Re: [amsat-bb] Powering downconverters

[Doug Faunt N6TQS +1-510-655-8604 <faunt@xxxxxxxxx>]

   Date: Sat, 27 Jul 2002 20:16:40 -0400 (EDT)
   From: Stephan Greene <sgreene@patriot.net>


   I am trying to devise a better way to power 2.4 Ghz downconverters for
   AO40 reception during battery-powered portable operation.  110V AC to
   run the wall-warts is not available.

Apparently the 3731 can be easily modified to run with 12V
and that's what I'm planning on doing.


   I need to power either a Drake 2880 or Transystems 3731.  Both use 
   bias-t's to inject DC power into the feedline.  My DEM preamp is quite 
   happy with a 12V supply.

<deleted>

   - DC-DC converter (nominal 12V in 18V out).  Anyone have a schematic?

If you want to do this, check out the N4UAU web site
http://n4uautoo.home.sprynet.com for the "All Purpose Voltage Booster"
kit as described in an article in QST for July 1997

73, doug
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