15 Nov
2007
15 Nov
'07
7:32 p.m.
Date: Thu, 15 Nov 2007 19:14:48 -0500
From: wdonzelli at gmail.com
To: cctalk at classiccmp.org
Subject: Re: BBC coverage: Colossus vs. Modern hardware
Will,
I did some fairly bizarre modem design for a downhole well logging camera, transmitting
power and digital video over 5 miles of coax. I can probably answer any modulation
questions you may have, or point you to the literature I used in my research and design.
Randy
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AFAIK there's no transmission equipment as
part of the SZ42 itself though, so
something would still need to be hooked between that and a giant aerial in
order to do the transmission; I think it was this bit that Will was interested in.
No, I am interested in the thing that modulates the bitstream, before
the transmitter. The modem, basically, not the transmitter.
--
Will 
15 Nov
15 Nov
8:25 p.m.
I did some fairly bizarre modem design for a downhole
well logging camera, transmitting power and digital video over 5 miles of coax. I can
probably answer any modulation questions you may have, or point you to the literature I
used in my research and design.
I think I can be pretty certain to say the Germans were doing nothing
really odd back then. I am more interested in exactly what kind of set
they were using to do the FSK modulation (and demodulation).
--
Will
9:22 p.m.
Date: Thu, 15 Nov 2007 23:25:13 -0500
From: wdonzelli at gmail.com
To: cctalk at classiccmp.org
Subject: Re: BBC coverage: Colossus vs. Modern hardware
You might check out Heddy Lamar, and spread spectrum modulation on the wiki. It looks
like Telefunken was into this for secret communications. It might turn out to be quite a
bit more sophisticated than you think.
Randy
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I did some fairly bizarre modem design for a
downhole well logging camera, transmitting power and digital video over 5 miles of coax.
I can probably answer any modulation questions you may have, or point you to the
literature I used in my research and design.
I think I can be pretty certain to say the Germans were doing nothing
really odd back then. I am more interested in exactly what kind of set
they were using to do the FSK modulation (and demodulation).
--
Will 
9:36 p.m.
You might check out Heddy Lamar,
Hedley.
--
------------------------------------ personal: http://www.cameronkaiser.com/ --
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16 Nov
16 Nov
12:07 a.m.
On Fri, 16 Nov 2007, Gordon JC Pearce wrote:
On Thu, 2007-11-15 at 21:36 -0800, Cameron Kaiser
wrote:
Pretty sure it was Hedy. "Hedley Lamarr" was a character in Blazing
Saddles, I thought?
The plant sang "How about a date with Hedy Lamar? You're gonna get it!"
--
David Griffith
dgriffi at cs.csubak.edu
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?
You might
check out Heddy Lamar,
Hedley.
5:39 a.m.
You might check out Heddy Lamar,
Hedley.
6563
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6 comments
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participants (5)
-
dgriffi＠cs.csubak.edu -
gordonjcp＠gjcp.net -
rdawson16＠hotmail.com -
spectre＠floodgap.com -
wdonzelli＠gmail.com