[time-nuts] Fast risetime pulse generator

[jimlux]

On 4/13/16 7:50 PM, bownes wrote:
>
> Maybe a krytron? If you are able to get one anyway. ;)

that was my first thought.. or some form of triggered sparkgap
Went and looked up the data sheet for a KN6

Their rise time isn't that fast, what sets them apart from other high 
current switching devices is that they are low jitter, while switching 
high currents.  Driving them is a pain (they need moderate high voltage, 
etc.).  Switching hundreds of amps with tens of ns jitter is useful in 
some applications, but in time nuts terms, not so wonderful.




>
>> On Apr 13, 2016, at 18:32, David <davidwhess at gmail.com> wrote:
>>
>>> On Wed, 13 Apr 2016 00:03:03 -0500, you wrote:
>>>
>>> ...
>>>
>>> If you are building up something, you probably want a SRD (step
>>> recovery diode) or tunnel diode. But both may be hard to find and
>>> expensive these days.
>>
>> Step recovery diodes are very similar in construction to varactor
>> diodes so the later can be used in step recovery applications with
>> qualification.
>>
>> I have also seen the 1N4148 used as a step recovery diode when driven
>> by an avalanche pulser but I do not know if it was qualified.
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