[Elecraft] K3 lock out via Inhibit

[Igor Sokolov]

Yes, thank you Olli. The only problem being that if both stations try to TX 
then none of them will.

73, Igor UA9CDC

----- Original Message ----- 
From: "Oliver Dröse" <droese at necg.de>
To: "Igor Sokolov" <ua9cdc at gmail.com>
Cc: <elecraft at mailman.qth.net>
Sent: Thursday, March 28, 2013 7:51 PM
Subject: Re: [Elecraft] K3 lock out via Inhibit


> 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" <ua9cdc at gmail.com>
> Cc: <elecraft at 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
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>