Re: High voltage standing waves with a magnetron?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "mercurus2000" <mercurus2000-at-cox-dot-net> 

Why not just use one of those mini HV DC supplies? Like say a small flyback
supply with a fullwave rectifier, not alot of power but enought voltage,
along with a resistor, that's what I was planning on using.

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, February 04, 2004 7:17 AM
Subject: RE: High voltage standing waves with a magnetron?


 > Original poster: "Philip Chalk" <phil-at-apsecurity-dot-com.au>
 >
 >
 >
 > Frankly, I don't know enough about magnetrons to be authoritative, but I
 > would expect one to oscillate when fed from a current-limited supply of
 > the appropriate voltage.
 >
 > I'm not suggesting it's simple, but it's certainly possible to build
 > such a supply."
 >
 > Simple enough - just a series resistor!  Note that the magnetron
 > volt/ampere curve is not like a Zener diode (battery in series with a
 > low-resistance diode, but that it also has a series resistance. I
 > couldn't find an oven magnetron characteristic data sheet in a Google
 > search but came up with a lot of hits on non-oven uses, primarily ham
 > radio.
 >
 > Ed.
 >
 >
 > Hi Ed, all,
 >
 > Granted, but it would have shocking regulation.  In order to limit the
 > current to the extent required, (using the normal MWO supply) most of
 > the voltage would appear across the resistor, & it would need to
 > dissipate several hundred watts.
 >
 > I was thinking more along the lines of a voltage & current regulated
 > supply, or the normal MWO supply followed by a current regulator, or
 > constant-current source.  Your series resistor approximates a constant
 > current source, but with awful voltage regulation.
 >
 > Phil Chalk.
 >
 >