[Elecraft] HF Digital interface for the K2...

[Jack Brindle]

I second Tom's comment. I built and installed one of Don's boards in  
my K2, feeding the audio to pin 4 of the front panel Mic connector.  
It provides a good fixed audio output that seems not to load the  
output of the detector. Now I can just plug the audio interface into  
the Mic connector and get everything the interface box needs.

I found it to be an advantage to not have the sidetone in that audio  
feed since the computer really doesn't need to deal with it. After  
all, if the computer is sending the CW, it already knows what is  
going out, right?

On Mar 10, 2007, at 9:35 AM, Tom Hammond wrote:

> Don Wilhelm, W3FPR, offers a really nice fixed output interface for  
> the K2.
>
> However, it may NOT offer output of the CW SIDETONE, since that  
> comes in on a different input port to the AF amp and is not  
> currently sampled by the fixed output amp.
>
> Contact Don at:  Don Wilhelm W3FPR <w3fpr at arrl.net>
>
> 73,
>
> Tom Hammond   N0SS
>
>
> At 11:18 AM 3/10/2007, Peter wrote:
>> Hi
>>
>> A small audio amp. and you have fixed audio level at the back.
>>
>> http://www.pi4cc.nl/personal/pc2a/k2/
>>
>> Peter
>> PC2A
>>
>> Tony Lyon schreef:
>>> Jamie,
>>> Thanks.... Being able to connect to the J5 connector looks like  
>>> it will do the trick. I looked
>>> in the K2 manual and I noticed that the J5 AF output is derived  
>>> directly  from pins 4 and 5
>>> of the NE602 product detector.
>>>
>>> So, my next question is:.
>>> Does the NE602  have enough output drive to drive the AF input of  
>>> a RigEXpert?
>>>
>>> 73,
>>> Tony Lyon (KJ5XF)
>>>
>>>
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>>
>>
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- Jack Brindle, W6FB
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