New version Pulse Generator (based Jim Williams Pulse Gen) - Page 1
Forum section: electronics / projects

author: max-bit
author_rank: Frequent Contributor
timestamp: October 11, 2015, 09:51:47 am
content: I designed a new version of the pulse generator, based on the design by Jim William "Pulse Gen"The main objectives were:- small size (the overall size of the casing 48x67mm (PCB 42x59mm)- low cost- easy accessibility to the elements (including the transistor 2n2369A)specification:Rise Time 250 - 300 psVp-p 8-10 Vpulse repetition - 5-15 usTo power the system, I use CR2450 batteries, current consumption of the gen does not exceed 3mA. This should provide approximately 100 hours of work.Project is easily upgrade to the version of the SMA connector.If someone is interested, I can arrange several sets (all componenst + casing for your own soldering - set of parts) or ready-soldered ready to usePCB

author: BravoV
author_rank: Super Contributor
timestamp: October 11, 2015, 09:55:34 am
content: Not sure when looking at your circuit and pcb design, does it have built in transmission line at the pcb ?Edit :Referencing other thread building similar pulse gen with transmission line built in at the pcb :->https://www.eevblog.com/forum/projects/transmission-line-avalanche-pulse-generator/

author: max-bit
author_rank: Frequent Contributor
timestamp: October 11, 2015, 10:12:38 am
content: This version does not have the transmission line, some regulation of the pulse, provides trimmer C7.Transmission line, does not allow the pulse width adjustment.

author: BFX
author_rank: Frequent Contributor
timestamp: October 11, 2015, 10:55:36 am
content: NiceOne set or only PCB for me please

author: HighVoltage
author_rank: Super Contributor
timestamp: October 11, 2015, 11:23:07 am
content: Very nice, I am interested.Let me know, when you are done.

author: awallin
author_rank: Frequent Contributor
timestamp: October 11, 2015, 11:56:16 am
content: Quote from: max-bit on October 11, 2015, 09:51:47 amCan you show screenshots of the pulse with say a 100MHz, 500MHz, and 1GHz scope? Would be very interesting.

author: tggzzz
author_rank: Super Contributor
timestamp: October 11, 2015, 12:01:56 pm
content: Quote from: max-bit on October 11, 2015, 09:51:47 am... and the results are?

author: nowlan
author_rank: Frequent Contributor
timestamp: October 11, 2015, 12:47:46 pm
content: !!!Warring!! ?

author: H.O
author_rank: Frequent Contributor
timestamp: October 11, 2015, 01:32:39 pm
content: Sincefree_electronskits don't seem to materialise I'm interested in a kit if you make them available, thanks for offer!. But please do post some screenshots of its actual performance.

author: max-bit
author_rank: Frequent Contributor
timestamp: October 11, 2015, 09:52:16 pm
content: The rise time of this generator is 250 - 300psI look forward to the delivery of PCB, and LT1073 ....So it looks like on an oscilloscope Rigol DS 2302AAnd sample measurement (TDR) cable you can see the reflection at the cable endView from 1GHz oscilloscope:

author: c4757p
author_rank: Super Contributor
timestamp: October 11, 2015, 10:28:01 pm
content: We've discussed to death why the rise time measurement is meaningless if it doesn't come flat at the top. Your readings will be off by anywhere from 0% to50%, and worse, on the optimistic side. Youneedthe transmission line.

author: max-bit
author_rank: Frequent Contributor
timestamp: October 11, 2015, 10:45:28 pm
content: That is why for a long time I think over building a fully regulated ns - ps pulse generator...Please note that this is a very simple generator. Based on one element - transistor executive ...and low costeverything depends on what we need the "pulse" generator ...However, if the pulse lasts several ns, it is no longer a pulse generator ...only a rectangular signal generator though with a fast rise time

author: c4757p
author_rank: Super Contributor
timestamp: October 11, 2015, 10:49:58 pm
content: Yes, but that is much more commonly desired than an impulse. What do you need a non-flat impulse for? Certainly not rise time measurements, unless you're looking to get silly "optimistic" numbers.

author: nbritton
author_rank: Frequent Contributor
timestamp: October 12, 2015, 06:12:52 am
content: Quote from: H.O on October 11, 2015, 01:32:39 pmDitto

author: max-bit
author_rank: Frequent Contributor
timestamp: October 12, 2015, 10:28:46 am
content: Pulse - a rectangle, I suggest you leave at this stage these agonizing.I'll see how it will work adjustable capacitor C7....Does anyone know a cheap source of the LT1073 ADJ?

