K2 issue

[John Wiener]

My K2/100 5312 started a new "thing" today.  On PSK (my primary  
mode), it hangs up after xmission...i.e., in a "mute" mode...no power  
showing on external wattmeter and no audio.  I must turn off and on  
radio to get receive.  QSK CW is fine.
Did I blow a diode or is this a software/interface issue?

Thanks

John
AB8O
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[Don Wilhelm-4]

John,

Check to see if your CW dot paddle is being closed for some reason or
other, or if your PSK interface is holding the PTT line active. (in the
K2 both the dot input and PTT are the same).
Without changing any of your settings, try connecting a microphone to
the K2/100 and transmit voice - that is the same as transmitting PSK
except the 'tones' are not the same.   If it behaves with the
microphone, suspect something in your interface box.

If neither of those quick tests reveal any problem, the next step is to
open the K2 to make some measurements while it is misbehaving.  First
measurement would be to measure the state of the 8R and 8T voltage rails
to see if it is 'stuck in transmit'  Those points are conveniently
available at the anodes of D6 and D7 - D6 is driven by 8R and D7 is
driven by 8T.

73,
Don W3FPR

John Wiener wrote:

> My K2/100 5312 started a new "thing" today.  On PSK (my primary mode),
> it hangs up after xmission...i.e., in a "mute" mode...no power showing
> on external wattmeter and no audio.  I must turn off and on radio to
> get receive.  QSK CW is fine.
> Did I blow a diode or is this a software/interface issue?
>
> Thanks
>
> John
> AB8O
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
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