VA7ST Christman Phasing Calculator

Operating frequency:
Mhz
Coax velocity factor: Vf           

The 71-degree phasing line should be: ft or m

The 71-degree phasing line is 90 degrees at Mhz

Cut the coax to the suggested length plus a few inches, in case your velocity factor is not quite right.

Leaving one end of the coax open, set your RF analyzer to Mhz and trim the coax until you see minimum Z impedance. You now have a length of 71 degrees at your desired operating frequency.


Each 84-degree phasing line should be: ft or m

The 84-degree feedlines are 90 degrees long at Mhz

Cut the coax to the suggested length plus a few inches, in case your velocity factor is not quite right.

Leaving one end of the coax open, set your RF analyzer to Mhz and trim the coax until you see minimum Z impedance. You now have a length of 84 degrees at your desired operating frequency.