Thanks for the comments. I now have a prototype solution running with a 4027 and a 4528 !! 73 Roger
-----Original Message----- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Edward R Cole Sent: 11 October 2016 05:50 To: Elecraft@mailman.qth.net Subject: Re: [Elecraft] Interlocking two K3 The simple fix is to move the 470-ohm resistors to be inserted between pin-1 and Pin-7. The resistor is used to limit current draw when pin-7 is grounded (inhibiting Tx). With pin-10 directly connected to pin-7, pin-7 will go directly to low when pin-10 does. If you want a little more insurance that current goes the correct direction add a diode pointing toward pin-10 from pin-7. I am using inhibit with my station sequencer (except with the opposite logic: INH=HI): http://www.kl7uw.com/TX-INHIBIT.htm also added a little more band logic for use with transverters and disables inhibit with HF. 73, Ed - KL7UW ----------------- From: "Val" <v...@vip.bg> To: <elecraft@mailman.qth.net> Subject: Re: [Elecraft] Interlocking two K3 Message-ID: <835760C8560A48D18E811EB243F91E3E@OFFICE> Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Charlie, how this could work after there is no way the TX Inh inputs to be pulled down? 73, Val LZ1VB > Roger: > Look at: > > http://www.kkn.net/~n6tv/SimpleElecraftK3SO2RLockoutCircuit.pdf > > I belive it's different than the one you described in your email. > I've > used this one successfully. > > 73 charlie, k1xx 73, Ed - KL7UW http://www.kl7uw.com "Kits made by KL7UW" Dubus Mag business: dubus...@gmail.com ______________________________________________________________ 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 Message delivered to li...@irdixon.plus.com ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2016.0.7797 / Virus Database: 4656/13187 - Release Date: 10/10/16 ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2016.0.7797 / Virus Database: 4656/13188 - Release Date: 10/11/16 ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
