[Amps] PLATE RESISTENCE

[Will Matney]

Perzactly!

This is a good reason to note why tube amps using pi and pi-l networks 
are superior to broad band solid state amplifiers. The harmonic 
rejection of the networks are much greater assuring a cleaner signal. I 
always select a Q of 12 because it's midway between 10 and 15. I do this 
in determining wire size in transformers where 500 cir. mils is the 
lowest and 1000 the highest using 750 cir mils for ICAS work (1000-1200 
for CCS). This mid range is generally always acceptable for any circuit 
and is being conservative in value.

Even though the Q is a factor plugged into the formula, there are "Q 
meters" for testing the actual Q of a built component-network. After the 
tank is complete, or just the tank coil itself, the actual Q can be 
found with the meter and then compared to the value you arrived at from 
the formulas. Most LCR meters have the capacity to test the Q of a 
component or circuit. There are more accurate Q meters available though. 
So david is right on the money by his answer.

Will