Factory 2DW23x order aggregation thread - Page 1
Forum section: electronics / general

author: technix
author_rank: Super Contributor
timestamp: February 07, 2017, 01:24:32 am
content: I have struck a deal with Shanghai 17th Radio Factory, who makes those ultra-low-noise 2DW23x Zener diodes. I can source those parts directly from the factory at 75 US cents each, and each order up to about 1500-2000 pieces will cost 5 US dollars to post through air mail. The factory also set a minimum aggregated order amount of 100 before they would waiver the $5 handling fee.I am starting this thread so you guys can match and aggregate orders before I submit it to the factory. If you have posted an order here please also send a PM to notify me. I will send you a PM as well as update this thread to reflect the current aggregated order number, and if it managed to reach 100 at noon Beijing Time every Tuesday I will place an order to the factory.Sent order list: (Total: 1915)TypeNameQtyCountryFlags2DW232Assaf10IsraelPSD2DW233Assaf10IsraelPSD2DW233Lukier20United KingdomPSD2DW233mmagin10USAPSD2DW233Harfner20GermanyPSD2DW233douardda40FrancePSD2DW233enut1120AustraliaPSD2DW232bertik10FrancePSD2DW233bertik10FrancePSD2DW234bertik10FrancePSD2DW232nadona25USAPSD2DW233nadona25USAPSD2DW233pmcouto20PortugalPSD2DW232julian110AustraliaPSD2DW233julian110AustraliaPSD2DW234julian110AustraliaPSD2DW235julian110AustraliaPSD2DW236julian110AustraliaPSD2DW232rastro10USAPSD2DW233rastro10USAPSD2DW232svangool20NetherlandsPSD2DW232mimmus7810ItalyPSD2DW233mimmus7810ItalyPSD2DW232rachaelp10UKPSD2DW233rachaelp10UKPSD2DW232elecdonia10USAPSD2DW233elecdonia10USAPSD2DW232technogeeky10USAPSD2DW233technogeeky10USAPSD2DW232RandallMcRee20USAPSD2DW232peter.mitchell100AustraliaPSD2DW232CaféNoir50FrancePSD2DW233CaféNoir30FrancePSD2DW232iainwhite10USAPSD2DW233iainwhite10USAPSD2DW232picburner20ItalyPSD2DW232chickenHeadKnob25PSD2DW232cellularmitosis20USAPSD2DW235IconicPCB25AustraliaPSD2DW236IconicPCB25AustraliaPSD2DW232vindoline15USAPSD2DW233vindoline15USAPSD2DW234chuckb600USAPSD2DW235chuckb100USAPSD2DW232Muxr100USAPSD2DW232uwezi10SwedenPSD2DW233uwezi20SwedenPSD2DW234uwezi10SwedenPSD2DW232alm15The NetherlandsPSD2DW233alm15The NetherlandsPSD2DW232Vojtech15CzechPSD2DW233Vojtech15CzechPSD2DW232Rycroft10AustraliaPSD2DW233Rycroft10AustraliaPSD2DW232maerki10SwitzerlandPSD2DW233maerki10SwitzerlandPSD2DW234maerki10SwitzerlandPSD2DW232BU508A10GermanyPSD2DW233BU508A10GermanyPSD2DW234BU508A10GermanyPSD2DW232SZA26320ItalyPSD2DW233SZA26320ItalyPSD2DW232welterde10GermanyPSD2DW233welterde10GermanyPSD2DW234welterde10GermanyPSD2DW232floobydust10CanadaPSD2DW232Dave50SloveniaPSD2DW232texaspyro20USAPSD2DW233texaspyro20USAPSDProcessing Order List: (0/100)TypeNameQtyCountryFlagsOutstanding Order List: (70/100)TypeNameQtyCountryFlags2DW232Octane20USA2DW233Octane10USA2DW234Octane10USA2DW232cellularmitosis10USA2DW233cellularmitosis10USA2DW234cellularmitosis10USAI am now accepting both PayPal and bank T/T as methods of payment. T/T will be preferred for orders equal to or more than 100 pieces in one go. If you wish to pay via T/T, please make sure you can work with OpenPGP-encrypted Email traffic, as I do not want to send my banking details unprotected.

author: Assafl
author_rank: Frequent Contributor
timestamp: February 07, 2017, 02:30:50 pm
content: You can sign me up for 10-20. Thx, AssafPS - if you prefer this in the form of a list - here it is - please copy below and add the quantity you are interested in:Name Qty CountryAssaf 20 Israel

author: technix
author_rank: Super Contributor
timestamp: February 07, 2017, 02:53:07 pm
content: Quote from: Assafl on February 07, 2017, 02:30:50 pmPlease specify the part number.

