[BLT] 10 GHz - I need help building a miniature beacon

[Friesenhahn, Randy [EPM/HOU]]

Ron:
I have some items that might help you with this project. I acquired some 10
Ghz Gunn Oscillators a few years ago. These oscillators have a SMA output. I
also have some amplifiers that operate at that frequency. I will have to
unpack them but I am sure that they will fill the bill for the project. The
problem comes is I have lost the spec sheet on them (Power supply voltage,
frequency drive voltage required ect.) This data should still be available
if I do a little research on the web and with maybe a few phone calls. I
think I have about 10 or so of these things so lets see what we can do with
them.
Randy

-----Original Message-----
From: Ron Sparks [mailto:rls@sparkles.com]
Sent: Tuesday, April 13, 2004 11:44 PM
To: blt@stevens.com
Cc: 'NTMS'; rmg@clarc.org
Subject: [BLT] 10 GHz - I need help building a miniature beacon


Hello all,

I am working to once again fit into the 20th South Texas Balloon Launch for
late this summer.  I am working on refining the video system which operates
on 1.255 GHz FM (temperature problems last year).

While am doing that, I would also like to build a miniature (i.e., 6-9 oz or
less) 10 GHz beacon to also launch with the package.  We use a solid cone
ground plane antenna for the ATV and a 10 GHz companion would be very small
and easy to build.

What I need help with is a design and components for the beacon itself.  It
does not need to have any smarts because there is spare processor power in
the on-screen display unit and I can use that to toggle a CW line.  So
basically I need plans for a very stable keyable oscillator with, ideally,
about 0.1-1 watt output.  Stability is an issue since the temperature can
typically change from 90F down to -40F in the first hour of flight.  High
efficiency is a plus.

Anybody out there who might Elmer me or maybe even have a concept that I can
build, if so please e-mail me directly at:

AG5RS@arrl.net

Any help will be appreciated.

73 de AG5RS, Ron



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