[Amps] dual cavity

[John Lyles]

Yes, you can. Tune them into 50 ohm load individually. I prefer using 90 
deg combiner like a branch (ring), or coupled line hybrid. Since you
are dealing with a narrow band amp, these are fine, and you get away 
from the 100 ohm balanced resistor of a Wilkinson device. Being 4 port 
hybrids, you put a 50 ohm load on #4, and you can watch for wasted power 
when your amplifiers are not equally making power. I am combining two 2 
Megawatt VHF cavity amps right now this way, and not into a perfect load 
of an antenna or dummy. 73
John
K5PRO

> Message: 1
> Date: Wed, 9 Apr 2014 00:52:53 +0000 (UTC)
> From: Paul Decker <kg7hf at comcast.net>
> To: amps at contesting.com
> Subject: [Amps] dual cavity
>
> I'm making some good headway on my projects here, so time to throw out another question.
>
>
> I have two 2c39 cavities, is it possible to use a Wilkinson combiner or some other method to parallel them up?  How would the individual load and tune work with a configuration like that?
>
> It seems to me I could tune them each into 50 Ohms and then put the combiner on and be pretty close.
>
> thanks in advance for the spring board,
>
> Paul
> kg7hf