[Elecraft] KX3 production firmware release (MCU rev 0.91) and new

[Wayne Burdick]

I'd use 2.2 K, but anything between 1 and 10 K should also work.

Wayne

On Apr 14, 2012, at 5:57 PM, Lance Collister, W7GJ wrote:

> WOW!  That would be a GREAT option!
>
> I just measured the serial output from the USB cable on my laptop,  
> and I have -6.23 on receive and +6.8 VDC on transmit between the RTS  
> (7) and Signal Ground (5) lines.  If it would work to simply stick a  
> 1K or 10K resistor in series with the RTS line, it sure would be a  
> lot more compact and fit better into a connector than resistors and  
> 2N2222 ;-)  MNI TNX for all your work!  VY 73, Lance
>
> On 4/15/2012 12:38 AM, Wayne Burdick wrote:
>> Lance Collister, W7GJ wrote:
>>
>>> Good news about the PTT IN on the ACC2IO ;-)  I assume this will  
>>> cause the KX3 to go into TX when the tip of ACC2 is  
>>> grounded...correct?
>>
>> Yes.
>>
>>
>>> Any plans (if even possible) to offer the menu option make the KX3  
>>> go into to TX when the tip of ACC2 is HIGH (so it would work  
>>> directly off the RTS serial port line when it goes high for TX)?
>>
>> I could provide both LO=PTT IN and HI=PTT IN options. Good idea.  
>> Note that this is 3-V logic (but 5-V tolerant). Anything outside  
>> the range of 0-5 V would require clamping or a large current- 
>> limiting resistor.
>>
>> Wayne
>>
>>
>>
>
>
> -- 
> Lance Collister, W7GJ
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