Jim - congratulations!!! But not only a working QMX - also one with a PA efficiency of more than 100 %!!! ;-))
Maybe the current value is not so exact.
So, as you saw with those last sweeps, the they show that all the "sweet spots" are in the high end of the bands. How can I get them lowered?
For rf sweep the signal is going through LPF AND BPF. Which is it?
You could make a LPF sweep to check the throughput for LPF only. If the band frequencies are not attenuated so it should be the BPF. To lower the the pass trough you should increase the inductance. If possible spread the turns more over the whole toroid.
Looking at the current sweeps I think they are not all bad.
80 m: - 13 dB are not so good, but high noise on the band so maybe ...
60 m: - 7 dB are not so bad
40 m: - 2 ... - 3 dB are fine
30 m: - 5 dB is ok
20 m: - 9 dB are a bit much
Start with the highest band and with the part of the winding in use for all bands (the part direct connected to Q508, "0 - Start" I think).
Btw, thanks for the fantastic teamwork. I enjoyed all the time.
73, Ludwig
