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 arch...@mail-archive.com
