[Boatanchors] James Millen 90800 exciter/transmitter

[John Saxon via Boatanchors]

A good day to all:

I am getting a Millen 90800 going.  I hope someone out there is an expert :-)

Got it putting out rf, but the oscillator plate tank cap is at minimum capacitance, and according to my materials should be about 80% of maximum.

On the transmitter there is a (looks like) mica trimmer from plate of 6L6 oscillator to grid of 807 final.  It shows on the Millen schematic, but I don't see any word about adjusting it.  In the original QST article (November, 1940) it does not show a trimmer there, but a fixed 20 uufd cap.

Any words of wisdom?

Thanks & 73,
John
K5ENQ