[time-nuts] fast edge, rise time.

Bill Reed breed at otelco.net
Thu Jan 16 17:09:37 UTC 2014


Paul
It weighs 30 lbs. Pictures are on face book or I can email with an address.
Bill

-----Original Message----- 
From: paul swed
Sent: Wednesday, January 15, 2014 12:20 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] fast edge, rise time.

Bill
Interesting and curious what does it weigh? I would guess since its NIST a
lot.
Regards
Paul
WB8TSL


On Wed, Jan 15, 2014 at 1:15 PM, Bill Reed <breed at otelco.net> wrote:

> Thanks Mark
>
> I must have serial number 2 of that series of IPG's. The one in the
> article is SN-3-75-1 and mine is SN-3-75-2.
> It was probably fabricated in March 75.
> I plan on visiting Redstone library to look up references 8 and 9.
>
> Bill
>
> -----Original Message----- From: Mark Kahrs
> Sent: Tuesday, January 14, 2014 12:02 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] fast edge, rise time.
>
> 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 <breed at 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 (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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