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

Tue Nov 14 04:38:31 EST 2017

Yes, I forgot. My conversion box does implement just that chip. The box is 
based on Gil Smiths TTY-CONNECT project.
It connects to a COM port, and I dont intend to modify it for use on a 
parallel port. That wouold severely limit the number of printers one can 
attach.
/Nico
----- Original Message ----- 
From: "drlegendre ." <drlegendre at gmail.com>
To: "Nico de Jong" <nico at farumdata.dk>
Cc: "Green Keys" <GreenKeys at mailman.qth.net>
Sent: Tuesday, November 14, 2017 10:25 AM
Subject: Re: [GreenKeys] Jack Hart and i-Telex...


>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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>>>
>>
>