Re: Bulk buy
..., Thu Jun 01 2006, 04:37AM

as much as it pains me to think of the previous bulk buy...

I acquired a few (ok almost 100) pieces of high power silicon for a good deal I am thinking of selling off...
16x rurg8060 thinking $4/piece
16x hgtg18n120 thinking $5/piece
16x hgtg27n120 thinking $7/piece
(all in to-247 case)
40x 12a 1000v superfast (50ns) diodes (to-220 package) thinking $1/piece
if you guys want to buy me out I will sell the whole lot for $250

Also, looking at the digikey site they don't have any ucc's listed as available...

If I do get involved I plan to order some caps...

Re: Bulk buy
ragnar, Thu Jun 01 2006, 07:01AM

I'd probably take up some part of that opportunity now if I wasn't broke. =(

And besides, I'm a MOSFET guy

Re: Bulk buy
Desmogod, Fri Jun 02 2006, 01:54AM

Just spoke to Digi-key, they have 59 UCC37321's in stock, and 232 UCC37322's in stock, dip8.
So that solves that problem.
Anyone else interested, or should I just sort myself out :P

Re: Bulk buy
Electroholic, Fri Jun 02 2006, 02:24AM

I would be interested in some UCCs. how much are they?
Maybe a few IGBTs, around 10ish?
I live in canada

Re: Bulk buy
Desmogod, Fri Jun 02 2006, 02:52AM

Depends on How many we get.
If we get up to a minimum order of 25, the UCC's will be $1.98USD each.
Depending on the IGBT's we agree on, the will be anything from $2USD upwards.

EDIT:

I'll probably get a nice big bag of SIDACs too :P

Re: Bulk buy
Wilson, Fri Jun 02 2006, 07:22AM

I need some more UCCs and some IGBTs
I'll participate providing that nothing like last time happens again...

Re: Bulk buy
ragnar, Fri Jun 02 2006, 10:46AM

I'll make available my US mailbox exchange so you can get it DHL couriered into Aus for redistribution. It's not free, though. Similarly, Peter (...) probably (understandably) won't want to be USGUY unless he gets a cut on the side to make up for the last time where he lost a few bucks...

Re: Bulk buy
Self Defenestrate, Fri Jun 02 2006, 01:31PM

I'm interested in procuring some more sidacs, Digikey number K3001F1-ND, 330v 1a.

Re: Bulk buy
Electroholic, Fri Jun 02 2006, 02:15PM

I'm IN!

8X 37321
8X 37322
and 10X IGBTs, anythign along the 40N60s lines would be fine for me.
I can do paypal.

Re: Bulk buy
Wilson, Sat Jun 03 2006, 09:19AM

I might be interested in some sidacs too.
Any suggestions of what type of IGBT to get?
I don't really mind as long as its DRSSTC decent.

Re: Bulk buy
ragnar, Sat Jun 03 2006, 01:07PM

I'd say, help Peter offload some of his.. =P

Re: Bulk buy
Wilson, Sat Jun 03 2006, 01:43PM

I'm just wondering if there is enough to go around :P

Re: Bulk buy
Michael W., Sat Jun 03 2006, 02:23PM

Anyone for any 942c20p15k's? I'm not sure about a price, or if digikey sells them, their sites down right now...

Re: Bulk buy
..., Sat Jun 03 2006, 05:53PM

the digikey site is quite unreliable, just check back in a minute and it will work fine.

From the looks of it they only have the 940c series, no 942c's to be found on the site


The normal place (rell) has the minimum order of 52 caps, so we may need a few more people to get this off the ground. If necessary I may be able to buy some for myself. McFluffin also seems interested.

The only problem I see is that both the normal and Pb free ones are listed as 'on order'... I remember someone saying that meant that they were just waiting for someone to place the minimum order before they buy more...

Re: Bulk buy
Michael W., Sat Jun 03 2006, 06:41PM

That sounds like it would be a long waiting time for them to ship....

Re: Bulk buy
McFluffin, Sat Jun 03 2006, 08:27PM

942c20p15k... 0.15uF, 2kV, a little over $2.50 each it seems. For my 10.5kV tesla coil, how many of these might I need? It sounds like that might get expensive very quickly from the 100 capacitor MMCs I've seen. Of course, these seem to have pretty high capacitance compared to others I have seen, so maybe I wouldn't need too many. From what I understand, a string of 10 of these guys making a 3J capacitor rated for 20kV isn't bad. Don't want to get a full discussion in sale/trade, just a rough estimate on how many I might need.

Re: Bulk buy
..., Sat Jun 03 2006, 08:41PM

what current are you running? To calculate the value for your mmc you need to know voltage and current of the power source, then you can calculate what the resonant value, and then go to about 1.5x that

For a 30ma transformer you are looking at about a 7.5nf resonant cap... So if you use a string of 15 you could tak on whichever cap you need for good tuning... Or just use the ones you happened to find

Re: Bulk buy
McFluffin, Sun Jun 04 2006, 05:47AM

Odd how things go, but I managed to get 51 1.6kV .027uF caps today. They seem to be working fine for some simple spark gap tests(I made 3 strings of 12, going to make a fourth). I might just see how things go with them before I pitch in for the group buy. Of course, if my calculations are correct, thats only about 14nF.

Re: Bulk buy
Steve Ward, Sun Jun 04 2006, 07:57AM

For a 30ma transformer you are looking at about a 75nf resonant cap

You are off by a factor of 10 . 7.5nF is resonant at 10.5kV 30mA. So you only want 11.25nF for LTR, that gives only a single string of 13 caps. I thought i should clear that up.

Very few coils use upwards of 25 of those MMC caps.

