Author Topic: EEVblog #306 - Jim Williams Pulse Generator  (Read 242615 times)

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Online BravoV

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #250 on: February 26, 2013, 02:51:07 am »
Stop teasing us, post one of the captured trace please.
« Last Edit: February 26, 2013, 03:09:09 am by BravoV »
 

Offline Teneyes

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #251 on: February 26, 2013, 05:02:47 am »
@BravoV
  "all good things come to those who wait"
IiIiIiIiIi  --  curiosity killed the cat but, satisfaction brought it back
 

Online BravoV

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #252 on: February 26, 2013, 05:19:58 am »
@BravoV
  "all good things come to those who wait"

A ha.... ok..ok.. this one I have to agree.  ;D

Online free_electron

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #253 on: February 26, 2013, 03:39:46 pm »
I'm busy assembling packages :). First units will go out the door thursday. I am milling the cases right now.
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Online BravoV

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #254 on: February 26, 2013, 04:35:30 pm »
Since you've played with "unnaturally" huge amount  ;D of 2N2369A transistors lately when preparing the cal kit, just curious, are there any huge variations on the tR between them ? Also the voltage where it starts to avalanche, did you just set it at fixed voltage at all boards, or you tweaked the voltage each of them ?

If there is a Guinness book of record on tweaking amount of 2N2369A for avalanching purpose, I'm guessing you must be the winner.  :-DD  ....j/k

Thanks !  :-+

Offline firewalker

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #255 on: February 26, 2013, 04:39:09 pm »
I'm busy assembling packages :). First units will go out the door thursday. I am milling the cases right now.

If you sell enough of them you could buy one of those Agilent oscilloscope and test every one individually and send a certificate in the packet!  :P :P :P

Alexander.
Become a realist, stay a dreamer.

 

Online free_electron

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #256 on: February 26, 2013, 09:46:05 pm »
i will publish the numerical data of every unit i measured so the math-freaks can 'massage' it a bit.
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Offline jpb

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #257 on: February 28, 2013, 03:33:26 pm »
free_electron,

have you any spare boards for late-comers or any plans for a second batch? (I've also clogged up your in-box with a couple of pms - sorry to be annoying!)
 

Online free_electron

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #258 on: March 04, 2013, 03:12:04 am »
Here's an update of stuff that is leaving tomorrow.
if your name has serial numbers or 'shipped' behind your line : those leave monday march 4



                  Kit   : CAL  :  PCB: PM : PAID : SHIPPED
alfbaz                  :  2x  :  3x : pm : PAID :
andyturk                :  1x  :     : pm : PAID : serial 4
Barryg41                :  1x  :     : PM : PAID : serial 5
biot                    :  1x  :     : PM : PAID :
BravoV             1x   :  1x  :     : PM : PAID :     with BFG
blackknife         1x   :      :     : pm :      :
casinada                :  1x  :     : pm : PAID : serial 18
circuitous              :  1x  :     : pm : PAID : serial 17
Christe4nM              :  1x  :  1x : pm : PAID :
condor                  :  1x  :     : pm : PAID : serial 7
cyr                     :  1x  :     : pm : PAID :
echo88             1x   :  1x  :     : pm : PAID :
enz                     :  1x  :     : pm : PAID :
EV                      :  2x  :     : pm : PAID :
fmaimon            1x   :  1x  :     : pm : PAID :       bfg
g7psk                   :  1x  :     : PM : PAID :
gibbled            1x   :      :  1x : pm : PAID :
grenert                 :  1x  :     : pm : PAID : serial 12
komet                   :  1X  :     : PM : PAID :
marshallh               :  1x  :     : pm : PAID : serial 15
nadona                  :  1x  :     : pm : PAID : serial 53
Neganur                 :  2x  :     : pm : PAID :
noize                   :  1x  :     : PM : paid :
olegjay                 :  2x  :  2x : pm : PAID : serial 63 / 16
olepr01@gmail.com  1x   :      :     : pm : PAID :
plesa              1x   :      :  1x : pm : PAID :
robrenz                 :  1x  :     : pm : PAID : serial 9
sdscotto                :  3x  :     : pm : PAID :
Spelunker          1x   :      :     : pm :      :
sCuba              1x   :  1x  :     : PM : PAID :
teneyes            1x   :  1x  :     : pm : PAID : serial 14
Tymm                    :  2x  : 1x  : pm : PAID : serial 46 / 36
Wsalden            2x   :      :     : pm : PAID :

