Hi Des
Thank you for documenting your results.? I found them to be very useful.??
When a good friend recently sent me a Version 2 QCX 80 kit to build, and being aware of this discussion, I decided to use your results as a starting point.? Accordingly, I wound as follows:
L1: 20 turns
L2: 23 turns
L3: 20 turns
L4: 22 turns
(In the case of L4, I went for 22 turns as a compromise between your results and the details given in the manual!)?
Anyway, with a supply of 13.5 volts, I got just over 4 watts out on 80 m.? This power output was initially measured on a Welz SP220 power meter, and confirmed by measuring Vpeak across a 50 dummy load with a Kenwood CS-6040 oscilloscope.? ?I was very happy with this result, and made no further changes.
Thank you, Des, for your contribution.
Best wishes, Steve
?
Steve Rawlings