[600MRG] Sweeping the RFPA final...

[Dave Riley]

Rewound and swept output toroid of PA, traces of 'snivits' and 
'barkhausen' are gone...

Hexfet drains see primary of output toroid in 6:10 turns 50 ohm output...


WSPR 120 hz. sideband spikes now down to -52db vs. started troubleshoot 
at -30 then performed one order of ' sweep the PA '...
Output toroid running room temperature now @ 48 watts out, reactances 
down to near j0, R=50+/- good return loss...

Reduced number of total turns on the litz loop transformer pri/sec... 
Same ratio, way less many turns...  loop is 22 ohms primary and 50 ohm 
secondary...

What are your favorite drain snubber RC values??   10 ohms and .0015 here...

?? QC, DaveR AA1A