Author Topic: EEVblog #306 - Jim Williams Pulse Generator (Read 295400 times)

kumar · « **Reply #525 on:** June 12, 2014, 10:58:39 am »

Dear Free-electron'

I am interested in buying this generator. Can you please let me know the availablity and price?

HighVoltage · « **Reply #526 on:** June 21, 2014, 12:09:01 pm »

Quote from: free_electron on May 20, 2014, 02:54:51 pm

A) Board + 2 NOS transistors from the same batch.
B) Full kit including case

I would also like to get a board and transistors only, to keep your effort to a minimum.
But if you would make the full kit available, I would buy it too.
Thanks for your great support.

arvidj · « **Reply #527 on:** June 23, 2014, 01:47:24 am »

+1 on a complete kit, +.5 on the board, transistors and a recommended parts list. We can convert the parts list to a digikey and\or mouser list and share it for those in the US.

electronic_eel · « **Reply #528 on:** September 12, 2014, 09:53:14 am »

Any progress with the pulser board or kit?

I'm fine with just a pcb, transistor and a Digikey/Mouser parts list. But I'd also buy a kit if international shipping isn't too expensive.

free_electron · « **Reply #529 on:** September 12, 2014, 02:11:12 pm »

Time for an update. I have received the boards (i was on vacation for the last 3 weeks.)
So i will do a pricecalc over the weekend for the kits and post details

linux-works · « **Reply #530 on:** September 12, 2014, 03:36:59 pm »

good news; thanks.

I'm still interested in one.

idpromnut · « **Reply #531 on:** September 12, 2014, 08:17:32 pm »

Quote from: free_electron on September 12, 2014, 02:11:12 pm

Time for an update. I have received the boards (i was on vacation for the last 3 weeks.)
So i will do a pricecalc over the weekend for the kits and post details

Thank you for the update!

van-c · « **Reply #532 on:** September 12, 2014, 08:56:05 pm »

Yes, free_electron, thanks for the update. I'm still interested in the kit full or partial.

--Van

johnh · « **Reply #533 on:** September 13, 2014, 02:17:24 am »

+1 for a kit

GeorgeOfTheJungle · « **Reply #534 on:** September 17, 2014, 09:18:22 am »

I'd want one too, please. Did you finally put "Jim Williams" anywhere on it?

Thank you!

LADmachining · « **Reply #535 on:** September 17, 2014, 03:30:24 pm »

Registering interest in a kit - will keep a close eye on this thread for updates.

HighVoltage · « **Reply #536 on:** September 20, 2014, 08:54:31 am »

Hello free_electron,

I am definitely still in to buy at least one kits from you, if possible, I would like to get 2 kits.
Thanks for the update.

steverino · « **Reply #537 on:** September 21, 2014, 04:06:02 pm »

I'd be interested in a kit also...

MauriceS · « **Reply #538 on:** October 02, 2014, 04:21:26 am »

+1 for kit

VintageTekFan · « **Reply #539 on:** October 07, 2014, 01:28:34 pm »

STILL interested in 1-2 kits.

wreeve · « **Reply #540 on:** October 13, 2014, 10:51:43 am »

Hi, this looks ideal for "calibrating" a new attenuator in an old infinium 'scope I've acquired. Datasheets suggest a rise time of <175ps will work! Has anyone in the UK got a Jim Williams board I could borrow for a day please! Bottle of wine and all postage costs covered!

Electro Fan · « **Reply #541 on:** October 18, 2014, 04:18:25 am »

interested in a kit with a case (or maybe an assembled unit?)
- any idea on price and availability?
Thx

David Hess · « **Reply #542 on:** October 18, 2014, 04:45:27 am »

Quote from: wreeve on October 13, 2014, 10:51:43 am

Hi, this looks ideal for "calibrating" a new attenuator in an old infinium 'scope I've acquired. Datasheets suggest a rise time of <175ps will work! Has anyone in the UK got a Jim Williams board I could borrow for a day please! Bottle of wine and all postage costs covered!

If the pulse length using a charge line is long enough then it will work great. I think you will also need some good RF attenuators though.

Gixy · « **Reply #543 on:** October 21, 2014, 04:15:37 pm »

Hi,
+1 kit here! Looking for procedure for payment and shipping. Thanks in advance.

Precipice · « **Reply #544 on:** November 12, 2014, 10:54:10 am »

I'd be interested in one, too. Want to see what this 'ere 6GHz scope can actually do!

EV · « **Reply #545 on:** November 17, 2014, 07:20:28 am »

Quote from: Precipice on November 12, 2014, 10:54:10 am

I'd be interested in one, too. Want to see what this 'ere 6GHz scope can actually do!

It is not fast enough for your scope. Risetime of Gaussian 6 GHz scope is about 350/6 = 58 ps and the risetime of Jim Williams pulse generator is about 170 ps.

Precipice · « **Reply #546 on:** November 17, 2014, 03:49:04 pm »

Err, I hope it's a little quicker than 58ns...
Also, I very much doubt that this scope is Gaussian response. I think it's one of the magical downshift-frequencies and reassemble things versions, which complicates everything. (DSA70604 - the book says that it should be 65ps 10%-90% and 45ps 20-80%. It's software upgradeable to the full 20GHz, so I'd expect that all I'm seeing is a DSP filter doing a brick-wall impression to get it down to a measly 6GHz...)
(I also have a few proper analogue scopes to hand that it'd be fun to test. (Analogue from 10MHz to 1GHz, and a few points inbetween).

free_electron · « **Reply #547 on:** November 17, 2014, 03:54:35 pm »

i have receive about a hundred bare boards. this thing has been slipping , vacation , changing jobs , remodelling the lab..
i need to pick this up again. lemme do some homework tonite.

EV · « **Reply #548 on:** November 17, 2014, 04:10:42 pm »

Quote from: Precipice on November 17, 2014, 03:49:04 pm

Err, I hope it's a little quicker than 58ns...
Also, I very much doubt that this scope is Gaussian response. I think it's one of the magical downshift-frequencies and reassemble things versions, which complicates everything. (DSA70604 - the book says that it should be 65ps 10%-90% and 45ps 20-80%. It's software upgradeable to the full 20GHz, so I'd expect that all I'm seeing is a DSP filter doing a brick-wall impression to get it down to a measly 6GHz...)
(I also have a few proper analogue scopes to hand that it'd be fun to test. (Analogue from 10MHz to 1GHz, and a few points inbetween).

Sorry, my mistake! It is ps not ns. I have edited my text. However Jim Williams pulse generators risetime is only about 170 ps. For analogue (non sampling) scopes it is fast enough.

dr.diesel · « **Reply #549 on:** November 17, 2014, 04:18:36 pm »

Quote from: free_electron on November 17, 2014, 03:54:35 pm

changing jobs

Thanks!

What is new job? Please fill us in.


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Author Topic: EEVblog #306 - Jim Williams Pulse Generator (Read 295400 times)

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