[Moon-net] 144 mHz PA Cavity question

[Oene Spanjer]

Hello All,

I am preparing for buiding a 144 mHz amplifier with 2 x GI7b tubes.
I am thinking of the YU1AW design but want to change the dimension
of the housing.  I guess this means that the dimensions of the resonator
La also have to change ?
I also read articles of DK2DO and DJ9HO and in the schematics, there
are different kind of dimension meant for 1 GI7 with other types of housing.
Is there some kind of software available that can make the calculations ?
Any info or link about cavity's would be very much appreciated.
Thanks in advance !!

GL and 73
Oene
PA3CWN