author: max-bit
author_rank: Frequent Contributor
timestamp: October 12, 2015, 04:58:42 pm
content: I received a PCBLittle problem was not created layer "tNames"or description of the elements, the problem almost noneI feel sorry for only a nice logoIt's first 3D lookAnd now look execute PCB

author: georges80
author_rank: Frequent Contributor
timestamp: October 12, 2015, 07:07:28 pm
content: ... missing names/logo etc... and this is why it is a *GOOD* idea to use a gerber viewer to verify each layer of a design prior to sending the files off to the PCB fab.cheers,george.

author: BFX
author_rank: Frequent Contributor
timestamp: October 12, 2015, 08:20:36 pm
content: pm sent with my address:)please inform me about price of kit and PCBthx

author: max-bit
author_rank: Frequent Contributor
timestamp: October 13, 2015, 05:47:52 am
content: yes, haste is a bad counselorCurrently I am waiting for LT1073

author: nbritton
author_rank: Frequent Contributor
timestamp: October 13, 2015, 04:47:46 pm
content: Have you settled on pricing yet?

author: max-bit
author_rank: Frequent Contributor
timestamp: October 13, 2015, 06:47:55 pm
content: 50$ include ship cost (KIT)

author: max-bit
author_rank: Frequent Contributor
timestamp: October 17, 2015, 06:11:01 pm
content: End of work on the prototypeHere prototypeA few picturesSoon there will be available first sets. One set (KIT to perform soldering) price 50$ (include cost shipping).

author: max-bit
author_rank: Frequent Contributor
timestamp: October 18, 2015, 05:24:18 am
content: If you want a rectangle just that in place of "C7" soldered coaxial cable

author: max-bit
author_rank: Frequent Contributor
timestamp: October 21, 2015, 06:54:49 pm
content: KIts see Buy/Sell/Wanted

author: max-bit
author_rank: Frequent Contributor
timestamp: October 27, 2015, 06:54:25 pm
content: Precise measurementsused oscilloscope:LeCroy LC584AL 1 GHz 8GS/s (rise time ~330-350ps)Pulse the load 50OmPulse the load 1MOmjitter trigger pulse

author: free_electron
author_rank: Super Contributor
timestamp: October 27, 2015, 07:32:25 pm
content: you can make that pulse go faster by doing dead spider. right now you have a parasite with the ground plane being so close to output and coaxhttp://www.siliconvalleygarage.com/eevblog/cal/Calibration%20Certificate%204.pdf155ps easy.

author: BFX
author_rank: Frequent Contributor
timestamp: March 20, 2017, 05:55:51 pm
content: After around two years of using this PG a have only few suggestion's.- I was surprised using BNC connector and I think SMA would be better. (but it's work relatively fine)- and as said my friend different is only at PCB design and this longer OnTime which I'm not sure if it's improvement. (little bit design change would be big improvement)- max-bit it's really bad if you move or remove images which is used in this thread (please upload it to eevblog or repair your links)

author: tecman
author_rank: Frequent Contributor
timestamp: March 20, 2017, 08:33:10 pm
content: Does anybody have a PCB or kit to sell yet ?Paul

author: rodd
author_rank: Regular Contributor
timestamp: March 21, 2017, 03:29:06 pm
content: Quote from: tecman on March 20, 2017, 08:33:10 pmIf affirmative, I am also interested.Thanks.Enviado do meu iPhone usando Tapatalk

author: free_electron
author_rank: Super Contributor
timestamp: March 21, 2017, 03:30:24 pm
content: i just got a batch of boards in for my pulse generator design ( about 100 pieces ).5$ + shipping for a pcb. ( in the us that is a regular envelope with stamp)i need to see if i can scavenge some more of the gold plated transistors. will post an update over the weekend.

author: all_repair
author_rank: Frequent Contributor
timestamp: March 21, 2017, 04:33:16 pm
content: Mark me for 2 sets, with or without parts, out of US. If mailing out of US a hassle, I have a forwarding address in US also. THANKS.

author: macboy
author_rank: Super Contributor
timestamp: March 21, 2017, 04:38:29 pm
content: Quote from: free_electron on March 21, 2017, 03:30:24 pmDoes your design use a capacitor or a transmission line (coax or stripline) for charge storage?In other words, does the generated pulse have an upper plateau (i.e. a step), or is it just a hump (i.e. an impulse)?

