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 >>> time-nuts@febo.com >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> >>> >>> >>> >>> >> _______________________________________________ >> time-nuts mailing list >> time-nuts@febo.com >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> >> >> > > > _______________________________________________ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts