You might be interested to know this was discussed in a paper by Jim Andrews (founder of Picosecond Pulse Laboratories):
http://www.nist.gov/calibrations/upload/im-25-4.pdf >From the age of the paper, I'd say this generator is probably more than 40 years young. On Mon, Jan 13, 2014 at 2:22 PM, Bill Reed <br...@otelco.net> wrote: > Hi, > > Since there is no interest in my pulse generator maybe one of you knows > someone at NBS who can provide a schematic of the generator. > It has " NBS Impulse Generator SN 3-75-2 " engraved on the front panel > and is ~ 10 x 16 x 17. > > Thanks, > Bill Reed > > -----Original Message----- From: Bill Reed > Sent: Tuesday, January 07, 2014 7:53 PM > > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] fast edge, rise time. > > Hi, > > Since you guys are interested in fast pule generators, I have one you may > be > interested in. > I got it in govt. auction about 25 years ago for ~ $ 50.00. I will sell it > to anyone for $ 50.00 plus shipping. > I prefer to sell to someone who will restore and use it rather than parting > it. It has more than $ 50.00 parts in it. > There are a 30 turn 6.5 inch diameter hard line, wide band hybrid coupler, > diode assembly and several adapters and attenuators. > I believe the hard line discharges into a step diode. The power supply > includes 200 V plus other voltages. > If I remember correctly ( I have no high speed scope now ) the pulse is 2 > nanoseconds wide with a 280 picosecond rise time and and 2.5 Vpp. > I checked with a 200 MHz digital scope and can see a pulse that verifies my > scopes bandwidth. The rate generator works but has problems. > See facebook (ree...@otelco.net) for pictures under Impulse. > > Bill Reed 256 586-3446 > > -----Original Message----- From: ct1dmk > Sent: Sunday, December 29, 2013 7:36 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] fast edge, rise time. > > Thank you all for your comments on this subject. > Happy new year. > > Luis Cupido. > ct1dmk. > _______________________________________________ > 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.