author: metrologist
author_rank: Super Contributor
timestamp: March 21, 2017, 04:48:53 pm
content: Quote from: macboy on March 21, 2017, 04:38:29 pmMe two, I'm interested in the details. Is there a circuit?

author: free_electron
author_rank: Super Contributor
timestamp: March 21, 2017, 04:56:58 pm
content: yes, my design has a strip line and has a plateau.about 80 of these have been built and they have been measured on one of the most performant oscilloscopes in the world :DSA-X 93204A: 32GHz analog bandwidth. 80 Gigasamples per second on 4 channels ,2.1 Billion points of memory, PER channel.project :http://siliconvalleygarage.com/projects/picosecond-pulser.html

author: macboy
author_rank: Super Contributor
timestamp: March 21, 2017, 05:14:08 pm
content: Quote from: free_electron on March 21, 2017, 04:56:58 pmVery nice. Just long enough pulse for risetime measurements, not so long as to stress/kill the Q1 prematurely.I see you use the good old 2N2369. I have a few of these NOS, original Motorola, made decades ago (still in factory packaging). I've been keeping them for this type of project. Now that I have a 2 GHz scope, I'm motivated. Definitely mark me down for two PCBs. I'd also be interested in full or partial kits. Letter mail to Canada shouldn't be an issue, I've received quite a few different non-document things via letter mail from the USA.

author: H.O
author_rank: Frequent Contributor
timestamp: March 21, 2017, 05:25:42 pm
content: Yes I'm (still) interested in a PCB (with or witout any parts) if you can ship to Europe (at my cost of course).

author: Unknown
author_rank: Unknown
timestamp: March 21, 2017, 06:33:32 pm
content: free_electron, please count me in for a pcb.

author: Gixy
author_rank: Regular Contributor
timestamp: March 21, 2017, 06:40:31 pm
content: Hi Vincent,Welcome back with your splendid pulse generator. One PCB for me too, preferably with the gold plated transistor.Thx,Denis

author: HighVoltage
author_rank: Super Contributor
timestamp: March 21, 2017, 06:47:51 pm
content: I would like to take one of your PCB's as well.Thanks

author: free_electron
author_rank: Super Contributor
timestamp: March 21, 2017, 06:48:31 pm
content: right . let me dig in my garage to see if i still have a pile of those transistors ( i think i do ) gold plated legs. NOS SGS or Motorola's.i will create a separate topic where you can place the request. I need ot check for shipping internationally what they charge these days. i would do board + transistor. the rest you need to take care of yourself ( i did complete kits previously but that takes a lot of time. if there is enough demand we could do that again. all parts are available at digikey.let me organise my thoughts and i will set it up.

author: tecman
author_rank: Frequent Contributor
timestamp: March 21, 2017, 07:14:14 pm
content: I am interested in one as well, and a kit with parts would be great.paul

author: kaz911
author_rank: Super Contributor
timestamp: March 21, 2017, 08:58:01 pm
content: And me too pleasewith transistor if at all possible (US/Fl shipping address)

author: JPortici
author_rank: Super Contributor
timestamp: March 21, 2017, 09:38:25 pm
content: So there still are pcbs. One or two for me too! advice on parts?(There *shouldn't* be anything that esoteric, right?)

author: SvanGool
author_rank: Regular Contributor
timestamp: March 21, 2017, 09:39:46 pm
content: I would like one of your PCBs too

author: james_s
author_rank: Super Contributor
timestamp: March 21, 2017, 10:18:24 pm
content: I've gotten interested in building a pulse generator for some TDR experiments. There's a nice looking TDR adapter design on Mr. Carlson's lab but he didn't go into much detail on component choices. I know the transistor needs to be carefully selected but how critical is the capacitor? Can I expect reasonable performance using any old ceramic chip cap I find in the right value or does it need to be something specific? Extremely fast risetime pulses are new territory for me.

author: Rycroft
author_rank: Contributor
timestamp: March 21, 2017, 10:50:35 pm
content: I'll take a PCB and transistor if you will ship to Australia.

author: amspire
author_rank: Super Contributor
timestamp: March 21, 2017, 11:32:45 pm
content: I will take one. Looks like TO18 packaged 2N2369's are available in Australia at a good price - don't know if it is the gold plated leg one, but I will get some and see.

author: eliocor
author_rank: Unknown
timestamp: March 21, 2017, 11:41:34 pm
content: I would be interested in 2 pieces...

author: djnz
author_rank: Regular Contributor
timestamp: March 22, 2017, 02:58:43 am
content: I'd be interested as well. Thank you for doing this.

author: amspire
author_rank: Super Contributor
timestamp: March 22, 2017, 03:33:48 am
content: If anyone in Australia is interested, particularly if they are in Melbourne, Rockby have 13 x 2N2369 transistors in stock for under $1.40 each. If you have to use mail order, that is an extra $10.https://www.rockby.com.au/SearchresSql_12.cfm?Searchkey=2n2369I haven't been following the pulse generator discussion well enough to know if there are good and bad versions of this transistor.

author: mtdoc
author_rank: Super Contributor
timestamp: March 22, 2017, 04:14:56 am
content: Glad to see you come back to this V. Count me in for one. I'll keep a look out for the new thread.

author: MatteoX
author_rank: Regular Contributor
timestamp: March 22, 2017, 04:28:30 am
content: I would also like one board (with transistor if possible).

author: mbless
author_rank: Regular Contributor
timestamp: March 22, 2017, 01:11:12 pm
content: I'll take 1 with the transistor! I'll post in the new thread when it is started.

author: Bud
author_rank: Super Contributor
timestamp: March 22, 2017, 01:17:43 pm
content: If you want more takers, count me in (Canada, we pay CAD $1.2 postage to US for regular mail envelope)

author: tecman
author_rank: Frequent Contributor
timestamp: March 22, 2017, 06:42:12 pm
content: free_electronlet us know how/where to buy these from youpaul

author: K5HJ
author_rank: Regular Contributor
timestamp: March 23, 2017, 03:43:32 am
content: Me too. I would like a PCB and transistor please.Randy

author: Conrad Hoffman
author_rank: Super Contributor
timestamp: March 24, 2017, 05:07:26 pm
content: I'd like a board, don't need a transistor.

author: vindoline
author_rank: Unknown
timestamp: March 24, 2017, 05:11:15 pm
content: I would like to get in line as well for a board (and transistor if available). Thanks.

author: kkessler
author_rank: Regular Contributor
timestamp: March 24, 2017, 06:52:14 pm
content: I'll put my name in for a board only. Thanks

author: barry14
author_rank: Regular Contributor
timestamp: March 24, 2017, 09:43:43 pm
content: Please put me in for a board and transistor. Thanks.

author: farzadb82
author_rank: Contributor
timestamp: March 24, 2017, 09:48:27 pm
content: Please count me in for a board and transistor too.

author: rx8pilot
author_rank: Super Contributor
timestamp: March 24, 2017, 09:52:35 pm
content: REALLY hoping to get anything you have.... PCB, transistors, etc. 2 pieces should be good if available.I live in California, should be easy.Sent from my horrible mobile....

author: fpliuzzi
author_rank: Regular Contributor
timestamp: March 24, 2017, 11:21:10 pm
content: Please count me in for a board and transistor also. Thanks for making these available again.

author: rx8pilot
author_rank: Super Contributor
timestamp: March 26, 2017, 02:35:33 am
content: If it helps, I will offer shipping assistance fron my shop in Los Angeles. Save some time on your end.Sent from my horrible mobile....

author: electrolust
author_rank: Unknown
timestamp: March 31, 2017, 09:20:41 pm
content: WOW.Talk about timing. (<- haha)I was just drooling over this design (Vince/svgarage) but it looked long dead / abandoned. To see that it was just revived, just now, when I was looking, wow.PLEASE put me down for 2. Hell I can easily get rid of 10 of them to others if you find you don't have enough takers or if you would rather batch up sales.Also I'm in south bay and can help with or just take over the distribution if it helps you at all. Maybe even do pre-assembled kits if folks want -- although since from the looks of it this comes with a "cal cert" I suppose they are assembled.

author: Rycroft
author_rank: Contributor
timestamp: April 01, 2017, 05:39:14 am
content: A PCB and transistor for me, too, please.

author: luisprata
author_rank: Regular Contributor
timestamp: April 01, 2017, 08:31:42 am
content: Hi,Anybody knows if I can use the board bellow confiured as 60MHz clock generator with 200ps rise time as a pulse generator?https://www.digikey.com/products/en?keywords=LMK61PDEVMThank you.Luis.Modify message

author: jhenderson0107
author_rank: Regular Contributor
timestamp: April 01, 2017, 03:30:27 pm
content: A PCB and transistor for me, too, please.

