[amsat-bb] Re: AO-51 mode V/S

Bob- W7LRD w7lrd at comcast.net
Thu Sep 9 09:32:08 PDT 2010

Hello Matt 

There were a lot of converted MMDS converted downconverters from the the AO-40 (sobsob) days.  I have a couple I dearly cling to, with hopes of a future HEO.  There are some commercial ones from Keps, SSB http://www.ssbusa.com/modes.html .  and few others. These can be a bit pricey.  Try to find a AIDC 3731 downconverter by Transystems.  These were converted and sold by K5GNA again back in the AO-40 (sobsob) days.  They were an excellent dc and reasonably priced.  Once a dc is procured a tv type 18 inch dish with a 5 turn helix feed in front of it makes a super antenna.  A simple 8-16 turn helix is another option as well as yagi antennas used for wifi are effective.  There a many ways to work this problem.  If we had a HEO in the works this bb would be flooded with information, with lots of deals.  Good luck with your efforts.  Mode S on AO-51 is fun to experiment with. 

73 Bob W7LRD 

----- Original Message ----- 
From: "Matt Patterson" <mattpatt at 1starnet.com> 
To: amsat-bb at amsat.org 
Sent: Thursday, September 9, 2010 8:19:22 AM 
Subject: [amsat-bb]  AO-51 mode V/S 

I'm wanting to try this mode but haven't had much luck finding a 
downconverter.  What does everyone use?  Any leads as to where a 
downconverter can be purchased would be much appreciated. 

73 Matt 

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