EEVblog #306 - Jim Williams Pulse Generator

[jpb]

Ok , post office drop was successful. I will cut the remaining orders tonight ( i need to cut the case openings ).

Then i will know exactly what i have left. I will post tonight what is still availalble. People who already mailed me are first in queueu of course.

I have several calibrated kits availalble as well as parts and pcb's.

Hi free_electron,

I just wanted to check that by "mailed me" you mean pm on this forum (rather than e-mail)? I realise that you're very busy at the moment, but I just want to check that the pms I've sent have been sufficient to get my name on the waiting list even though you've not had the chance to reply directly.

jpb

[ml-eng]

Hi, are there one or two pieces left over for sale? I would I would buy them immediatly. 

[free_electron]

I have leftovers yes. Hang in there.
Its busy time and then there is the orders from the other forum i need to take care off as well.
By this weekend everything will be shipped and i will have a clear picture of what is left

[ml-eng]

Thank you, I will watch the thread.

[fmaimon]

I will post the final cal screenshots this weekend. Last batch goes out the door tomorrow. Fmaimon was in the last batch.(last week)

Thank you! 

[BravoV]

I will post the final cal screenshots this weekend. Last batch goes out the door tomorrow. Fmaimon was in the last batch.(last week)

Was that mine included or its already shipped at previous shipping batch ?

[free_electron]

Yours went out last week.

[BravoV]

Thank you.

[G7PSK]

Well I finally put mine together, got a fright when it would not turn on not even the led would light up, I thought the chip might be the wrong way round, turned out that a small piece of plastic film on the battery just where the contact was, why do they hve to wrap every thing in the stuff, no proper test results yet as I have got to get connections and terminators.

[BravoV]

Got my kits today, I really appreciate the effort done to pack those tiny buggers into different small bags. 

Also thanks a lot for the little 9 GHz beast. 

Now the hardest part, finding the time to assemble and thoroughly test both kits.  ...<sigh> ..

[BravoV]

I will post the final cal screenshots this weekend. Last batch goes out the door tomorrow. Fmaimon was in the last batch.(last week)

Vincent, understand you're busy, any chance to post the rest of the cal screenshots this weekend ? tia

[free_electron]

Yep. Absolutely. Everything is out the door now. Weekdays are difficult. By the time i'm done at work i can't see a computer anymore . It's crunch time..

[kcozens]

I only recently saw the EEVblog video about the pulse generator. Are any more kits available?

[free_electron]

I'll post an updat tonight. Everything os put the door. There are kits and cals left and a few bare boards as welll. How many ... I need to cou t em.

[uoficowboy]

I'll post an updat tonight. Everything os put the door. There are kits and cals left and a few bare boards as welll. How many ... I need to cou t em.

I would be interested as well!

[e-pirate]

Is it critical to use 50 ohm resistor on the output? I have 50.85 (handpicked out of a dozen of 51), can I use it?

[c4757p]

No, it must be 50.00000000 

That's within 2% of 50. I'd say it's quite close enough.

[free_electron]

Here is what is left :

3 kits ( uncalibrated )
8 calibrated versions

no more bare boards.

there are people who already contacted me so these get priority ( if they still want one )

i actually have 10 calibrated versions left but i'm hanging on to two as i have not had confirmation from everyone that they received theirs... you never know. stuff can get lost in the mail .especially to 'certain' countries. once i have confirmation from everyone i will release these as well.

[BravoV]

Vincent, the rest of those unposted cal screen shots please.

[Neganur]

Sorry if I missed you asking for confirmation; still swamped with work.
The items arrived in the beginning of April. Ty!

[free_electron]

Ah yes. I will post the other screenshots today.

[free_electron]

right, the people who were in the 'pending' queue have all got an email with instructions.
if you have not had an email ; you are still in the pending queue. don't despair yet !

i am releasing 8 CAL boards and 2 bare PCB's. so 8 people have had an PM with instructions. ( in order i received the requests )

there is actually 3 more CAL boards available but i am holding on to these until it is confirmed everyone has received his package.... just in case one gets lost in the mail i want to have backups. Once i got full confirmation those will be released as well.

If there is enough interest in this thing i will do another PCB run later this year but this will be 'KIT' only. no more CAL. Getting my hands on the "unobtainium scope" is too taxing on my bank of 'favors'

I have plenty of the 'gold leaded' NOS transistors.

i will try to post the remaining CAL documents asap. It's a bit 'crunch time' (i got three new 'babies' to deliver...) at work and when i get home i'm not in the mood to stare at computer screens anymore..

[free_electron]

right. people who have jumped the backend :


C4757P     1 cal
John_L     1 cal 1 pcb
rubbrdux   1 cal 1 pcb
carpelux   1 cal
jpb        1 cal
beaker353  1cal

electrowolf 1cal

plex  2cal  <- pending ...


There are 3 other people that have gotten mail but no response yet..

So right now i'm holding as this potentially allocates remaining stock.

The guys above are confirmed and will ship later this week.

[jpb]

Thanks Vincent.

I look forward to getting my kit.

[sdscotto]

I received my kits yesterday.  Thank you! 

I built one up this morning and put it on my fastest [working] scope, a Tektronix MSO3034.   Photo attached.