Hi Igor,
you may want to check this very simple circuit:
http://www.kkn.net/~n6tv/SimpleElecraftK3SO2RLockoutCircuit.pdf
73, Olli - DH8BQA
----- Original Message -----
From: "Igor Sokolov" <ua9...@gmail.com>
Cc: <elecraft@mailman.qth.net>
Sent: Wednesday, March 27, 2013 8:28 PM
Subject: [Elecraft] K3 lock out via Inhibit
Yet again I need to organize lock out for a pair of K3s. Therefore couple
of questions for those who knows how to do it.
1)The manual says one need 2.2 to 10k pull up resistor on pin 7 of the ACC
connector from 5V source. There is no 5V source in ACC connector (BTW
Elecraft could easily provide one either on pin 12 or pin 5. Both of them
are now used for GROUND). The easy answer to the problem is to use 12V
out RCA socket on the back panel. Is it necessary to step down that 12V to
5V or it is safe enough to connect say 20K pull up resistor from 12V to
pin 7 ?
2) Is it OK to use Keyout-Lp from pin 10 of one radio to Inh pin 7 of the
other radio and vise versa. What I am concerned about is what happen if on
one of the rigs someone unintentionally switch the setting of pin 7 from
Inh to K3 ON?
73, Igor UA9CDC
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
-----
E-Mail ist virenfrei.
Von AVG uberpruft - www.avg.de
Version: 2013.0.2904 / Virendatenbank: 2641/6205 - Ausgabedatum:
26.03.2013
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