author: free_electron
author_rank: Super Contributor
timestamp: April 03, 2017, 08:21:03 pm
content: If all goes well i will secure a batch of goldplated transistors this week.

author: HighVoltage
author_rank: Super Contributor
timestamp: April 03, 2017, 09:17:16 pm
content: Quote from: free_electron on April 03, 2017, 08:21:03 pmNice, Thank you!If you have plenty available, I take two PCB's and two transistors, otherwise I am happy with one.

author: Unknown
author_rank: Unknown
timestamp: April 03, 2017, 11:32:16 pm
content: Quote from: free_electron on April 03, 2017, 08:21:03 pmI already posted my interest in the pcb and please put me down for a transistor also. Thanks.

author: jklasdf
author_rank: Regular Contributor
timestamp: April 03, 2017, 11:37:25 pm
content: Count me in for a board and transistor also.

author: Octane
author_rank: Regular Contributor
timestamp: April 04, 2017, 12:12:15 am
content: I also would like to get 2 pcbs plus transistors if you still have parts left after this long list of buyers.I'm in the US.Thanks!

author: ruairi
author_rank: Frequent Contributor
timestamp: April 04, 2017, 12:49:55 am
content: I'll join the list for whatever it takes to make one unit.

author: lukier
author_rank: Unknown
timestamp: April 04, 2017, 10:07:59 am
content: Count me in for one board + transistor kit.

author: sanman
author_rank: Contributor
timestamp: April 04, 2017, 02:33:20 pm
content: Please count me in for 1 board + transistor ! Thanks!

author: xaled
author_rank: Newbie
timestamp: April 17, 2017, 06:27:47 am
content: Count me in for one board + transistor kit.

author: free_electron
author_rank: Super Contributor
timestamp: April 17, 2017, 02:36:56 pm
content: i have acquired a bunch of original motorola NOS ( new old stock ) A versions of the transistors.I am willing to do another action ( board + parts ) if there is enough interest. i will do a price calculation this week.That way you don't individually have to go hunt for 'difficult components'.i would sip the case and the battery holder all the 'thin' items easily fit in a regular envelope.

author: PA0PBZ
author_rank: Super Contributor
timestamp: April 17, 2017, 02:39:56 pm
content: Vincent, you said you would open another thread but everyone is just posting here so I'd like to show my interest in 1 or 2 also.

author: metrologist
author_rank: Super Contributor
timestamp: April 17, 2017, 03:29:30 pm
content: Most definitely a kit would be welcome.

author: mmagin
author_rank: Frequent Contributor
timestamp: April 17, 2017, 04:30:50 pm
content: Quote from: PA0PBZ on April 17, 2017, 02:39:56 pmMe too, I was waiting for that other thread -- I am interested in 1 PC board + transistors.Somewhat related, I've thought about playing with the FMMT417. After searching for avalanche transistors in Digikey, I went on a web search for that part and found this -- fascinating, but way more amplitude than I can imagine ever needing:https://www.researchgate.net/publication/251842621_Compact_Subnanosecond_Pulse_Generator_using_Avalanche_Transistors

author: HighVoltage
author_rank: Super Contributor
timestamp: April 17, 2017, 05:36:49 pm
content: This is just a repeat of my earlier interest shown.I would take 2 or 3 sets if possible

author: Dubbie
author_rank: Unknown
timestamp: April 17, 2017, 06:02:55 pm
content: I would like one too please

author: electrolust
author_rank: Unknown
timestamp: April 17, 2017, 06:10:43 pm
content: Quote from: mmagin on April 17, 2017, 04:30:50 pmBesides the pulse generator, there is a nice description of their custom designed 1400:1 probe in there. Like, mounting SMT 1206 resistors on their side to limit parasitic capacitance. I guess they had a reason to use 1206 vs 01005 or printed resistors, perhaps cost or DfM but they don't mention it.

author: electrolust
author_rank: Unknown
timestamp: April 17, 2017, 06:12:20 pm
content: Vincent, clearly there's no financial incentive here, any objection to publishing the files for your PCB design? It would be highly educational. (I'd still want to buy 2 kits from you either way.)

author: metrologist
author_rank: Super Contributor
timestamp: May 22, 2017, 03:11:30 pm
content: I had forgotten about this. Has there been any updates or another thread?

