, tube size, polar relays with no manufacturers named that  I
> must have bought at a hamfest so long ago that I almost forgot that I had them.
>
> i have used polar relays on several RS232 devices with no problems.
> I saw the idea somewhere on the internet and have used it many times.
>
> Do an eBay search every week for "polar relay"  or "teletype relay" until you
> find a real teletype polar relay for a good price.
>
>  very
> I just found this one:
>
> eBay item number:22713295371
> $25.99 and $7.90 shipping.  That is not a great price, but it is not bad either.
>
> Let me tell you about 925ella. She always has a "make offer".  But if you
> make an offer, she never says yes, never says no, never makes a counter offer.
> You never hear from her!  So pay her price or keep searching every week.
>
> There is another 314A  from a different seller for $78.33, that is not a good price!
>
> Anything above about $20 for a 255A or any unsealed relay is too much - pass it up!
> Unsealed relays need very careful adjustment.
>
> .093  molex females need to be squashed down a tiny bit to fit on 255A or 314A pins..
>
> Maybe someone can recommend a spark suppressor to put acoss the contacts.
> .
>
> Tom   N3CRK
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