author: lukier
author_rank: Unknown
timestamp: February 07, 2017, 03:14:35 pm
content: Please sign me up for 20 as well.TypeNameQtyCountryTBDAssaf20Israel2DW233Lukier20United Kingdom

author: Assafl
author_rank: Frequent Contributor
timestamp: February 07, 2017, 03:39:16 pm
content: TypeNameQtyCountry2DW233Assaf20Israel2DW233Lukier20United Kingdom

author: mmagin
author_rank: Frequent Contributor
timestamp: February 07, 2017, 05:32:01 pm
content: TypeNameQtyCountry2DW233Assaf20Israel2DW233Lukier20United Kingdom2DW233mmagin10USA

author: Harfner
author_rank: Contributor
timestamp: February 09, 2017, 08:08:29 am
content: Type Name Qty Country2DW233 Assaf 20 Israel2DW233 Lukier 20 United Kingdom2DW233 mmagin 10 USA2DW233 Harfner 20 Germany(As already sent by PM)

author: bertik
author_rank: Contributor
timestamp: February 09, 2017, 08:31:28 am
content: Hello,thanks for offering this opportunity again!Would you also offer the 2DW232 as well?It seems to have considerably less noise according to my measurements -though this may be batch dependent.Thanks,Bertik

author: technix
author_rank: Super Contributor
timestamp: February 10, 2017, 12:57:29 am
content: Quote from: Flinstone on February 09, 2017, 09:08:04 pmAccording to what I have heard from the factory, they don't have any websites or public individual datasheets.

author: douardda
author_rank: Regular Contributor
timestamp: February 11, 2017, 05:42:58 pm
content: HiI'm also interested:2WD233 douardda 40 FranceThanksEnvoyé de mon GT-N7105 en utilisant Tapatalk

author: Gyro
author_rank: Super Contributor
timestamp: February 11, 2017, 08:39:28 pm
content: Quote from: Flinstone on February 11, 2017, 05:05:08 pmYou need to do more reading of what has gone before!The low noise process was developed by this factory and this factory only. The ones generally available on Taobao, aliexpress etc are likely to be either low quality from other manufacturers, low quality falsely re-marked or downright fakes. See post (and several earlier posts in the same thread):https://www.eevblog.com/forum/metrology/ultra-low-noise-reference-2dw232-2dw233-2dw23x/msg1080256/#msg1080256The price the factory is charging is the only relevant one.

author: enut11
author_rank: Super Contributor
timestamp: February 12, 2017, 04:24:48 am
content: I will take 10 diodes. Will PM technix today.enut11

author: bertik
author_rank: Contributor
timestamp: February 12, 2017, 09:39:07 am
content: Thanks for your efforts!Count me in for 10 more -Bertik, France

author: Gyro
author_rank: Super Contributor
timestamp: February 12, 2017, 03:37:05 pm
content: Quote from: Flinstone on February 12, 2017, 06:47:45 am(My highlight)Frankly, I don't think that's the case at all, or technix's intention. I am not surprised that the factory would charge a higher factory gate price to supply parts to a 'member of the public' and charge a handling fee for such low volumes. Many (most) chip manufacturers wouldn't be prepared to do business on this basis at all. A factory charging a higher price for a premium quality low noise reference zener variant is not unexpected. Other members have also purchased parts from Taobao / Aliexpress with diamond logos only to find that the delivered parts were just re-marks of inferior ones (as is common practice), the logo is no guarantee at all (which is why Zlymex had to sample test them before shipping!).The parts that Zlymexvery kindlysupplied were very low noise, so undoubtedly from the 17th Radio Factory, however their zero TC current was way in excess of the generic datasheet value for a 2DW233: around 20mA (from my and others' measurements) versus 5mA. They achieve low noise as 'advertised' but given that they came from Aliexpress in plastic bags at low cost could well mean that they had failed a non noise related parametric test. There's no way to tell one way or the other as there was no supply chain traceability. Iirc, the testing that technix has done indicates a the zero TC current of the factory x233 parts is around 5mA. If that proves not to be the case, then people might then have some reason to question.To repeat, Zlymex was a perfect gentleman in sourcing parts which at the time were not easily available to the community (based on the information available to him from Chinese language forums) and achieved the expected low noise performance. He was not however in the right location to be able to visit the factory and negotiate parts directly.At the end of the day, it is a matter of trust for individual members to choose whether to purchase in this thread or not. If they wish to question the selling price then they should probably go elsewhere. You should undoubtedly go and do whatever you wish to do without recourse to this thread.

