On Monday 14 July 2003 06:23, Dr. William J. Schmidt, II wrote:
> What you suggest works fine... as long as the amps remain in phase (e.g.
> make sure the input and output coax lines from the splitter and to the
> combiner are same length). Don't bother with the resistors on the
> combiner... being tube amps, SWR on the working amp when the other fails is
> tolerable for a short period (whereas transistor amps would go south almost
> immediately). CCI's combiners are a little under-rated... meaning they are
> a little small for CCS power. I've used several of them on transistor
> projects with great results up to about 4 kW.
I wouldn't go without the resistors - they aren't there to control the VSWR
that the amps see, they are there to provide isolation between the amps.
Without resistors, you can have the makings of a very destructive oscillator
and their cost in relation to the whole project.
Steve
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