author: free_electron
author_rank: Super Contributor
timestamp: May 22, 2017, 03:33:05 pm
content: i will do a price calculation for kits today. i have a good idea now how many people want a board + transistorsi will compile a list of people who have posted so far.i have plenty of transistors available.two options are availablepcb + 2 transistorspcb + 2 transistors + all other parts. including the case ( but not milled )international shipping can get pricey .. that i have not found a good solution for yet. USPS used to have a flat rate that was pretty cheap but has now skyrocketed to 21$ ...i will post an update later today and will activate a website where you can place the order (paypal only)

author: timb
author_rank: Super Contributor
timestamp: May 22, 2017, 03:40:35 pm
content: Count me in for one too!

author: metrologist
author_rank: Super Contributor
timestamp: May 22, 2017, 06:58:36 pm
content: Quote from: free_electron on May 22, 2017, 03:33:05 pmWhat is required for milling? I have a small machine shop with a factory Bridgeport CNC.

author: lukier
author_rank: Unknown
timestamp: May 22, 2017, 10:06:56 pm
content: Count me in for PCB + 2 transistors.

author: orin
author_rank: Frequent Contributor
timestamp: May 22, 2017, 10:09:50 pm
content: Count me in for one "pcb + 2 transistors + all other parts. including the case ( but not milled )".

author: gdewitte
author_rank: Unknown
timestamp: May 23, 2017, 01:37:55 am
content: 1 PCB = transistors and other parts for me, please.

author: linux-works
author_rank: Super Contributor
timestamp: May 23, 2017, 01:39:53 am
content: pcb and transistorsthx

author: Dubbie
author_rank: Unknown
timestamp: May 23, 2017, 02:14:19 am
content: pcb + 2 transistors + all other parts. including the case ( but not milled )for me thanks.

author: JPortici
author_rank: Super Contributor
timestamp: May 23, 2017, 06:05:34 am
content: i'll wait to see the prices but probably complete kit

author: nano
author_rank: Contributor
timestamp: May 23, 2017, 06:29:53 am
content: Also intereseted in a complete kitThank You!

author: danadak
author_rank: Super Contributor
timestamp: May 23, 2017, 10:25:47 am
content: I am interested in complete kit as well.Regards, Dana.

author: HighVoltage
author_rank: Super Contributor
timestamp: May 23, 2017, 10:48:07 am
content: As I have said before, still count me in for 2 to 3 sets with all parts.Thank you for your great effort.

author: fpliuzzi
author_rank: Regular Contributor
timestamp: May 23, 2017, 01:42:16 pm
content: Please count me in for a complete kit with the unmilled case. Thanks again.

author: jhenderson0107
author_rank: Regular Contributor
timestamp: May 28, 2017, 12:31:46 pm
content: Full kit for me, please

author: whitevamp
author_rank: Regular Contributor
timestamp: May 28, 2017, 01:04:18 pm
content: i'll wait to see the prices but probably pcb + 2 transistors + all other parts. including the case ( but not milled )

author: Selectech
author_rank: Regular Contributor
timestamp: May 28, 2017, 01:29:12 pm
content: Count me in, 2 Sets, full kit.

author: electronic_eel
author_rank: Regular Contributor
timestamp: June 04, 2017, 09:15:09 am
content: I'm interested in just transistors + pcb.Making full kits is a whole lot of work. I've organized a group buy before, so I know what I'm talking about. Don't want to put that burden on you.

author: MagicSmoker
author_rank: Super Contributor
timestamp: June 04, 2017, 12:57:10 pm
content: I suspect free_electron will find that it takes just as much time to put a kit together as it does to just make the damn thing...

author: MK
author_rank: Regular Contributor
timestamp: June 04, 2017, 03:29:02 pm
content: This thread is so old the original schematics are no longer available from the posts near the beginning, so I could only be provisionally interested in PCB plus transistors until the schematic and PCB layout can be reattached to this thread.Thanks

author: PA0PBZ
author_rank: Super Contributor
timestamp: June 04, 2017, 07:14:45 pm
content: Quote from: MK on June 04, 2017, 03:29:02 pmhttp://www.siliconvalleygarage.com/projects/picosecond-pulser.html

author: mtdoc
author_rank: Super Contributor
timestamp: June 04, 2017, 08:40:42 pm
content: Looking forward to having one of these. It appears Elon must have Vincent very busy though....

author: DLJ
author_rank: Contributor
timestamp: June 14, 2017, 09:41:41 pm
content: I am interested in PCB, transistor, or a full kit.I was hoping it could be a fathers day gift. But I also have a birthday coming up

author: JPortici
author_rank: Super Contributor
timestamp: June 15, 2017, 07:29:26 pm
content: is there any update?