author: nadona
author_rank: Regular Contributor
timestamp: February 12, 2017, 07:32:45 pm
content: Thanks for the offer.I'd like to get 50 of 2DW233, US

author: pmcouto
author_rank: Unknown
timestamp: February 12, 2017, 08:35:01 pm
content: Thanks for organizing this group-buy.I'd like to buy 20 of 2DW233, Portugal.

author: julian1
author_rank: Frequent Contributor
timestamp: February 12, 2017, 10:18:01 pm
content: QuoteTo note, the 233 has a more easily manageable TC0 current of around 5mA.But according to Bertik's tests the desirable series configuration of the 233 (sourced from technix) has a much higher noise figure of 4uV p2p. This compares 0.5uV p2p for the 232.https://www.eevblog.com/forum/metrology/ultra-low-noise-reference-2dw232-2dw233-2dw23x/msg1113975/#msg1113975To rule out any questions of provenance - this is likely entirely consistent with the influence that higher current plays in lowering noise seen across zener devices - including the ltz1000.So as Bertik notes, there is quite some tension to obtain a reasonably low TC0 point and low noise at the same time. This is also why I felt it was useful to focus my experiments on a circuit design capable of managing the higher TC0 current point of the 232.

author: technix
author_rank: Super Contributor
timestamp: February 13, 2017, 02:00:15 am
content: Quote from: julian1 on February 12, 2017, 10:18:01 pmPlease do not forget to specify which part you intend to buy.

author: enut11
author_rank: Super Contributor
timestamp: February 13, 2017, 02:39:14 am
content: @technix20 of 2DW233 for Australiaenut11

author: bertik
author_rank: Contributor
timestamp: February 13, 2017, 12:01:16 pm
content: I should clarify: 2DW233 is also OK, though 2DW232 preferred.Thanks,bertik

author: julian1
author_rank: Frequent Contributor
timestamp: February 13, 2017, 05:03:09 pm
content: QuoteHi technixWould it be possible to get a small selection of each type? 10x 2dw232, 10x 2dw233, 10x 2dw234, 10x 2dw235 if it exists? It would be interesting to do some more characterization of each type. I can pay paypal.

author: technix
author_rank: Super Contributor
timestamp: February 14, 2017, 12:52:45 am
content: Quote from: julian1 on February 13, 2017, 05:03:09 pmSure you can.

author: technix
author_rank: Super Contributor
timestamp: February 14, 2017, 07:09:54 am
content: Folks that is ordering parts through me, please confirm the order and send me your Email address. (if this is still not working smoothly I will try another method of coordinating this, although if we go down that route you guys will have to pay a bit extra.)

author: rastro
author_rank: Frequent Contributor
timestamp: February 14, 2017, 06:20:47 pm
content: I would be interested:10 of 2DW232, US10 of 2DW233, US

author: zhtoor
author_rank: Frequent Contributor
timestamp: February 16, 2017, 07:31:31 pm
content: Hello Sir,can you ship to Pakistan?regards.

author: mimmus78
author_rank: Unknown
timestamp: February 16, 2017, 08:13:33 pm
content: I would be interested to:10 of 2DW23210 of 2DW233both shipping to Italy.

author: SvanGool
author_rank: Regular Contributor
timestamp: February 17, 2017, 10:13:34 am
content: I would be interested in: 20X 2DW232 (EU-NL)You have my credentials, thanks !

author: rachaelp
author_rank: Unknown
timestamp: February 17, 2017, 11:13:44 am
content: Hi technix,Thanks for organising this group buy, I'd like to get some of these parts too please if that's ok.10 x 2DW23210 x 2DW233I'm located in the UK and can pay you by PayPal. I'll send you a PMMany thanks,Rachael

author: rsjsouza
author_rank: Super Contributor
timestamp: February 17, 2017, 01:20:40 pm
content: Quote from: Gyro on February 12, 2017, 03:37:05 pmIt's not as it this does not happen in real life, right?Flinstone, I don't think it is wrong of you to source parts locally - good for you. However, others will not have the same resources to pursue this avenue directly.Late last year I received 20 2DW233 parts from technix and I can't thank him enough for his willingness to do this.

author: rastro
author_rank: Frequent Contributor
timestamp: February 17, 2017, 02:15:51 pm
content: Quote from: technix on February 07, 2017, 01:24:32 amJust to clarify what we should send via PayPal. Do we just multiply the order quantity by $0.75 US by the quantity?

author: technix
author_rank: Super Contributor
timestamp: February 21, 2017, 02:35:59 am
content: $0.75 * part count + $5. The $5 goes to the post office.