Re: Bulk buy
..., Sun Jun 04 2006, 04:35PM

wow, my bad

That seems more resonable, crazy simluator that took .03a as .3a (I just checked, if you type in .03 it changes it to .3 )

So ya, you only need like 13 caps

Re: Bulk buy
McFluffin, Sun Jun 04 2006, 04:52PM

Well, the caps I just got are more than that, so I think I'll try using two of my four strings then since that will be 7.2nF, which is pretty close.

Re: Bulk buy
Desmogod, Tue Jun 06 2006, 01:38AM

Ok,
Heres the part numbers that I want.

FGA40N60UFDTU_NL-ND x 20
ucc37321p x 10
ucc37322p x 10
K3001F1-ND x 20


I may be interested in some caps if we can reach the price break and they are cheap enough.
Can everyone else who DEFINATELY wants to join in, please add their order in bold so I can total it up?
Cheers
Jim

Re: Bulk buy
..., Tue Jun 06 2006, 02:30AM

if needed I can put in for $100 worth in caps... I was hoping to wait a little and do more prototyping on my royer curcuit before 'production' but I think I can handle buying the caps now...

I could also use 50x 12v zeners (1/2 watt)

Re: Bulk buy
Wilson, Tue Jun 06 2006, 04:08AM

For now, i'll have:
FGA40N60UFDTU_NL-ND x 10
ucc37321p x 3
ucc37322p x 3
And if possible:
UC3843ANOS-ND x 5
Thats about all i can think of atm

Thanks,
Wilson

Re: Bulk buy
Electroholic, Tue Jun 06 2006, 05:18AM

FGA40N60UFDTU_NL-ND x 10
ucc37321p x 4
ucc37322p x 4

Thanks

Re: Bulk buy
ragnar, Tue Jun 06 2006, 06:18AM

Erm. I'm not sure if I have the motivation to administrate this one with the website etc =P

Still, if nobody else wants to do it / can do it better.... let me know if I can help, guys.

Re: Bulk buy
Desmogod, Tue Jun 06 2006, 08:01AM

Well, I don't have paypal, and not too many people seem overly interested, so I might just order a heap of stuff that I actually need, and put everything else on fleabay.
Otherwise it might turn into a cat herding experiment.

Re: Bulk buy
Self Defenestrate, Tue Jun 06 2006, 01:40PM

The sidacs are actually K3000F1-ND, not K3001F1-ND. I'm down for ten.

K3000F1-ND x 10

Re: Bulk buy
Wilson, Wed Jun 07 2006, 04:52AM

I'll have K3000F1-ND x 5 too thanks.

Re: Bulk buy
Desmogod, Wed Jun 07 2006, 08:15AM



Is this for a SiSG?
Surely you would need a LOT more than 5?

Re: Bulk buy
Wilson, Wed Jun 07 2006, 01:55PM


lol, fair enough. Point taken. I'll have 15 then

Re: Bulk buy
Wilson, Wed Jun 07 2006, 02:13PM


EDIT: whoops, not sure how i double posted...
A mod should delete this if they see fit.

Re: Bulk buy
Desmogod, Thu Jun 08 2006, 03:07AM

Ok, so far I have.....

FGA40N60UFDTU_NL-ND x 40
ucc37321p x 17
ucc37322p x 17
K3001F1-ND x 45

Anyone else in? As I'm going to close this as of 00:00 midnight (WST Australia) on 9th June 06 :)

I have set up paypal, and when I have everyone's details, I'll figure out postage etc etc etc

Re: Bulk buy
Desmogod, Wed Jun 14 2006, 01:41AM

Sorry for not being online, but I've been off work sick
If everyone sends me a PM with parts ordered, and total cost in USD of parts and their location, I'll reply with postage costs and my paypal details etc.

Here's the costings from digikey, PLUS we need shipping added to this cost!

1 45 FGA40N60UFDTU_NL-ND IGBT ULTRAFAST 600V 40A TO3P 0 2.93400 $132.03
2 17 UCC37321P IC MOSFET DRVR SGL HS 9A 8-DIP 0 2.48000 $42.16
3 17 UCC37322P IC MOSFET DRVR SGL HS 9A 8-DIP 0 2.48000 $42.16
4 45 K3000F1-ND SIDAC 270-330VBO 1AMP TO-202 0 0.86000 $38.70

Re: Bulk buy
Wilson, Wed Jun 14 2006, 02:38AM

Anyone interested in getting a few more UCCs so we can get to the 25+ price break? Its a whole 50c off for each

Re: Bulk buy
LarsE, Thu Jun 15 2006, 01:24AM

If it isn't too late i take:
6* UCC37321P
6* UCC37322P
12* FGA40N60UFDTU_NL-ND

Re: Bulk buy
Desmogod, Fri Jun 16 2006, 02:18AM

Not a problem Lars, that puts us over the price break for UCC's too

I've just set up a paypal account, is it just my paypal email address you guys need? I have never used it before...

Re: Bulk buy
..., Fri Jun 16 2006, 03:00AM

glad to hear you have finally fallen to the dark side of ebay [evil laugh]

Just the e-mail addy is enough, and if you people are smart enough you can tell paypal to send you address along with the order, which allows (if there is a postal service that will provide it) desmo to just click and print the lables (postage included)

Re: Bulk buy
Desmogod, Mon Jun 19 2006, 05:21AM

Can everyone please add 5% to their orders for coverage of paypal costs, and go here -

To calculate the shipping prices and service they want.
Please note that that site is in $AUD.

Then add the lot up and PM me with the TOTAL price, and I'll give you my paypal details.

Re: Bulk buy
Desmogod, Thu Jun 22 2006, 04:22AM

Alright guys, I have PM'd you all in regards to pricing and my paypal details, so pop the money in and I'll order it all!!
w00t!