[GreenKeys] TTY Demo at Dayton in 2010?

[Ralph Mowery]

----- Original Message ----- 
From: "Jim Haynes" <jhhaynes at earthlink.net>
To: "WB6BLV (DM06)" <wb6blv at inreach.com>
Cc: <greenkeys at mailman.qth.net>
Sent: Sunday, June 07, 2009 8:33 PM
Subject: Re: [GreenKeys] TTY Demo at Dayton in 2010?


> On Sat, 6 Jun 2009, WB6BLV    (DM06) wrote:
>
>> The ST-6 is vintage?  Holy cow, I must truly be ancient, having built the
>> Twin Cities, Chem City, and PAT  TUs long before the ST series...
>>
>> John
>> WB6BLV
>>
> I'm familiar with Twin Cities and I guess you mean W2PAT, but what is
> Chem City?
>
> Sadly, a lot of the younger generation thinks RTTY began with Irv Hoff,
> probably because of his series of articles in QST.  There was a lot of
> great stuff done in earlier years.  I worked W2PAT on PSK just a few years
> ago, and assume he is still living.
>
> Jim W6JVE

I would not have thought W2PAT was still living, but looking him up on qrz 
shows the call belongs to someone born in  1915 so it probably was him.

When I got a modle 19 from an older ham about 25 years ago he had a PAT 
demodulator that was home built in a Heathkit AT1 case.  I retuned the 
mark/space filters for 170 shift and redid the bandpass filter for narrow 
shift.  It did a good job as long as the band was not too full of signals. 
I loaned it to someone and have not seen it in years.  I also got a bunch of 
QST and CQ magazines with the 19 going back to about 1950.  Interisting 
reading.

 I think it was around 1964 or 65 that Hoff published his first 
demodulators.  Hardly the first rtty for hams, but top of the line units. 
Then 7 ot 8 years later he had the solid state units.

I recall seeing the twin cities somewhere, but don't recall the Chem City 
units either, but then again it was around 1980 when I first got interisted 
in rtty.