[GreenKeys] [Fwd: RTTY - reforming the autostart group from the1970's]

[tony j. podrasky]

Hey Larry et al;

In those days the SELCALS were made from TTL logic.

When I came up-to-speed in the digital field, I
designed one SELCAL that could decode multiple
addresses. Besides my callsign, <space> de <space>,
QST, and ZCZC, I had mine set up for weather reports from
the RTTY weather stations. I was able to pull in the
"English" text and reject all the lines of numbers they
were sending.

My new SELCAL is written into the program for the
DOVETRON. It is set up for one call - but should the
autostart net take off, I can easily add multiple
calls and output files.

73,
W6ESE - tony
NNNNZCZC


Larry Tighe wrote:
> Tony,
> 
> Where does the SelCal unit come from?  Home brew, surplus?
> 
> Lar
> 
>> Hey Guys;
>>
>> I posted this to rec.amateur.radio.
>>
>> I'll let you know if I get any responses.
>>
>> 73,
>> W6ESE
>> NNNNZCZC
>>
>>
>> All the machines had SELCALS (SELective CALling devices) that
>> would activate the machine only when the OP's call letters came
>> thru, or a sequence like "space DE space" - when kept the machines
>> from spewing out paper by the mile when QRN was high. All
>> transmissions would end with a "NNNN" sequence which would reset
>> all the machines on the channel.
>>
>> 73,
>> tony
>>
>> W6ESE
>>   @
>> arrl.net
>>
-- 
Tony J. Podrasky | MicroSoft error messages written in Haiku:
                  |
                  |             A crash reduces
                  |         Your expensive computer
                  |            To a simple stone.