Author Topic: Group Buy of 2DW233 ultra low noise zener reference  (Read 49388 times)

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Offline VintageNutTopic starter

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Group Buy of 2DW233 ultra low noise zener reference
« on: October 27, 2016, 08:23:02 am »
Zlymex was kind enough to purchase and send 430 pcs of a 2DW233 with what looks like a 4-14 date code from his picture on the 2DW original thread.

This will be a cooperative effort. Everybody who wants to receive some of these please follow these simple
instructions.

1. Everybody who is not in the USA, please add your country beside your name on the list. Just copy the list, paste the list into a new post on this thread, and add your country beside your name.

2. If you are not on the list, and you want to be on the list, copy the list, add your name and country to the bottom of the list and post the amended list.

Housekeeping items

1. You will need to pay for United States Postal Service (USPS) shipping of the parts to your location. I can accept Paypal. If you cannot send payment for the shipping then you will have to find another way to purchase these for yourself. I have shipped stuff to just about every country in the world, so , chances are that USPS can get these parts to you no matter where you are. After I have a representative package to ship, I can post the price of shipping to various countries.

2. If we end up with 150 people on this list then everybody gets 2.8667 pieces. That is just the arithmetic of the situation. Lets see how this list develops and we can discuss it. My personal opinion is that 10 pcs is the minimum that would be interesting. That means we can accept up to 43 people on this list.

3. When it is time to ship, I will send you a PM on this site with an invoice and instructions for sending payment for shipping.

4. I have a day job. It takes me out of town on travel sometimes. There will be some days that I will not be able to post on this thread and will not have access to PMs etc.




Europe:

Theboel
eliocor
pmcouto
Squantor
pelule
branadic
hammy
Nuno_pt
Cerebus
manganin
2N3055
MosherIV
janode
Alex Nikitin
babysitter
plesa



USA:
evb149
MatteoX
orin
VintageNut
Galaxyrise



best regards,

VintageNut
working instruments :Keithley 260,261,2750,7708, 2000 (calibrated), 2015, 236, 237, 238, 147, 220,  Rigol DG1032  PAR Model 128 Lock-In amplifier, Fluke 332A, Gen Res 4107 KVD, 4107D KVD, Fluke 731B X2 (calibrated), Fluke 5450A (calibrated)
 
The following users thanked this post: BravoV, edavid, evb149, julian1, 2N3055, chriswebb, SvanGool

Offline BravoV

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #1 on: October 27, 2016, 08:51:21 am »
Europe:

Theboel
eliocor
pmcouto
Squantor
pelule
branadic
hammy
Nuno_pt
Cerebus
manganin
2N3055
MosherIV
janode
Alex Nikitin
babysitter
plesa



USA:
evb149
MatteoX
orin
VintageNut
Galaxyrise


SE Asia:
BravoV (min.20, paypal)



VintageNut , check PM please.
« Last Edit: October 27, 2016, 09:04:33 am by BravoV »
 

Offline 2N3055

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #2 on: October 27, 2016, 08:54:37 am »
I just want to thank so much to Zlymex  for helping us, that was awesome!! Also I thank you for doing this, it means a lot!!
You guys are great !

Here is my info:

Europe:

Theboel
eliocor
pmcouto
Squantor
pelule
branadic
hammy
Nuno_pt
Cerebus
manganin
2N3055 - Croatia -Paypal - 20 Pcs  (if possible, otherwise 10 will do)
MosherIV
janode
Alex Nikitin
babysitter
plesa



USA:
evb149
MatteoX
orin
VintageNut
Galaxyrise


SE Asia:
BravoV
 

Online Alex Nikitin

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #3 on: October 27, 2016, 09:02:39 am »
Thank you for your help, here it goes:

Cheers

Alex

Europe:

Theboel
eliocor
pmcouto
Squantor
pelule
branadic
hammy
Nuno_pt
Cerebus
manganin
2N3055 - Croatia -Paypal - 20 Pcs  (if possible, otherwise 10 will do)
MosherIV
janode
Alex Nikitin - United Kingdom, PayPal OK, 30
babysitter
plesa



USA:
evb149
MatteoX
orin
VintageNut
Galaxyrise


SE Asia:
BravoV
 

Offline MosherIV

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #4 on: October 27, 2016, 09:24:50 am »
Thanks to Zlymex and Vintagenut for organising this !
MosherIV

Europe:

Theboel
eliocor
pmcouto
Squantor
pelule
branadic
hammy
Nuno_pt
Cerebus
manganin
2N3055 - Croatia -Paypal - 20 Pcs  (if possible, otherwise 10 will do)
MosherIV - United Kindom, 3 (but if we doing 10 min - OK with 10)
janode
Alex Nikitin - United Kingdom, PayPal OK, 30
babysitter
plesa



USA:
evb149
MatteoX
orin
VintageNut
Galaxyrise


SE Asia:
BravoV
 

Offline Nuno_pt

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #5 on: October 27, 2016, 09:39:30 am »
Europe:

