http://groups.yahoo.com/group/lcwn/ Low Cost Wireless Networking Fri, 10 Jul 2009 01:32:21 GMT thomasicom http://groups.yahoo.com/group/lcwn/message/1672 http://groups.yahoo.com/group/lcwn/message/1672 Via: http://ticom.livejournal.com/170845.html The time has come, the editor said, to talk of many things, Of scanning, surveillance, telemetry, Of fanciful Wed, 01 Jul 2009 10:00:10 GMT Dean von Germeten http://groups.yahoo.com/group/lcwn/message/1671 http://groups.yahoo.com/group/lcwn/message/1671 I can imagine running a maggie heater on steady DC from a battery, even 12V at modest amps should do no harm, at which point the -HV frequency would be the Wed, 01 Jul 2009 06:58:24 GMT multiplx@... http://groups.yahoo.com/group/lcwn/message/1670 http://groups.yahoo.com/group/lcwn/message/1670 It's still better to control the current into the magnetron for FM or FSK modulation. You can even phase/frequency lock them for narrowband operation. Wed, 01 Jul 2009 06:54:37 GMT multiplx@... http://groups.yahoo.com/group/lcwn/message/1669 http://groups.yahoo.com/group/lcwn/message/1669 Yes, I didn't think of that. The MOT is only designed to operate at 2,000 VAC so it is possible there was internal arcing to the transformer's core, even if Tue, 30 Jun 2009 04:04:47 GMT Dean von Germeten http://groups.yahoo.com/group/lcwn/message/1668 http://groups.yahoo.com/group/lcwn/message/1668 CW is what I intend. The file was eye-opening but sort of left me hanging, not knowing how much of those other measures re: phase- shift, etc. are necessary. Tue, 30 Jun 2009 04:02:00 GMT Dean von Germeten http://groups.yahoo.com/group/lcwn/message/1667 http://groups.yahoo.com/group/lcwn/message/1667 Thank you for the suggestions. I'll take your word that what you advise would possibly help the measurement problem, but I really can't afford to reduce Tue, 30 Jun 2009 00:39:41 GMT multiplx@... http://groups.yahoo.com/group/lcwn/message/1666 http://groups.yahoo.com/group/lcwn/message/1666 In theory, you should be able to turn off the filament once the magnetron is up and running using back-bombardment to heat the filament/cathode, but my only Tue, 30 Jun 2009 00:34:09 GMT multiplx@... http://groups.yahoo.com/group/lcwn/message/1665 http://groups.yahoo.com/group/lcwn/message/1665 The magnetron's filament doesn't have be from the transformer's secondary. You can run the filament off a 3.6 V battery pack from a cordless drill or similar. Mon, 29 Jun 2009 15:40:02 GMT Dean von Germeten http://groups.yahoo.com/group/lcwn/message/1664 http://groups.yahoo.com/group/lcwn/message/1664 I'm working on way to run a magnetron from a 12V car battery. (I know I could use an inverter for this but trying to go with something simpler and cheaper.) Mon, 29 Jun 2009 13:27:50 GMT Dean von Germeten http://groups.yahoo.com/group/lcwn/message/1663 http://groups.yahoo.com/group/lcwn/message/1663 Whoever posted the magnetron.pdf file, thank you! Is there a way to turn off filament current from the driver, with the buck-boost coil, once the maggie is Wed, 31 Dec 2008 15:46:27 GMT thomasicom http://groups.yahoo.com/group/lcwn/message/1662 http://groups.yahoo.com/group/lcwn/message/1662 Perhaps. Email the TAP staff with a suggestion. tapzine@... Tue, 30 Dec 2008 15:07:10 GMT Jim Tarvid http://groups.yahoo.com/group/lcwn/message/1661 http://groups.yahoo.com/group/lcwn/message/1661 There must be a better way to distribute than rapidshare. ... -- http://ls.net http://drupal.ls.net Tue, 30 Dec 2008 13:57:50 GMT thomasicom http://groups.yahoo.com/group/lcwn/message/1660 http://groups.yahoo.com/group/lcwn/message/1660 http://tapzine.livejournal.com/ Thu, 14 Aug 2008 00:12:15 GMT thomasicom http://groups.yahoo.com/group/lcwn/message/1659 http://groups.yahoo.com/group/lcwn/message/1659 http://sigint860.blogspot.com/ Enjoy! Fri, 20 Jun 2008 01:48:32 GMT thomasicom http://groups.yahoo.com/group/lcwn/message/1658 http://groups.yahoo.com/group/lcwn/message/1658 Cybertech 'Zine Issue #25 now out. Mostly preparedness-related stuff in this one. http://www.digivill.net/~ticom/