[GreenKeys] Jack Hart and i-Telex...

Tue Nov 14 04:25:41 EST 2017

I take that back, one more item is required.. a MAX232 chip or similar on
the parallel port to do level conversion from 5V TTL to +/-9V for RS-232.
This is very do-able! =)

On Tue, Nov 14, 2017 at 3:15 AM, Nico de Jong <nico at farumdata.dk> wrote:

> UARTS of various flavors are not my speciality, io cards like LAVA support
> the speed.
> See http://lavalink.com/serial-cards/
> I used to use ComBro cards, but I dont think they are available in the US.
> Other cards will do too
> However, what I have not been able to find out, is how to get the 45.45
> speed
> /Nico
>
>
> It can be done.
>>>
>>
>> Bingo!
>>
>> I'd be interested in trying out your software, but none of my PCs have a
>> plug-in COM card.. just the typical multi-io chip which handles serial,
>> parallel, maybe the floppy controller, etc.
>>
>> Do you know which of the older UARTS support the slow speeds? Will the
>> 16550C do it, or 8250, or?
>>
>> Very cool, thanks in advance.
>>
>> On Tue, Nov 14, 2017 at 1:29 AM, Nico de Jong <nico at farumdata.dk> wrote:
>>
>> Hi Folks
>>>
>>> It can be done.
>>> I'm presently in the final stages of testing the i-telex part of my
>>> gentex
>>> simulator. This simulator uses a RS232 <> 40 mA (or 60 or 20) currentloop
>>> converter, and a connection to the i-Telex system.
>>> It uses a standard Windows PC, and runs on anything with a Pentium and a
>>> speed of 200 MHz or more.
>>> Have not tried on a 486, but there might be a speed issue.
>>> The only special thing, is an extra card with COM ports, because of the
>>> 50
>>> BPS speed. Most PC's dont support that 'speed'
>>>
>>> The simulator can be used as a single-user i-telex system, but it also
>>> has
>>> many other features, with some in development, e.g. listening in (and
>>> decoding) on encrypted messages.
>>> In my test system, I support 8 teletypes of various speeds and character
>>> sets, as everything, apart from the RS232-currentloop conversion is done
>>> in
>>> software (Delphi 6)
>>> Those interested are welcome to ask for an English manual (which still
>>> needs
>>> to be proof-read and spell-checked).
>>> So, here is the chance to put a 110 BPS machine on the i-telex network,
>>> without any bother
>>>
>>> 73, Nico OZ1BMC
>>>
>>> ----- Original Message -----
>>> From: "drlegendre ." <drlegendre at gmail.com>
>>> To: "Kenneth Gartland" <trnsrme at gmail.com>
>>> Cc: "greenkeys" <GreenKeys at mailman.qth.net>
>>> Sent: Tuesday, November 14, 2017 6:05 AM
>>> Subject: Re: [GreenKeys] Jack Hart and i-Telex...
>>>
>>>
>>> > i-Telex folks,
>>> >
>>> > I cannot understand why so much purpose-made hardware is required to >
>>> join
>>> > the network. I have to say the startup costs are something I could >
>>> never
>>> > justify in my current financial state, just to join such a small base
>>> > of
>>> > users.
>>> >
>>> > What am I missing? Why is it that this cannot be done with a generic PC
>>> > and
>>> > a standard loop converter such as is used to drive an M15? PC handles
>>> > the
>>> > IP networking, custom PC software talks with the TTY over RS-232 and CL
>>> > converter.
>>> >
>>> > How is this not possible?
>>> >
>>> > Best,
>>> > Bill
>>> >
>>> >
>>> > On Mon, Nov 13, 2017 at 5:39 PM, Kenneth Gartland <trnsrme at gmail.com>
>>> > wrote:
>>> >
>>> >> Hi all!
>>> >>
>>> >> Just sent Jack a "Congrats" message on his
>>> >> new i-Telex msg...
>>> >>
>>> >> There is a possibility, my message went out
>>> >> to everyone on the list, whereas I thot it was going
>>> >> directly to Jack!
>>> >>
>>> >> If so, sorry for clogging the airwaves!!
>>> >>
>>> >> Anyways, it great to have you on-board Jack,
>>> >> and hope to have a QSO soon!
>>> >>
>>> >> Cheers to all!
>>> >>
>>> >> Ken
>>> >> VE3-HMQ
>>> >> i-Telex 61663
>>> >>
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>>> >>
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>>> >>
>>> >
>>>
>>>
>>> ------------------------------------------------------------
>>> --------------------
>>>
>>>
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>>
>
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