Electronics > Projects, Designs, and Technical Stuff

Jim Williams avalanche pulse generator build--modern choice for L1

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bd139:
First one of them I built I used 0.47uF and it worked. I used film caps.

pgo:
There are a few design on the web - search will give you several.

For reference here is the one I did a while ago.

https://github.com/podonoghue/Jim_Williams_Pulse_Generator

You can check the BOM for part numbers from Element-14

0culus:
OK, so I think I have everything correct...but it's giving me ~8-900 mV instead of of the nominal 90 V.

I noted that the SET and A0 pins on the LT1073 are unused. I tied those to ground but it didn't make much of a difference. I managed to get some crappy Chinesium radial inductors and got a 200 uH and a 100 uH one out of the box after testing a lot of them (they weren't marked at all, even to show what value should be in what compartment  |O )

0culus:
I figured it out...I did a rookie mistake and didn't notice that the datasheet for the LT1073 specifies a maximum soldering temp of 300 C...I had my station set at 370.  :palm: So I cooked that one good. Fortunately I have more than one on hand. With the 200 uH inductor, it's producing about 96 V output now.  :-+

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