Hi, There is(was) a 26dB lna in that antenna. --    Björn Sent from my smartphone. -------- Original message --------From: Magnus Danielson <magnus@rubidium.dyndns.org> Date: 20/11/2016 21:42 (GMT+01:00) To: time-nuts@febo.com Cc: magnus@rubidium.se Subject: Re: [time-nuts] L1 L2 choke Ring Question Tom, If I recall correctly, that antenna element is passive and I expect there to be an amplifier there. The antenna element you can find separately on ebay. Cheers, Magnus On 11/20/2016 08:48 PM, Tom Knox wrote: > I recently purchased a used L1 L2 Choke ring antenna AeroAntenna AT2775-20W-000-05-26-NM, it has an AT2775 aircraft antenna with a 3.3" x 1.8" bolt pattern at it's heart. > > Sadly the antenna is dead. I have been looking into the possibility of replacing the aircraft antenna portion and was wondering what the critical specs were and the approximate tolerances. I found an antenna from another manufacturer with the exact bolt pattern, but it appears the phase center is 1-2mm lower. > > Any thoughts would be greatly appreciated. > > Or if anyone has a AeroAntenna AT2775 aircraft antenna with a 3.3" x 1.8" bolt pattern they would be willing to sell or trade contact me off list. > > Thanks! > > > Thomas Knox > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.