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Frank:
Lol, it is catching huh? Almost without doubt, what was tearing up my am radio was the signal being fed on the B+ rail (~1Mhz run by a "chopped" supply--and most likely leaking some signal onto the house mains--I am guilty of not making those suspicions clear)... however, their intent was to jam wireless wans/lans--from what I heard--they were/are more than successful... I know there was great experimentation here in trying to get a microwave magnetron "rock stable"--when that failed it lead to the "other" experimentation... Just in case there is something to this--be careful when and where you operate it...I think it just might surprise you... Warmest regards, John "Frank" wrote in message news:Rx%re.49680$wr.38116@clgrps12... "John Smith" wrote in message news ![]() ... no need, I have seen the results of such devices in practical operation... I do a class at the jr. college here, have 3 sons in the computer field, my garage is a clubhouse/wireless point/computer lab... ... lot of cs/electronics majors... they have fired up such devices before I said, "Not here!!!" Really got ****ed when it jammed my "late night talk radio" which I fall asleep to... Warmest regards, John When people try to say you are talking garbage it sparks my curiosity, and have to see for myself. I should have realized that Sa(x) almost goes on forever. Even at 100 GHz from the carrier the sidebands are about -85 dBc. Other factors will probably suppress these very high order sidebands, but still interesting to crunch numbers. Now I have an overwhelming desire to build a -4000 V pulse generator, just to see how close it comes to theory. 73, Frank |
#2
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"John Smith" wrote in message
... Frank: Lol, it is catching huh? Almost without doubt, what was tearing up my am radio was the signal being fed on the B+ rail (~1Mhz run by a "chopped" supply--and most likely leaking some signal onto the house mains--I am guilty of not making those suspicions clear)... however, their intent was to jam wireless wans/lans--from what I heard--they were/are more than successful... I know there was great experimentation here in trying to get a microwave magnetron "rock stable"--when that failed it lead to the "other" experimentation... Just in case there is something to this--be careful when and where you operate it...I think it just might surprise you... Warmest regards, John When the microwave oven is running it interferes with my 200 kHz (conducted over house wiring) intercom system (Rat Shack). I suspected that it was noise from the power supply, and not the actual magnetron. I am still inclined to believe that the selectivity of the magnetron cavities will limit the modulated spectrum, not to mention the waveguide cut-off frequency. If I get a chance I will look more carefully at the RF output on a spectrum analyzer. As for magnetron frequency stability and phase noise performance, I remember COHO/STALO MTI RADAR, and thought that the magnetron was stabilized. This is not true, as explained in http://www.alphalpha.org/radar/coho_e.html The only way I can conceive of stabilizing is by the use of a tunable magnetron and AFC system. Then there is also the possibility of injection locking. 73, Frank |
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