author: zhtoor
author_rank: Frequent Contributor
timestamp: February 22, 2017, 02:00:46 am
content: Quote from: technix on February 21, 2017, 02:35:59 amhello technixi shall be interested in:-25 x 2DW232i am located in Pakistan. tell me how to send you money for these including postage.regards.

author: elecdonia
author_rank: Frequent Contributor
timestamp: February 22, 2017, 06:16:50 pm
content: Hello technix. I would like to purchase:10 2DW232 USA10 2DW233 USAI sent you a PM with details.Thanks very much!

author: technix
author_rank: Super Contributor
timestamp: February 26, 2017, 05:32:24 am
content: 320 pieces ordered, should arrive next Tuesday, and will be sent out next Saturday. Orders is accumulating for the next batch.

author: technogeeky
author_rank: Frequent Contributor
timestamp: February 26, 2017, 12:17:56 pm
content: 10 2DW232 USA10 2DW233 USAI don't see the price listed anywhere, but I assume these are super cheap.I'm a little confused what the other ones are (the 2DW23x where x = 4,5,6...).PM sent

author: RandallMcRee
author_rank: Frequent Contributor
timestamp: February 26, 2017, 05:11:36 pm
content: 20 2DW232 USAFor previous poster:I don't see the price listed anywhere, but I assume these are super cheap.$0.75 per + $5 postageI'm a little confused what the other ones are (the 2DW23x where x = 4,5,6...):operating current, see other threadhttps://www.eevblog.com/forum/metrology/ultra-low-noise-reference-2dw232-2dw233-2dw23x/Found the important bit for you:The type number(2DW232, 2DW233) indicating different nominal zener current for this zero-TC point. For instance, the zero-TC current of 2DW232 is 5mA, the zero-TC current of 2DW233 is 7.5mA, the zero-TC current of 2DW234 is 10mA, and so on.But in reality, there is not much difference. A device of any type may show zero-TC current at any value ranging from 4mA to 20mA, therefore, there is need to test every device for it's zero-TC current.It does take some digging I'm afraid.Anyway, PM sent, for my order. Thanks!!

author: dhillman
author_rank: Contributor
timestamp: February 27, 2017, 10:54:14 am
content: Qty. 20 2DW232 CanadaThank you

author: peter.mitchell
author_rank: Super Contributor
timestamp: February 27, 2017, 11:55:53 am
content: 100 2DW232 to Australia

author: technix
author_rank: Super Contributor
timestamp: March 01, 2017, 12:08:15 pm
content: The first aggregation arrived. I am going to send them on next weekend (there have been a bit of accident in my day job and I have to work for an extra day to make it up.)

author: CaféNoir
author_rank: Newbie
timestamp: March 06, 2017, 12:43:18 pm
content: Hello,I would be interested in:50 2DW232 France50 2DW233 FranceRegards

author: iainwhite
author_rank: Unknown
timestamp: March 06, 2017, 01:53:47 pm
content: technix,I would like to purchase:2DW232 iainwhite 10 USA2DW233 iainwhite 10 USAThank you for providing this service.

author: picburner
author_rank: Frequent Contributor
timestamp: March 07, 2017, 10:26:55 am
content: Hi technix,I would be interested in:20 pcs 2DW232 ItalyI send you a PM with my email and address.

author: technix
author_rank: Super Contributor
timestamp: March 07, 2017, 01:23:55 pm
content: For the folks that have posted your order, please PM me your shipping address. I will reply you with my payment information. I am accepting payment in PayPal.

author: technix
author_rank: Super Contributor
timestamp: March 11, 2017, 05:41:28 am
content: Orders in what was Processing Order List is sent. Please keep an eye in your mailbox for the coming weeks.The current aggregation will be kept open for another week as my accountant will be on leave for the next week. We have reached the minimum order limit though so your smaller orders can be placed alongside it.

author: mleyden
author_rank: Contributor
timestamp: March 13, 2017, 03:04:46 pm
content: Hello,I would be interested in:20 2DW232 Ireland20 2DW233 IrelandWill PM email and addressThanksMark

author: mmagin
author_rank: Frequent Contributor
timestamp: March 24, 2017, 04:02:34 am
content: Thanks. My order arrived.There seems to be a lot of confusion about with regard to the pinout... For the 2DW233, I'm finding that the common cathode is the pin connected to the case, and the others are the two anodes. Vz of each of the individual diodes is around 5.36V and the pair in series (i.e. between the two non-case pins) is about 6.17V.But is each of the diodes exposed to the outside a TC zener reference, or is the pair used in series the TC reference?

author: technix
author_rank: Super Contributor
timestamp: March 25, 2017, 01:54:18 pm
content: For folks on the outstanding order list please check if you have paid me or not. I will cut off the list next week, and any unpaid orders will have to wait again.

author: enut11
author_rank: Super Contributor
timestamp: March 30, 2017, 02:19:16 am
content: Hi technixOrder for 20 x 2DW233 for Australia has arrived. Thank you very much for organising this.enut11

author: julian1
author_rank: Frequent Contributor
timestamp: April 05, 2017, 08:38:38 am
content: Thanks for your effort @technix. Your package arrived here safely. Zeners are nicely organized and labeled.

author: technix
author_rank: Super Contributor
timestamp: April 05, 2017, 01:17:06 pm
content: First batch of order is arriving, and I am looking forward to test results. There are still a few buyers not paying me (and thus delaying the second batch) but I am going to cut those orders off soon.

author: Harfner
author_rank: Contributor
timestamp: April 05, 2017, 06:39:07 pm
content: The package arrived Friday, but I only managed today to get it from the post office. Unfortunately, I will not be able to measure performance right away.Many thanks for the effort, Technix,

author: Assafl
author_rank: Frequent Contributor
timestamp: April 06, 2017, 02:28:43 pm
content: Received mine today. Thank you technix!

author: pmcouto
author_rank: Unknown
timestamp: April 06, 2017, 05:49:03 pm
content: Received the parts today.Thank you technix!

author: RandallMcRee
author_rank: Frequent Contributor
timestamp: April 06, 2017, 06:04:47 pm
content: It's been a while. Those who have not paid should be demoted to a third-tier--should you wish to continue this task.Thanks for doing this.Randy (second-tier).

author: technix
author_rank: Super Contributor
timestamp: April 07, 2017, 01:47:08 pm
content: Quote from: RandallMcRee on April 06, 2017, 06:04:47 pmI have sent them a second PM regarding this. Should they still refuse to pay I will cut them off the waiting list. In fact the tier you are in is the third (Finished List, Processing List and Accumulating Queue.) After the cut the unpaid orders stays in the third while the bulk promotes to the second.

author: technix
author_rank: Super Contributor
timestamp: April 10, 2017, 03:07:21 pm
content: I have placed the accumulated order to the factory. They ran out of 2DW232 stock and have a leading time of 2-3 weeks.Unpaid orders are cut off from this order and remained in the outstanding list.

author: rastro
author_rank: Frequent Contributor
timestamp: April 27, 2017, 07:39:24 pm
content: Received partsThank You for doing this.2DW232 rastro 10 USA PSD2DW233 rastro 10 USA PSDrastro

author: technogeeky
author_rank: Frequent Contributor
timestamp: May 05, 2017, 03:45:20 pm
content: Just checking in here to see the status... The first post has the information and labelsPSD, but it doesn't seem to specify what each flag means.I'm guessing:Paid - the user paid by Paypal or otherwise.Sent - the order has been sent to the factory.Delivered - the order has been delivered to the user.It looks like nobody on the 2nd order has gotten their order yet, so I assume all is in order and nothing has been lost in the mail yet.Thanks,-tg

author: technix
author_rank: Super Contributor
timestamp: May 06, 2017, 04:29:40 am
content: The marks are Paid, Sorted and posteD.

author: cellularmitosis
author_rank: Unknown
timestamp: May 08, 2017, 09:05:50 am
content: Thanks so much for organizing this technix!I'd like to order 20 of 2DW232.PM sent with additional info.

author: IconicPCB
author_rank: Super Contributor
timestamp: May 16, 2017, 03:50:06 am
content: Hello Technix,Thanks for putting up with this effort of procuring the diodes.Please provide25 pieces of 2DW236.25 pieces of 2DW235.If above materials are not available I will take what ever is available.

author: technix
author_rank: Super Contributor
timestamp: May 16, 2017, 04:46:45 am
content: Updated the post reflecting the current aggregation status. The processed orders was sent two weeks ago and should arrive very soon.

author: cellularmitosis
author_rank: Unknown
timestamp: May 17, 2017, 04:46:37 am
content: Hi technix,Can you increase my order by 5 additional units, so that the outstanding group order jumps from 95 to 100?(I'll also send a PM)

author: iainwhite
author_rank: Unknown
timestamp: May 19, 2017, 12:55:53 pm
content: FYI - my order arrived on Wed (May 17th) . Thanks Technix!

