[Elecraft] K3- external keyer problems

[Brian Alsop]

Hi Keith,

Unfortunately no bug.  

Now that you mention it, it kind of sounds like a bug when one holds the 
dit side down for a long time.   After a number of dots, each gets to 
sound longer and longer and more slurred.

For what it is worth,  the computer interface to KEY in uses an NPN 
transistor.  The keyer uses a 2n7000 FET.  The FET on state has a really 
low voltage drop.  K3  Key terminals have an open circuit voltage of 4.7 
V (would have expected closer to 5).   The K3 displays a power-in 
voltage of 13.7V.     Have removed all connections to the K3 but 
earphones and KEY.   Problem does not go away.

Wierd.

73 de Brian/K3KO

Darwin, Keith wrote:

>OK that's what I thought.  I think about the KEY IN as the input for
>bugs & straight keys and was slightly confused by calling it the
>external keyer input :-)
>
>Do you have a bug you can try on that input?
>
>- Keith N1AS -
>- K3 711 -
>
>-----Original Message-----
>From: elecraft-bounces at mailman.qth.net
>[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Brian Alsop
>Sent: Friday, January 16, 2009 8:13 AM
>To: elecraft at mailman.qth.net
>Subject: Re: [Elecraft] K3- external keyer problems
>
>KEY IN for external keyer (paddle connected to external keyer, keyer 
>output keying FET to key in)  ,   PADDLE  connected to paddle input for 
>internal keyer.   
>
>73 de Brian/K3KO
>
>Darwin, Keith wrote:
>
>  
>
>>I'm confused.  Which key jack are you plugging into?
>>
>>    
>>
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