European (or better non Teletype) machines use a very sensitive polarized relay to detect
the current loop reversing of the TW39 system which switches the motor power relay after
an incoming call.
Hence stand-by power usage of an European Telex control unit is almost nothing.

I would install the mentioned resistors on a small distance to the PCBs.

And yes... it should be online 24/7 - that's the fun of i-Telex. :-)

73
Henning DF3OE
i-Telex 925302 

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



Am Mo., 5. Sept. 2022 um 22:54 Uhr schrieb Paul Heller <paul0926@comcast.net>:
Nice machine!

A fan is an interesting idea. A small one that runs off 120vac perhaps.

I don’t have that insulator in mine and I think Wayne’s suggestion to remove it is a good one. I often leave the lid opened to let air circulate in there.

It seems like a bad design. The European machines have a relay which is much better. I don’t know how they dissipate power from the small amount of loop current when not in a call, but I’ve not noticed heat build up in them. Yes it gets pretty warm and I often worry about that but so far all is doing ok on my machine. I do power it off when going away for any extended amount of time.

Paul
W2TTY

> On Sep 5, 2022, at 4:37 PM, Andy KN4UCL <kn4ucl@gmail.com> wrote:
>
> 
> Hey folks, I recently got my M32 up and running on i-Telex and all is good but things are getting a little toasty and I am not sure how much I need to worry.  Please see attachments - the circles I drew show where it's getting hot.  120-130F if my Harbor Freight thermometer is to be believed.
>
> As there is quite a bit of room in there, I was wondering if a small fan would be helpful. 
>
> Any thoughts appreciated!
>
> thanks
> Andy
>
>
> ______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:GreenKeys@mailman.qth.net
>
>>>> Jordan Spencer Cunningham's GreenKeys Search Tool: https://teletype.net/gksearch
>>>> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
>>>> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to paul0926@comcast.net
______________________________________________________________
GreenKeys mailing list
Home: http://mailman.qth.net/mailman/listinfo/greenkeys
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:GreenKeys@mailman.qth.net

>>> Jordan Spencer Cunningham's GreenKeys Search Tool: https://teletype.net/gksearch
>>> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
>>> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to df3oe.henning@googlemail.com