SOLVED
After I fixed SWR bridge transformer, output has changed (and increased) on all bands.
With a fully charged Li-Pol battery and dummy load:
80 meters: 6 W out
60 meters: 6.5 W out
40 meters: 5 W out (~5.2 est. on 20 W scale)
30 meters: 5 W out (~5.1 est. on 20 W scale)
20 meters: 4.5 W out
Obviously, I have to think about the Si diode trick for a fully charged battery. Optimum supply voltage seems to be 11 volts, only 5 MHz output is then 6 watts, the rest is 5 watts or less.
73, de Jindra OK4RM
