[Elecraft] K3 and N1MM

[Bob]

Hi Don,

            OK, I was not sure about the K3 but threw it out there as 
food for though.   Maybe my choice of terminology was wrong  but I'm 
pulling both the Dash "and" Dot  lines low through the diodes with the 
straight key contact and do the same with the K1EL. The K2 does the 
auto-detect.   It is active low with the key so maybe  NAND ?    Or, and 
I'm not trying to be facetious, did you mean that the different devices 
are logical OR'ed .  I actually have 4 devices that can key the K2 in 
parallel.  I didn't see any need to diode isolate them, only to combine 
the separate dot & dash lines for single line keying.

             Works fine,  but explanation may be lacking.

73,
Bob
K2TK       

Don Wilhelm wrote:
> Bob,
>
> You will not be able to use the 2 diodes (BTW, that is a logical OR 
> function - it is 'active low') with the K3.
> The K3 has a KEY input in addition to the PADDLES input.  You can 
> connect the paddles to the paddle input, but you will have to add a 
> cable to the straight key to run to the KEY jack.  Yes, you should be 
> able to connect the straight key and the computer keying line in 
> parallel.
>
> 73,
> Don W3FPR
>
> Bob wrote:
>> I'm going a little out on a limb here as I don't know if the K3 has 
>> the same feature as the K2 does.
>>
>> The K2 acts as it is in a straight key mode if both Paddle lines are 
>> pulled down at the same time.
>> I use a old Brown Brothers that has a straight key and paddle on it.  
>> The straight key has two diodes
>> to "and" the lines so it can be used or the K2 internal keyer.  Also 
>> using a Radio Shack Y connector and
>> diodes "And"'ing  also lets the K1EL USB keyer key the K2.   In 
>> addition the K24U program
>> can trigger the K2 memories.  The K1EL also has its own paddle.  Any 
>> can be used at any time.  The only
>> exception to that is that only one program can use the serial port to 
>> the K2.
>>
>> That has not been a problem for me but if it were possibly a work 
>> around could be with one of the virtual
>> serial port emulators.     So far I've been happy with this flexibility.
>>  
>> 73,
>> Bob K2TK
>>  
>