author: RandallMcRee
author_rank: Frequent Contributor
timestamp: May 20, 2017, 10:10:55 pm
content: Also 20 received today here in California.Thanks again!

author: peter.mitchell
author_rank: Super Contributor
timestamp: May 23, 2017, 11:43:16 pm
content: Mine arrived yesterday, had almost forgotten about them, cheers mate!

author: vindoline
author_rank: Unknown
timestamp: May 24, 2017, 04:25:09 pm
content: Hi Technix, I know I'm late to the game here, is it still possible to order 20-25 pieces?

author: technix
author_rank: Super Contributor
timestamp: May 24, 2017, 04:34:22 pm
content: Quote from: vindoline on May 24, 2017, 04:25:09 pmYes it is. I will add you to the waiting list.

author: technix
author_rank: Super Contributor
timestamp: May 26, 2017, 02:40:48 pm
content: Quote from: vindoline on May 24, 2017, 04:25:09 pmPlease confirm your order, both quantity and number.

author: vindoline
author_rank: Unknown
timestamp: May 30, 2017, 12:24:39 am
content: Done by PM

author: Muxr
author_rank: Super Contributor
timestamp: May 30, 2017, 03:50:03 am
content: I too have ordered some via PM.. Thank you Technics!

author: picburner
author_rank: Frequent Contributor
timestamp: June 05, 2017, 09:39:00 am
content: Received 20 2DW232 today.Thanks for organising this group buy technix!

author: uwezi
author_rank: Unknown
timestamp: June 15, 2017, 08:17:46 am
content: For the next round I am interested in10pcs 2DW23220pcs 2DW23310pcs 2DW234details send by pm.

author: mimmus78
author_rank: Unknown
timestamp: June 15, 2017, 08:58:32 am
content: Thanks to technix, my 20 pcs order was just delivered to Italy :-)

author: alm
author_rank: Super Contributor
timestamp: June 15, 2017, 04:32:23 pm
content: PM sent for:15x 2DW23215x 2DW233

author: chickenHeadKnob
author_rank: Super Contributor
timestamp: June 16, 2017, 01:05:28 am
content: ALMgood to see you back with us on the forum, you were missed.My 25 arrived today after 2 months time. There is something definitely wonky in the China post to Canada post custody chain. Normally an order from ebay Hong Kong or mainland takes 21 to 25 days on the dot. I go many months without ordering anything but in the period from the last half of march to april 12 I had a flurry orders for various components from different sellers, all ranked reliable. Shipments from Japan, Slovenia and US came fast: 8 to 14 days and stuff from China after April 12 came in the usual 21 -25 days although one was in reverse chronological order. But I have 3 shipments from the "black hole period" still pending, technix diodes now crossed off that list. It is very strange. I am not out a lot of money so am not going to cry however it makes planing projects harder as I never know if something is going to show up.I suspect Canada customs is now executing additional scrutiny on China traffic to interdict the smuggling of fentanyl and carfentanil pills and other drug precursor chemicals.

author: technix
author_rank: Super Contributor
timestamp: June 16, 2017, 02:29:22 am
content: Quote from: chickenHeadKnob on June 16, 2017, 01:05:28 amI am not sure about that. Things can get stuck in the customs for whatever reason.

author: technix
author_rank: Super Contributor
timestamp: June 22, 2017, 03:36:04 pm
content: Alright this is a big delivery and it will be VERY costly.

author: Squantor
author_rank: Contributor
timestamp: June 23, 2017, 07:50:56 am
content: Quote from: technix on June 22, 2017, 03:36:04 pmYou pick them up personally at the factory? Have they asked you "what do you use them for?", do they also make other components?Imagine asnwering to them "oh I buy them for people on the internet that have a bit of an obsession in measuring electrical quantities"

author: technix
author_rank: Super Contributor
timestamp: June 23, 2017, 08:55:55 am
content: Quote from: Squantor on June 23, 2017, 07:50:56 amThat is the exact answer I gave him... He is happy though as he is making exports.

author: Vojtech
author_rank: Contributor
timestamp: June 26, 2017, 06:26:48 pm
content: PM sent for:15x 2DW23215x 2DW233Thank You

author: uwezi
author_rank: Unknown
timestamp: July 04, 2017, 09:14:07 pm
content: Quote from: Flinstone on July 02, 2017, 06:31:54 pmYou will find several measurement results on these Zener diodes in the threadhttps://www.eevblog.com/forum/metrology/ultra-low-noise-reference-2dw232-2dw233-2dw23x/and the orders are organized by member Technix and not Zlymex.

author: technix
author_rank: Super Contributor
timestamp: July 15, 2017, 02:22:08 am
content: For the active pending orders, replacement common-cathode parts have arrived.

