[GreenKeys] How hot is too hot? (Teletype 32)

[Henning Treumann]

Wayne,

as you might be familiar with original Telex, i-Telex is quite the same at
the subscriber side, just international standard 40ma loop instead of 60ma
US Telex.
Anything else is same.
As already mentioned Russ WA3FRP made modification instructions to modify
the M32 control unit to 40ma loop, what Andy did.

73
Henning DF3OE
i-Telex: 925302

www.i-telex.net
www.telexforum.de



WAYNE <teletypeparts at comcast.net> schrieb am Di., 6. Sep. 2022, 19:45:

> Excuse the poor grammar!  More proofreading needed.
>
> Wayne
>
> On 09/06/2022 1:41 PM WAYNE <teletypeparts at comcast.net> wrote:
>
>
> I am not familiar with I Telex workings but a couple of hints that might
> help.
>
> Both 32 and 33 TTY's have power applied to the SMD card when plugged into
> AC.  Even in OFF mode.
>
> 32 Telex are normally 60 MA, not 20.
>
> Its 33's that use 20 MA most times although its strapable to 60 MA and
> also Half Duplex.  Rarely see that configuration.
>
> Using a 32 Telex on RTTY its always in Line Mode and the TU turns on the
> motor so that is one application that can be left plugged into the TU AC
> long as the TU is not left on.
>
> Testing a 32 Telex can be done with a 9 volt batt briefly.
> With the 32 plugged into AC and running open (chattering), apply the batt
> to the Line cord.  It will either shut down the Telex or keeping running
> with the loop closed.  Reverse leads for the opposite condition.
>
> 73,
>
> Wayne
> KB1FDW
>
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