[Elecraft] K3 TX Inhibit

[Win Kriegl DK9IP/KH7CD]

Hi John,

when TX INH ist set to LO in the Menu an external pull-up resistor 
between abt. 2.2 to 10 kOhm (to 5 VDC) is required at pin 7. This should 
solve your problem. See also K3 owner´s manual.

73, Win DK9IP





Am 02.12.2011 20:35, schrieb John Lemay:
> Hello
>
> I have a question about the TX INHibit function of the K3.
>
> I want to use this with an external sequencer to ensure that my rig,
> amplifier and masthead preamplifier (on 2m) are controlled in a safe manner,
> and that even pressing the XMIT button or turning on VOX does not lead to a
> mishap.
>
> However, TX INHibit does not work as I expected:-
>
> I have turned on TX INH with LO = INH. I have plugged a lead into the 15 pin
> accessory socket so that pin 7 can be held low (in my test case, connected
> to earth). That works fine and TX is inhibited (indicated by the flashing TX
> icon).
>
> When I remove the earth connection from pin 7 the rig remains with TX
> inhibited - that's the bit I don't understand.
>
> I can only get back to normal transmit operation by going back into the
> CONFIG menu and turning off TX INH.
>
> What am I missing ?
>
> Regards
>
> John G4ZTR
>
>
>
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