[GreenKeys] Heavy Metal ???

[Larry Tighe]

HI Eric,

Thanks.  We will be using one pgm for the 100 WPM machines.  That would be 
Heavy Metal.  The RS 232 output will go to a Hal ST8000 A which will supply 
tones to the Western Union Telex machine.

The tones from ITTY already go to a Dovetron that keys a Black Box that keys 
the various loops...so, I'm all set now.

I'm told that on Heavy....we just select "news" and we're going to be fine.

Many thanks to all for the input.

Lar
----- Original Message ----- 
From: <epvgk at limpoc.com>
To: "Larry Tighe" <larryradio at att.net>
Cc: "Greenkeys Greenkeys" <greenkeys at mailman.qth.net>; <oliver at wrnj.com>
Sent: Wednesday, October 20, 2010 4:12 PM
Subject: Re: [GreenKeys] Heavy Metal ???


> On Wed, Oct 20, 2010 at 03:59:30PM -0400, Larry Tighe wrote:
>> Howdy Folks,
>>
>> My son is loading Heavy Metal into a computer to be used just the that 
>> and Real Player ITTY.  I want to use the "Metal" for the 100 WPM to the 
>> Model 35.
>>
>> Can someone send me the "address" for the Heavy Metal teletype signal? 
>> Any ideas or suggestions are appreciated.
>>
>> Lar
>> K2JIA
>
> I think those are "incompatible" uses, by which i mean that heavymetal 
> won't
> help you decode ITTY and feed it to a teletype machine. heavymetal will 
> gather
> news, etc.. from the internet and print it on the real hardware; to use 
> ITTY
> you need an AFSK demodulator as provided by other software packages like 
> MMTTY
> or FLdigi, or many others. Those, packages, however, won't feed the data 
> to
> a real teletype machine, but rather just display it on the screen.
>
> To decode ITTY onto a real machine, you need a plain old hardware 
> demodulator,
> or a computer with a current-loop interface running a software 
> demodulator.
>
> I've designed and built a very small circuit board that serves this 
> purpose,
> using the NJM2211 FSK-demodulator chip - the board takes an audio input as 
> from
> the headphone jack of a computer, and has a current-loop interface which 
> can
> be connected directly to a teletype receiver loop (with a suitable loop 
> current
> supply). If you're interested I'm happy to supply the eagle layout and
> schematic for the board but you'd need to source the parts and connectors
> yourself.
>
> eric