Calculate RF amplifier pi coupler

This calculator calculates the values of a pi coupler for a valve RF amplifier. It uses the method and formulas in CPI/Eimac's Care and Feeding of Power Grid Tubes.

SVN:

The calculator does not do a lot of error checking, if you enter nonsense, it will produce nonsense. If the specified Qw is too low for Rin and Rload, no results can be calculated. NaN means not a number, check the input values. The calculator assumes lossless components.

Table 1: Input field descriptions
Input field	Meaning
Rin	The impedance looking into the network, the required resonance load impedance for the valve(s)
Rload	The external load to be transformed
Qw	Working (or loaded) Q

Changes

Version	Date	Description
1.01	23/05/2011	Initial.
1.02
1.03
1.04
1.05

Inputs:
Frequency (MHz)
Rin (Ω)
Rload (Ω)
Qw

Results:
C1 (pF)
L (µH)
C2 (pF)

Calculate RF amplifier pi coupler

Links

Changes