Shel,
Keyout is on RF Board sheet 1.
Is your problem only from the internal keyer? In other words, does it
work when you use a hand key or computer keying?
If also a problem from a hand key or computer keying, then what is the
DC voltage at the gate of Q3 during keydown - should be almost 12 volts.
Do you have 7 volts on the gate of Q5 during receive?
The Keyout is a simple circuit consisting only of Q3 and Q5 - when in
transmit, the 7R input should go to near zero, and that should make the
gate of Q3 go to a high voltage (almost 12 volts) - that is all there is
to it.
73,
Don W3FPR
On 3/8/2018 4:42 PM, Shel Sherman wrote:
Sent from Mail for Windows 10
My K3 does not pull the key out line to ground when pulsed by the internal
keyer, I need some help in tracing the circuit on a schematic.
Shel Sherman WO0C
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