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Gudmundur · January 20th 08, 04:35 AM posted to rec.radio.amateur.homebrew

In article ,
says...

Does anyone in the group know anything about magnetrons? I planning to
do some experiments in transmitting microwaves.

I would like to use standard magnetrons from a microwave oven and
believe I can beam further if operated at the same frequency and
with the outputs in phase. I have no idea on how to do this. Please
advise

Cheers,
Bert

There isn't any hamband for the magnetrons you are likely to get
your hands on, so it would be illeagal for you to 'beam' anywhere.
Multiple mags don't like to 'lock up' very well in pulse duty and
you surely won't be running any microwave oven mags in cw mode.
How would you verify if your kluge monster was in fact locked
together? Got any ghz range spectrum analyzers handy? Most mags
designed to be used in parallel power production have a built
in injection probe with an SMA or BNC fitting right on the mag.
So you are going to be beaming, and receiving with what? A spark
gap? You don't need, and couldn't handle the power of multiple
magnetrons. You can blow up every solid state device in your workshop
just by tearing the front door off your microwave oven and jumping
out the interlocks. Do you realize the body of the magnetron is
the anode and you will probably electrocute yourself before I can
find a sound reason for anybody but a genuine rf engineer to try
putting two magnetrons in phase lock parallel operation? Far longer
would you live throwing 20 pound propane tanks into a fire and
see how far they 'beam'.