Chris,
Check T4 very carefully - does it have the correct number of turns? Is the
correct winding inserted into the correct holes? Are the links present and
soldered into the correct holes?
Your bias voltage is a bit high - check to be certain Q11 and Q13 have the
expected DC voltages (see the DC Voltage chart in Appendix E of the manual).
Examine all components in the base of Q7 and Q8 (see the schematic to
identify all the components) and verify that they are correct.
73,
Don W3FPR
> -----Original Message-----
>
> Dear group!
>
> We have a serious problem with our 10watt PA of my K2.2 weeks ago
> the 10w PA suddenly didn´t work any more.A friend helped me to
> fix the problem(we replaced the PA transistors 3 times), but now
> we need your help.The PA needs far too much current and the
> maximum power output on all bands is 2 watt.Everything seems to
> be okay, but the current of the bias of Q7/Q8 is 0.656V instead of 0.600.
>
> The PA transistors and the diodes of the low pass filter are
> okay too.Can you please help?
>
> vy73, Chris-OE5CSP
>
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