[Elecraft] K3: QRQ high-speed QSK

[David Cutter]

Tom

Copied by machine onto tape, then passed slowly in front of a typist who 
read the ups and downs and typed from that.  My father did this in the 30's 
from recordings at >100wpm to his typing speed of about 30wpm.  I've seen 
the machines in the Poldu museum but they can't demonstrate them because 
they are running out of tape!

David
G3UNA



> Who the heck is copying that and what are they copying???
>
> The highest speed record for a long time, of copying unexpected text, was 
> only around 70-80 WPM. That record held the whole time I was growing up, 
> and it was from the 30's I think.
>
> It is certainly impossible to copy 300 WPM without decoding.
>
> I have some nagging questions about these speed claims.
>
> W8JI
> >
>
>> This is a *little* OT, but I've just read in a 1914 WT book that they 
>> were
>> regularly running at 300wpm on spark transmitters.  The very clever trick
>> was to operate the spark continuously and FSK it by switching between 
>> taps
>> in the antenna tank.  The receivers were direct conversion using rotary
>> generators on nominal freq then recording the difference on a pen 
>> recorder -
>> I suppose an undulator by another name.  I don't think FSK and DC were
>> phrases in common use at the time.  Astonishing.
>>
>> David
>> G3UNA
>>