I'm not saying its safe. I'm just saying its a lot safer than MOT that isn't ballasted at all.
You can ballast one MOT with another mot. You can add in all kinds of things to keep the current limited. But I wasn't saying that its safe to play with. When is 2kV ever safe to play with? I never take playing with high voltage for granted. Obviously everything has to be thought of. I'm not suggesting doing anything or seriously using a MOT for anything. I highly recommend against it. Sent via BlackBerry by AT&T -----Original Message----- From: "John Miles" <jmi...@pop.net> Date: Sun, 17 Jan 2010 18:04:31 To: Discussion of precise time and frequency measurement<time-nuts@febo.com> Subject: Re: [time-nuts] 4 KV Power Supply Recommendations This is just nuts. A light bulb in the primary side will not render a microwave oven transformer safe, either to an ion pump or to you. If you're lucky, by the time the filament comes up to temperature and starts to limit the current, the ambulance will already be on its way. Just feed it 100 uA to 1 mA for a few days and let the current come down on its own. You're going to have to repeat the application anyway as soon as you power up the Cs oven, so you might as well rig up something safe and sustainable. -- john, KE5FX > -----Original Message----- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on > Behalf Of john.fo...@gmail.com > Sent: Sunday, January 17, 2010 5:55 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] 4 KV Power Supply Recommendations > > > The lightbulb wattage can be selected accordingly to limit the > current as needed. > > You'll notice if you dead short the seconday, the light bulb will > glow brightly, but that you won't be lighting your MOT on fire > like you would if you had no current limting. > Sent via BlackBerry by AT&T > > -----Original Message----- > From: Bob Camp <li...@cq.nu> > Date: Sun, 17 Jan 2010 20:33:16 > To: Discussion of precise time and frequency > measurement<time-nuts@febo.com> > Subject: Re: [time-nuts] 4 KV Power Supply Recommendations > > Hi > > You also could leave the windings as is and feed the secondary > voltage into a voltage multiplier. Still not very safe to wire up. > > If you did wire it up, the available current would be pretty > massive. I certainly would not attach it to an ion pump I cared about. > > Bob > > > On Jan 17, 2010, at 6:53 PM, Stanley Reynolds wrote: > > > > > > > > > > > ----- Original Message ---- > > From: Chris Stake <st...@btinternet.com> > > To: Discussion of precise time and frequency measurement > <time-nuts@febo.com> > > Sent: Sun, January 17, 2010 5:05:01 PM > > Subject: Re: [time-nuts] 4 KV Power Supply Recommendations > > > > What is the operating voltage of the magnetron in a domestic > microwave oven? > > Although VERY HAZARDOUS, it might be possible to adapt the PSU > from an old > > one? > > Chris Stake > > > > Yes, if you remove the transformer shunts and the filament > windings and add more primary windings in the space you would get > about 2700v with a full wave bridge. You also need to lift one > side of the secondary that is grounded to the frame. Yes very > dangerous and yes I'm luck to be able to tell. > > > > Stanley > > > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
