During my Commodore-64 days in 1988, I used to enjoy running 75 baud 100wpm RTTY
sending and receiving those long RTTY pictures. Some of thsoe were clevererly
done.
I miss exchanging RTTY pix. Does anyone still do the picture print outs?
73 de
Jack / W7LD / "Lucky Dog"
----- Original Message -----
From: "Kok Chen" <chen@mac.com>
To: "RTTY Reflector" <RTTY@contesting.com>
Sent: Thursday, January 28, 2010 11:51 PM
Subject: [RTTY] A Wikipedia quote.
> While searching for references to ASCII radioteletype, I found this quote at
> http://en.wikipedia.org/wiki/Radioteletype :
>
>> On January 7, 1972, the FCC amended Part 97 to allow faster RTTY speeds.
>> Four
>> standard RTTY speeds were authorized, namely, 60 (45 baud), 67 (50 baud), 75
>> (56.25 baud) and 100 (75 baud) words per minute. Many Amateur Radio
>> operators
>> had equipment that was capable of being upgraded to 75 and 100 words per
>> minute
>> by changing teleprinter gears. While there was an initial interest in 100
>> words
>> per minute operation, many Amateur Radio operators moved back to 60 words
>> per
>> minute. Some of the reasons for the failure of 100 words per minute HF RTTY
>> included poor operation of improperly maintained mechanical teleprinters,
>> narrow bandwidth terminal units, continued use of 170 Hz shift at 100 words
>> per
>> minute and excessive error rates due to multipath distortion and the nature
>> of
>> ionospheric propagation.
>
> I found the last sentence interesting :-). Notice also the comment on
> "narrow
> bandwidth TU." Be sure to open up the filter bandwidths if you try 110 baud
> ASCII and not fall into the same trap.
>
> 73
> Chen, W7AY
>
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