author: 0.01C
author_rank: Regular Contributor
timestamp: July 23, 2017, 12:39:45 pm
content: I sent some different date code of 2dw to a member for test and comparison , hope he can find out which date code is the best.

author: cellularmitosis
author_rank: Unknown
timestamp: July 25, 2017, 05:08:57 pm
content: OH YEAH!!!

author: IconicPCB
author_rank: Super Contributor
timestamp: July 25, 2017, 11:49:02 pm
content: Technix,Just received a parcel of diodes.Thank You

author: vindoline
author_rank: Unknown
timestamp: July 26, 2017, 03:16:53 am
content: Mine arrived today as well. Thank you Technix! Now I just have to DO SOMETHING with themPS No date codes on my diodes.

author: Muxr
author_rank: Super Contributor
timestamp: July 27, 2017, 03:00:33 am
content: Got mine as well, thanks Technix!

author: technix
author_rank: Super Contributor
timestamp: August 07, 2017, 05:51:04 pm
content: I am closing the current aggregation. New orders are still welcomed.

author: mikeys
author_rank: Contributor
timestamp: August 07, 2017, 06:26:56 pm
content: 20x 2DW232 pleaseUKSending PM

author: Spikee
author_rank: Frequent Contributor
timestamp: August 08, 2017, 04:41:45 pm
content: Are there any in stock at this moment ? I online need a few to play with ... lets say 3. I'm in china btw can also order it on taoboa is there is a genuine supply.

author: technix
author_rank: Super Contributor
timestamp: August 09, 2017, 08:02:21 am
content: Quote from: Spikee on August 08, 2017, 04:41:45 pmI do have a small stock, but not a lot of them. PM me for details of Chinese orders, as local shipping and stock handling is very different.

author: BU508A
author_rank: Super Contributor
timestamp: August 09, 2017, 10:22:41 am
content: Please count me in for the following:Type Name Qty Country Flags2DW232 BU508A 10 Germany PSD2DW233 BU508A 10 Germany PSD2DW234 BU508A 10 Germany PSDPM sent.Thank you!

author: Dave
author_rank: Super Contributor
timestamp: August 09, 2017, 12:23:34 pm
content: I'd also like to join in on the metrology fun!Type Name Qty Country2DW232 Dave 20 Slovenia2DW233 Dave 20 SloveniaEdit: Ignore this post, updated order below.

author: SZA263
author_rank: Contributor
timestamp: August 28, 2017, 06:48:15 am
content: Please add me too. ThanksType Name Qty Country2DW232 SZA263 20 Italy2DW233 SZA263 20 Italy

author: welterde
author_rank: Contributor
timestamp: August 28, 2017, 02:56:03 pm
content: I also want to join the fun!Type Name Qty Country2DW232 welterde 10 Germany2DW233 welterde 10 Germany2DW234 welterde 10 Germany

author: floobydust
author_rank: Super Contributor
timestamp: August 28, 2017, 04:58:25 pm
content: Please add me too. PM sent. ThxType Name Qty Country2DW232 floobydust 10 Canada

author: Dave
author_rank: Super Contributor
timestamp: August 30, 2017, 05:09:16 am
content: I'd like to change my order.I figured that cherry picking good diodes would be easier from a larger batch of same model.Type Name Qty Country2DW232 Dave 50 Slovenia

author: technix
author_rank: Super Contributor
timestamp: September 02, 2017, 05:06:33 pm
content: A new aggregation have been started with a new method of payment.

author: texaspyro
author_rank: Super Contributor
timestamp: September 05, 2017, 12:07:54 am
content: I guess I'll join the party...Please add me too. ThanksType Name Qty Country2DW232 SZA263 20 USA2DW233 SZA263 20 USA

author: technix
author_rank: Super Contributor
timestamp: September 14, 2017, 02:25:39 pm
content: The corrent aggregation is being processed. You can still post your order below to take part in the next aggregation.

author: technix
author_rank: Super Contributor
timestamp: October 08, 2017, 04:40:23 am
content: I am sorting the active orders now, will ship Oct. 9.

author: IconicPCB
author_rank: Super Contributor
timestamp: October 08, 2017, 12:58:42 pm
content: Technix,Does the factory produce any other votlage rating buried zeners? Say for example 8.2V or 9.1V buried zener on its own?

author: technix
author_rank: Super Contributor
timestamp: October 08, 2017, 01:00:53 pm
content: Quote from: IconicPCB on October 08, 2017, 12:58:42 pmI don't think so. At least it is not shown on their catalog they gave me.

