K3 - KEY OUT missing

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K3 - KEY OUT missing

Benny Aumala
Anybody with these symptoms:
With mike PTT (hard ground) I can easily command the amplifier through K3.
But with straight key or inbuilt keyer the KEY OUT is not grounding.
K3 itself sends OK.
Unfortunately I have not found schematic of back panel and the
power FET used in keying.
It also crossed my mind to have some switch wrong.

Benny   OH9NB
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