[Milsurplus] FWD: Hellschreiber / Hell-80 machines

[rumcd@juno.com]

This was on the HELL list. Thought some of you might be intrigued!

-Christopher
k6fib
----

Message: 1
   Date: Thu, 08 Apr 2004 15:10:13 +0200
   From: Andrew Lovell <andrew@lovell-info.se>
Subject: Hell-80
 
Hi
 
A friend of mine can get hold of a number of Hell-80 terminals. Price 200
Euro each, in Holland. Are you interested?
 
The Hell-80 machine has a bit rate which is exactly double that of
Feldhell, and uses a two-tone system. I suppose that some people would
call
this an FM system. 
 
It also uses a stop tone. The transmitting machine sends a stop tone to
stop itself transmitting, and also to stop the receiving machine from
receiving. Sounds a bit complicated, but it works very well. I found that
Hell-80 transmissions are more or less bullet-proof. We set up a link on
80
metres once, and they just chugged away all day long with no problems.
 
The Hell-80 machines were made in the 1960's, but the Bundeswehr did not
buy a large quantity of them, as it did with the Feldhell machine. The
encoder is quite modern - it uses a magnetic core Read-Only memory:
 
I have suggested that Nino should put the Hell-80 standard into some
release of his famous program, but he has not got round to it yet.
 
73
 
Andrew
SM6MOJ

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