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Offline condor

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #259 on: March 07, 2013, 08:23:02 pm »
Hi
Got my package (7) today, Thanks.
But where is the assembly drawing or assembly instructions?
« Last Edit: March 07, 2013, 08:57:44 pm by condor »
 

Offline marshallh

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #260 on: March 07, 2013, 10:22:02 pm »
Got the kit. Really nice job.
I gave my best shot at assembly but I"m too chicken to put in the battery until I'm 100% sure

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Offline HackedFridgeMagnet

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #261 on: March 07, 2013, 10:25:20 pm »
AN47 on page 93.

In about the first 10 pages of this thread. there is some discussion.

the things to watch are the bjt pinout and the mounting of the emitter with the 50ohm resistor.

there are some extra small caps and spare positions for them, just put in one to start.

 

Online BravoV

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #262 on: March 08, 2013, 04:09:11 am »
Got the kit. Really nice job.
I gave my best shot at assembly but I"m too chicken to put in the battery until I'm 100% sure

I thought CAL-ed version came with the avalanche transistor soldered at the board ? or did you solder it your self ?

Offline condor

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #263 on: March 08, 2013, 04:21:04 am »
The transistor is soldered to the board. So I am lazy, I just didn't want to reverse-engineer the board to see where the rest of components go.
 

Online BravoV

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #264 on: March 08, 2013, 04:24:45 am »
The transistor is soldered to the board. So I am lazy, I just didn't want to reverse-engineer the board to see where the rest of components go.

Oh .. ok, so all components are already soldered and ready to use when you received it ?

Offline casinada

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #265 on: March 08, 2013, 06:09:48 am »
Thank you Vincent, I received the package. Now I have to put it together :)
 

Offline robrenz

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #266 on: March 08, 2013, 12:20:42 pm »
Got mine yesterday ;D  9 pico seconds... :scared: Wow Vincent, nice job  :-+  Thanks again.

Offline condor

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #267 on: March 08, 2013, 01:46:16 pm »
BravoV:
Only the transistor is soldered in. Everything else comes loose in poly bags. I was just looking for assembly instructions or a parts list with reference designators.
 

Offline EV

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #268 on: March 08, 2013, 02:09:11 pm »
How is it calibrated, if it is not assemled?
 

Online AlfBaz

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #269 on: March 08, 2013, 02:14:54 pm »
...CAL means a KIT that is semi-built and has a been measured on a high performance scope. A scope plot with rise time will be provided....
 

Offline condor

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #270 on: March 08, 2013, 02:45:49 pm »
As I said, only the transistor, R6, the 50ohm emitter resistor, and C2 are soldered to the board. I did not receive a rise-time plot or any documentation at all..
 

Offline casinada

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #271 on: March 09, 2013, 12:05:16 am »
Relevant information about the JW Pulse Generator Rev 2 (Vincent's PCB design)
As soon as I assemble the pulse Generator I will create a list of materials unless somebody else beats me to it.
 

Offline condor

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #272 on: March 09, 2013, 02:14:22 am »
Thanks a lot Casinada, just what I was hoping for!
 

Online BravoV

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #273 on: March 09, 2013, 03:28:49 am »
Got mine yesterday ;D  9 pico seconds... :scared: Wow Vincent, nice job  :-+  Thanks again.
Wow, have you receive the plot from Vincent ?

casinada & condor, thanks !  :-+

Edit :
Btw, I assumed Vincent applied the same avalanche voltage externally to all CAL kits ?
« Last Edit: March 09, 2013, 03:30:48 am by BravoV »
 

Offline robrenz

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Re: EEVblog #306 - Jim Williams Pulse Generator
« Reply #274 on: March 09, 2013, 03:39:53 am »
Wow, have you receive the plot from Vincent ?

Not yet but I am not complaining.


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