[Elecraft] K3 Key out

[Don Wilhelm]

Phil,

What is the possibility that you damaged the K3 KEYOUT by connecting the 
negative voltage to it?

Check with an ohmmeter connected across the KEYOUT jack on the K3 - put 
the K3 in TX TEST just to be safe.  If it reads close to zero ohms with 
no respect for keyup or keydown (or PTT or TUNE), then the driving 
HEXFET has been damaged.  OTOH, if the resistance is high during keyup 
periods, then there must be some fault with your cable or its connectors.

73,
Don W3FPR

Phil LaMarche wrote:
> I've had many wonderful emails with suggestions and I thank you.
>  
> Let me be more specific:  The Amp Keyer works OK.  The 30L-1 keys OK.  
> The tested cable coming out of the Key Out on the back of the K3 isn't 
> working properly.  It's in the closed position.  If I take the other 
> end of the cable from the Key Out and plug into the amp keyer, it keys 
> it without my keying the K3.  If I hook it direct to the 30L-1 it keys 
> the amp.  I'm presuming the circuit is faulty in the K3?  Ideas?
>  
> Phil
>