Re: High voltage standing waves with a magnetron?

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

Original poster: "Virtualgod" <mike.marcum-at-zoomtown-dot-com> 

This is stretching it a bit, bit if they were 4 D-sized lithium ions (or,
better still, rechargable zinc-airs, if one could find some) that would
crank out about 4.8v -at- 10-20A for a short while.
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Tuesday, February 03, 2004 7:24 AM
Subject: Re: High voltage standing waves with a magnetron?


 > Original poster: Ed Phillips <evp-at-pacbell-dot-net>
 >
 > "What if there isn't enough current? I was planning on powering it with
 > a
 > very small high voltage DC supply. I saw on one website a guy built a
 > handheld herf where the entire appratus fitted inside the magnetron
 > casing
 > and was powered by 4 D batteries, it of course was pulsed by charging up
 > a
 > small array of caps at 7000 volts, but it was safe enough for him to
 > hold it
 > during operation and place his hand right above the transmitter."
 >
 > That doesn't sound right.  How could he power the heater from "4 D
 > batteries"???  As for operating at lower power by reducing the operating
 > current (series resistor is simplest as it doesn't require heating the
 > cathode from a separate filament transformer), that will
 > indeed                    work over a pretty wide power range.  I have
 > some little X-band pulse magnetrons here which were rated for about 1 kW
 > peak.  I can run them quite stably at powers of less than a watt.
 >
 > Ed
 >
 >