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Date: Thu, 01 Jan 2009 13:59:12 -0800
From: Scott Tilley <sthed475@telus.net>
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Subject: Re: LF: Re: JT65A and narrow modes
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Hi David and All
Although not LF related LASER DXing does share alot of common problems
and solutions.
Here's a couple of links to some of the developments in the LASER DX area:
http://mail.rochester.edu/~af006m/LaserScatter.html
http://www.k3pgp.org/laserscatter.htm
I have here a 35 laser diode array at 100mW each that will someday
become my laser EME rig... A big project but lots of fun :-)
Hope you find this interesting.
73 Scott
G0MRF@aol.com wrote:
> In a message dated 31/12/2008 22:36:57 GMT Standard Time,
> sthed475@telus.net writes:
>
> Hi David
>
> I've used JT65 to listen to cloud backscatter as well with a small
> laser
> radar system I built. If only someone else out here had such a
> rig :-)
>
> 73 Scott
>
> Hi Scott / Gary.
>
> I have tried JT65 and some early versions of the mHz bandwidth
> modulation systems using soundcards and lasers. Unfortunately the
> soundcard program, which was presented a couple of years ago at a
> microwave update by its US originator, suffered from drift in the
> soundcard reference oscillator.
> At the time I wondered if the system would work for LF, but given the
> problems I encountered with the laser, I didn't try to adapt it.
>
> Although I do have a 20mW laser TX, I can't try any cloud bounce from
> here as my QTH is only 5km from Heathrow airport.
>
> HNY
>
> David G0MRF - ( Best 2 way laser DX = 76.8km in good ol' CW)