[time-nuts] fast edge, rise time.

Bill Reed breed at otelco.net
Mon Jan 13 14:22:19 EST 2014


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 (reedbn at 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.
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