author: Kleinstein
author_rank: Super Contributor
timestamp: October 08, 2017, 01:32:14 pm
content: For use as a precision reference, only a very limited voltage range is good: either about 5.5 V used as a zener only or something like 6-6.4 V to be used in combination with an PN junction.Lower voltages would have to much TC and too much differential resistance and would thus need very stable resistors / current source. Higher voltage ones are usually too noisy. The low noise of the 2DW232 might be due to the slightly lower voltage, than otherwise typical for compensated zeners.In theory one might use two zeners and one diode in series to get something like 11 V - but I have not seen that as a single unit.

author: IconicPCB
author_rank: Super Contributor
timestamp: October 08, 2017, 08:21:59 pm
content: Kleinstein,Good information, well understood.Reason behind the question is the temperature coefficient of a single diode, It is marginally too low for my needs.I underline single diode not a combination of zener and forward junction.Technix,Please ask the factory whether they have a slightl;y higher voltage zener diode in buried structure device.

author: Dave
author_rank: Super Contributor
timestamp: October 22, 2017, 12:37:15 am
content: What is the status on the last aggregated order?

author: technix
author_rank: Super Contributor
timestamp: October 22, 2017, 09:41:40 am
content: Quote from: Dave on October 22, 2017, 12:37:15 amPosted. It should arrive some time soon.

author: BU508A
author_rank: Super Contributor
timestamp: October 27, 2017, 12:22:48 pm
content: Mine arrived at 25th of October. Well packaged!Thank you very much technix for all your efforts. Very appreciated.Andreas

author: Dave
author_rank: Super Contributor
timestamp: November 03, 2017, 07:42:34 pm
content: I received the diodes today. Thank you very much, technix!I now just need to wait for the PCBs to arrive and then I can start tinkering around with them.

author: floobydust
author_rank: Super Contributor
timestamp: November 06, 2017, 05:24:11 pm
content: I received the 2DW232's about 4 weeks shipping time. Thanks to technix for this service.I have some from Ali with Seven packaging and date/lot code "15-4", but these have no extra markings.The can looks similar, stamped a bit wonky so I'm not sure what plant made them.

author: SZA263
author_rank: Contributor
timestamp: December 15, 2017, 04:48:00 pm
content: After two months of waiting (usual time for Italian customs) I received my zener too.I will try them soon.Many thanks to technix for its support

author: n8ur
author_rank: Newbie
timestamp: February 18, 2018, 03:13:26 pm
content: Hi Technix -- are you still offering the 2DW23x diode aggregated offers? If so, I'd like to get some.Thanks!John

author: technix
author_rank: Super Contributor
timestamp: February 19, 2018, 01:46:00 pm
content: Quote from: n8ur on February 18, 2018, 03:13:26 pmYes it is still open. Post your order here and DM me your shipping address. I will DM you my PayPal and pricing.

author: andyb
author_rank: Regular Contributor
timestamp: February 19, 2018, 07:09:14 pm
content: Hello I'd like to get a few Zeners to play with2DW233 andyb 20pcs USAMuch thanks! Sent PM

author: Smoof
author_rank: Newbie
timestamp: February 23, 2018, 04:40:34 pm
content: Hi technix,thank you very much for your offer! I'd like to order some to play with as well.Type Name Qty Country2DW234 Smoof 50 GermanyPM sent, thank you again, much appreciated!Cheers,Smoof

author: Octane
author_rank: Regular Contributor
timestamp: May 30, 2018, 03:41:49 am
content: Hi technix,If the group order is still open, I would like to get in on it with the following order:Type Name Qty Country2DW232 Octane 20 USA2DW233 Octane 10 USA2DW234 Octane 10 USAHow do I pay you? Do I PM you my address?Thanks,Octane

author: technix
author_rank: Super Contributor
timestamp: May 30, 2018, 07:01:49 am
content: Quote from: Octane on May 30, 2018, 03:41:49 amThe aggregation is open, but this order might have to wait a while since there is nobody in the waiting list. You should PM me your address and I would replay the PM with my payment information. I can accept bank transfer and PayPal.

author: Octane
author_rank: Regular Contributor
timestamp: May 30, 2018, 12:33:16 pm
content: Hi technix,Im not in a hurry! Thanks for making this possible!If not enough people aggregate, no big deal either.PM will follow today.Thanks,Michael

author: ddanaci
author_rank: Newbie
timestamp: May 31, 2018, 12:52:26 pm
content: Hi Technix,May I please add the following order:Type Name Qty Country2DW232 ddanaci 30 AustraliaThank you,David