Hi Didiere: There's also an app note at Linear Technology for making pulses so fast they are used to calibrate sampling scopes.
Some years ago I made a very simple circuit that pulses a LED with many amps (very short time) based on a transistor going into avalanche. Have Fun, Brooke Clarke w/Java http://www.PRC68.com w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml http://www.precisionclock.com Didier Juges wrote: >Bruce, > >I finally found the time to google for avalanche pulse generator and >found an App note from Zetex on the subject. >I was not familiar with this technology, but it seems interesting. >Amazing that you can get 50A pulses with sub-ns rise time out of a >device in an SOT-23 (or TO-92) package! > >I have uploaded the app note to >http://www.ko4bb.com/Test_Equipment/AvalanchePulser > >Now, I just need a scope fast enough to take advantage of such a short >rise time. Back to eBay again :-) > >Didier > >Dr Bruce Griffiths wrote: > > >>Didier >> >>You can always build your own 100A avalanche transistor pulser using >>several Zetex FMMT413s. >> >>Bruce >> >>Brooke Clarke wrote: >> >> >> >>>Hi Didier: >>> >>>Yes they are on eBay. The tunnel diode models have a narrower pulse >>>than the later models that use something more rugged. Probably for all >>>practical purposes one of the newer ones would work well and last >>>better. I think the military bought boat loads of these and I've heard >>>from a number of people that use them and like them a lot. >>> >>>Have Fun, >>> >>>Brooke Clarke >>> >>>w/Java http://www.PRC68.com >>>w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml >>>http://www.precisionclock.com >>> >>> >>> >>>Didier Juges wrote: >>> >>> >>> >>> >>> >>>>Going over the spec for the 1502, it seems like a nice instrument. I am >>>>worried about the fragility of the tunnel diode though. When my neighbor >>>>AD4TK fires up his amplifier, I have measured up to 1W of his signal >>>>going down my feedline (on the 80m slopper antenna)... >>>> >>>>Are these things on eBay? >>>> >>>>Didier KO4BB >>>> >>>>Brooke Clarke wrote: >>>> >>>> >>>> >>>> >>>> >>>> >>>>>Hi Didier: >>>>> >>>>>The Tek 1502 is great for doing this, especially if you have the >>>>>optional strip chart recorder. It's what it was made to do. >>>>>http://www.pacificsites.com/~brooke/Tek1502.shtml >>>>> >>>>>Have Fun, >>>>> >>>>>Brooke Clarke >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>_______________________________________________ >>>>time-nuts mailing list >>>>[email protected] >>>>https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>_______________________________________________ >>>time-nuts mailing list >>>[email protected] >>>https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> >>> >>> >>> >>> >>_______________________________________________ >>time-nuts mailing list >>[email protected] >>https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> >> >> >> > >_______________________________________________ >time-nuts mailing list >[email protected] >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > > _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
