In my opinion, I also have a slightly lower power output?than expected.
Using the online power meter, I ?have 5.2 watts on the drains of Q1, Q2 and Q3 (with both 9.5 and 11.3 V power source) and the following measurement across L1:
L1/L2 Junction = 3.3 watts (11.3V)? and?2.3 watts (9.5V)
L1/power output BNC socket = 2.0 watts (11.3V) and 1.5 watts (9.5V)
I understand these power measurements are not necessarily accurate values but serve for the purpose of comparison.
Robin,
The only one that has any chance of giving some sort of accurate indication is the final one.
The others are not into 50 ohms so really mean nothing.
I note the possible removal of turns from the inductances L1, L2, L3 and L4 but before embarking on this I would be interested to know which inductance did you find was the most critical and turns removed.
I think each has a small effect and all may require adjustment to make a significant difference.
Something somebody said off-list makes me wonder what current does the CQX take, RX and TX? Although perhaps that may mean nothing.
73 Alan G4ZFQ
