[Elecraft] TX inhibit question

[Cady, Fred]

Hello Erwin,
Pin 7 is connected to the front panel microcontroller with a series 220 ohm resistor. The microcontroller on the front panel is a 5 volt part so I wouldn't apply any voltages greater than 5 volts (or the maximum logic high voltage.)

73,
Fred
KE7X

Fred Cady
fcady at ieee dot org 
"The Elecraft K3: Design, Configuration and Operation"
www.ke7x.com

(Lulu has 20% discount for the K3 book until midnight 9/9 - SEPTEMBER305 - and 15% through 9/30 - AWESOME305. See www.ke7x.com.)


> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net [mailto:elecraft-
> bounces at mailman.qth.net] On Behalf Of DK5EW
> Sent: Friday, September 09, 2011 8:22 AM
> To: Elecraft at mailman.qth.net
> Subject: [Elecraft] TX inhibit question
> 
> Hi all,
> since 05.September I'm proud owner of a K3 # 5776.
> Now I work trough the manual from side 1 to end to understand function.
> 
> As I use a sequencer to protect my LNA's I will use also the RX inhibit
> function.
> The sequencer will provides 13VDC  in RX mode to the ACC connector  at
> pin 7.
> I understand I have to set CONFIG: TX INH to high. But can I use 13VDC
> to that pin 7 or better
> what's the maximum voltage can be there at pin 7?
> 
> --
> best regards
> Erwin/DK5EW
> 
> 
> 
> 
> 
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