Wayne, To carry this one step more, what about when I am running multiple K3's on different bands at the same time? Do you recommend to use external receive bandpass filters on the receive lines if I am using receive antennas on the Receive Antenna and/or Aux input? And also use transmit bandpass filters on the transmit antenna input when I am using the transmit antenna for both receive and transmit?
73, N2TK, Tony -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of wayne burdick Sent: Tuesday, December 16, 2008 1:58 PM To: Dr. James C. Garland Cc: [email protected] Subject: [Elecraft] Re: Question re K3 diversity reception Dr. James C. Garland wrote: > In using my K3 for diversity reception, I use my G5RV antenna on the > AUX subreceiver input, and my SteppIR for the main > (transmitting/receiving) antenna. When Im transmitting, does the K3 > short the input to the subreceiver AUX input, or otherwise protect the > input from damage? Im using an amplifier, and the G5RV probably has > many volts of RF induced on it when Im transmitting, and I dont want > to damage anything. Sorry if this has been covered before or, worse, > if the answer is in the manual. Hi Jim, The KRX3's AUX input is protected by a gas-discharge tube, bleeder resistor, and carrier-operated relay. It is very unlikely to be damaged. However, activation of the COR (which you would hear as you key the rig, etc.) can be disruptive to T-R sequencing. If you hear the COR relay go on, I'd strongly suggest that you either reduce the coupling between the two antennas or provide external switching or shorting (this could be done via the KEY OUT jack on the K3). 73, Wayne N6KR --- http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
