[GreenKeys] Real RTTY

[Bob Camp]

Hi

TTY certainly has a direct connection to Teletype in my mind. Of course 
I have also seen (yikes) video terminals with a nice big T on them.

My biggest concern is that if somebody *is* using a computer to 
generate a signal that they do it in a fashion that does not mess up a 
mechanical machine. We simply do not have enough people out there doing 
this to split the group into several more chunks.

	Take Care!

		Bob Camp
		KB8TQ



On Feb 24, 2005, at 10:41 PM, Roy Norris wrote:

> I disagree.
>
> Teletype is an electromechanical means of communications that results 
> in
> printed words on paper.  Radio Teletype is a means of passing signals
> between Teletype machines (which are all mechanical, by the way) which
> makes use of radiated electromagnetic signals and subsequent detection
> and demodulation for a substantial portion of the total signal path.
>
> What is done today with PC's, commonly called "computer RTTY" is a 
> weird
> mixture of an older code intended for mechanical machines with 
> something
> that basically is a word processor, the output of which is transmitted
> over the radio. In its basic technology, there is no print on paper
> involved. (Although we can add that feature by converting Baudot code 
> to
> Ascii and outputting that to a computer printer.  That folks, is not
> Teletype, radio or otherwise !!
>
>  The utter ridiculousness of "computer RTTY" has always amazed me.
> Here, we take a machine that talks in ASCII for all other purposes,
> convert it to Baudot, a five level code developed and optimized for a
> mechanical encoding and decoding device and transmit it over the radio
> instead of the internet!!  I mean how crazy can you get !!!  If you 
> want
> to use a computer to communicate, either use email or personal 
> messaging
> or chat rooms, and the internet.  If you want to use a computer with
> radio as the interconnect means, use a modern, sophisticated error
> correcting code scheme such as Pator III or Clover over the radio.
> Whatever, it isn't Teletype.
>
> Radio Teletype uses Teletype MACHINES.
>
> Regards -- Roy Norris, K4EEG
>
>
>
>
> -----Original Message-----
> From: greenkeys-bounces at mailman.qth.net
> [mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of Lee Reynolds
> Sent: Thursday, February 24, 2005 7:42 PM
> To: greenkeys at mailman.qth.net
> Subject: [GreenKeys] Real RTTY
>
> Interesting to see Real RTTY versus Computer RTTY as terms being used.
>
> Myself, I look on both means of mark/space generation as being a means
> to
> an desired end. I do miss my old RTTY hardware ('20s/'30s vintage Creed
> 3X,
> Creed 10 tape printer, old Olivetti TTY, Creed 75s and a model 15,
> various
> tape readers, perfs and winders) but conversely I don't miss the
> mechanical
> maintenance that went with 'em.
>
> Of course, warm oil and metal is a scent that computers just can't
> recreate. And the synchronized sound of a machine once it gets into the
> groove and starts chugging out the old AP Caribbean HF news link.
>
> Thinking about it, though, I do recall that one of the things that most
> of
> the RTTY types (myself included) were always on the lookout for was 
> more
>
> modern machines to replace the older devices we used. The Creed 444, 
> for
>
> example, was a highly desirable item because of its functionality and
> form
> factor. Then I started building a glass TTY interface in the late
> seventies
> as being a really whizzbang device. And then there were the solid state
> speed controls for motors, regenerative repeaters for signals, etc....
>
> Thing is, we were reaching (although we didn't know it) for exactly the
> kind of RTTY generation means that exist today, courtesy of the PC. 
> Your
>
> average PC/sound card combo can do RTTY stuff that people only dreamt 
> of
>
> thirty years ago.
>
> RTTY's RTTY, regardless of how you generate it, I think. It's what we
> choose to generate the signal that differs, is all. If that perfect 14,
> or
> 15, 19 set or Mini-Mite ever shows up, I'll happily hang it off the
> ST-6000
> and let rip...
>
> But MMTTY and MixW sure do a good job, too.
>
>        Lee
>
>
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