Ahhh another AO-40 comment. I used a old and still have in operation an old TS-700A 2M xcvr with the tx disabled. This was, and is my designated S band receiver. Speaking of S band when will AO-51 be back in that mode. If even for a few days, it's fun to play with that stuff.
73 Bob W7LRD ----- Original Message ----- From: "Greg D." <ko6th_g...@hotmail.com> To: k7trkra...@charter.net, amsat-bb@amsat.org Sent: Wednesday, February 16, 2011 9:56:50 PM Subject: [amsat-bb] Re: pre amp help.. As others, SSB Electronics model that is RF switched. I *have* transmitted 100+ watts into it, though not on purpose, and it works just fine. I got the RF switched model as a "just in case" bit of insurance, and am glad I did. It's been reported here a few years ago that sometimes there's a little "burp" of RF that squirts out when a transceiver is powered up. Seems unlikely , but if so, maybe that did it? If I recall, the discussion was about people frying their AO-40 S-band down converters by accidentally transmitting into them. An somewhat less certain recollection is that someone came up with a simple circuit that would clamp the RF to a more forgiving, if not totally safe level. As an alternative to an RF switched preamp model, perhaps a stroll through the archives might net a different solution. Good luck, Greg KO6TH > From: k7trkra...@charter.net > To: amsat-bb@amsat.org > Date: Wed, 16 Feb 2011 13:59:41 -0800 > Subject: [amsat-bb] pre amp help.. > > I just sent my ARR pre amp back to ARR for repair for the 3rd time ! > > (pretty sure I did not tx through it ) > > What are people using for pre amps. I only see the Mirage as an alternative. > Any other choices. I'm kind of disappointed in ARR products. > Is there a pre amp that you can tx through preventing accidental frying? > > Any thoughts appreciated > > 73, Ted, K7TRK > _______________________________________________ > Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
