[Amps] qb3.5/750 on six tank circuit question

[pe2six at xs4all.nl (Erwin Cremers)]

Dear readers,

I've been trying to get my qb3.5/750 or 4-250B amp to run on Six meter but keep 
having trouble with the tank circuit.

Has anyone an idear of the values that i should use to get the thing to run on 
six/50Mhz. I'm mainly interested in the Tank circuit. So the tune C value, the 
L (if posible with turns and diameter) and the Load C value.

Va = 1900 volt
Ia  = max 450 mA

I hope you can be of assistance.

Regards,

Erwin Cremers
PE2SIX