Has anyone details or thoughts of these
circuits?
I am very curious of personal experiences with
performing power combination with two transmitters.
Regards,
Scott
Hello Scott.
Couldn't get into the link this morning....
Spooky........I've just built a wilkinson splitter today for
67MHz.....
I have made wilkinson splitters for a variety of frequencies but never as
low as 136kHz.
The standard UHF / microwave wilkinson is made with two quarter
wavelengths of transmission line. 75 Ohm coax or the microstrip equivalent is
the norm. No chance for that on 136kHz (or drums of cable!) The
cable idea works well from 10m to 70cms above that microstrip normally
takes over.
The other technique is to put the usual balancing resistor of 100
Ohms between the two 50 Ohm sources (same phase) with a capacitor of
XC 70 ohms to ground on each source. The two signals to be combined
are then each fed through an inductor also XL = 70 ohms and joined at the far
end.
The final component is a capacitor of XC 35 Ohms from the junction to
ground.
All you are doing with the capacitors and inductors is simulating the
properties of a quarter wave length of coax, but with discrete components.
I've run 250 Watts like this and seen it done to 600W from 2 300W sources
on 2m.
I look forward to seeing how you get on
Good luck
David G0MRF
