[GreenKeys] SAQ VLF using 5-bit tape

[Jim Cooper]

On 25 Dec 2021 at 12:32, Harold Hallikainen wrote:

> 
> There have been some interesting
> approaches over the years. I think KPH
> used high speed Morse from punched
> tape and received to a tape "chart
> recorder" that would then be decoded
> by hand. 

That's the way the undersea cables worked also ...
they had such a setup at Mackay Radio in the 
1970s when I worked there in the M28 Lease Line 
section ... I got to see the NYC-Havana high-speed
morse room once!   Incoming, the weak signal on the 
cable went into a gigantic round electromagnet with 
an armature in the core, which moved an ink pen 
back and forth to draw an ink line on narrow paper 
tape, which was then read by an operator at a keyboard; 
if the cable was working well that day, they could run 
up to about 100wpm ... 

w2jc