Theboel
eliocor
pmcouto
Squantor
pelule
branadic
hammy
Nuno_pt - Portugal, Paypal OK, 30
Cerebus
manganin
2N3055 - Croatia -Paypal - 20 Pcs  (if possible, otherwise 10 will do)
MosherIV - United Kindom, 3 (but if we doing 10 min - OK with 10)
janode
Alex Nikitin - United Kingdom, PayPal OK, 30
babysitter
plesa



USA:
evb149
MatteoX
orin
VintageNut
Galaxyrise


SE Asia:
BravoV
Nuno
CT2IRY
 

Offline riyadh144

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #6 on: October 27, 2016, 09:43:27 am »
Europe:

Theboel
eliocor
pmcouto
Squantor
pelule
branadic
hammy
Nuno_pt - Portugal, Paypal OK, 30
Cerebus
manganin
2N3055 - Croatia -Paypal - 20 Pcs  (if possible, otherwise 10 will do)
MosherIV - United Kindom, 3 (but if we doing 10 min - OK with 10)
janode
Alex Nikitin - United Kingdom, PayPal OK, 30
babysitter
plesa



USA:
evb149
MatteoX
orin
VintageNut
Galaxyrise
Riyadh


SE Asia:
BravoV
 

Offline chuckb

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #7 on: October 27, 2016, 10:42:12 am »
Europe:

Theboel
eliocor
pmcouto
Squantor
pelule
branadic
hammy
Nuno_pt - Portugal, Paypal OK, 30
Cerebus
manganin
2N3055 - Croatia -Paypal - 20 Pcs  (if possible, otherwise 10 will do)
MosherIV - United Kindom, 3 (but if we doing 10 min - OK with 10)
janode
Alex Nikitin - United Kingdom, PayPal OK, 30
babysitter
plesa



USA:
evb149
MatteoX
orin
VintageNut
Galaxyrise
Riyadh
chuckb

SE Asia:
BravoV
 

Offline VK5RC

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #8 on: October 27, 2016, 11:02:37 am »
Thanks

Europe:

Theboel
eliocor
pmcouto
Squantor
pelule
branadic
hammy
Nuno_pt - Portugal, Paypal OK, 30
Cerebus
manganin
2N3055 - Croatia -Paypal - 20 Pcs  (if possible, otherwise 10 will do)
MosherIV - United Kindom, 3 (but if we doing 10 min - OK with 10)
janode
Alex Nikitin - United Kingdom, PayPal OK, 30
babysitter
plesa



USA:
evb149
MatteoX
orin
VintageNut
Galaxyrise
Riyadh
chuckb

SE Asia:
BravoV

Australia:
VK5RC
Whoah! Watch where that landed we might need it later.
 

Offline BravoV

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #9 on: October 27, 2016, 11:05:18 am »
Europe:

Theboel
eliocor
pmcouto
Squantor
pelule
branadic
hammy
Nuno_pt - Portugal, Paypal OK, 30
Cerebus
manganin
2N3055 - Croatia -Paypal - 20 Pcs  (if possible, otherwise 10 will do)
MosherIV - United Kindom, 3 (but if we doing 10 min - OK with 10)
janode
Alex Nikitin - United Kingdom, PayPal OK, 30
babysitter
plesa



USA:
evb149
MatteoX
orin
VintageNut
Galaxyrise
Riyadh
chuckb

Asia:
BravoV , paypal, qty : 20 pcs ( or 30 if possible)

Australia:
VK5RC


PS : Update of number of pcs wanted

Offline Squantor

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #10 on: October 27, 2016, 11:14:32 am »
Europe:

Theboel
eliocor
pmcouto
Squantor - The Netherlands, Paypal OK, 30 pieces if possible
pelule
branadic
hammy
Nuno_pt - Portugal, Paypal OK, 30
Cerebus
manganin
2N3055 - Croatia -Paypal - 20 Pcs  (if possible, otherwise 10 will do)
MosherIV - United Kindom, 3 (but if we doing 10 min - OK with 10)
janode
Alex Nikitin - United Kingdom, PayPal OK, 30
babysitter
plesa



USA:
evb149
MatteoX
orin
VintageNut
Galaxyrise
Riyadh
chuckb

Asia:
BravoV , paypal, qty : 20 pcs ( or 30 if possible)

Australia:
VK5RC
 

Offline TiN

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #11 on: October 27, 2016, 12:03:40 pm »
Perhaps I could design a board for it, similar to LTZ one?
But I'm not familiar with the circuit for these.
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Offline pmcouto

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #12 on: October 27, 2016, 12:15:45 pm »
Europe:

Theboel
eliocor
pmcouto - Portugal, Paypal OK, 30
Squantor - The Netherlands, Paypal OK, 30 pieces if possible
pelule
branadic
hammy
Nuno_pt - Portugal, Paypal OK, 30
Cerebus
manganin
2N3055 - Croatia -Paypal - 20 Pcs  (if possible, otherwise 10 will do)
MosherIV - United Kindom, 3 (but if we doing 10 min - OK with 10)
janode
Alex Nikitin - United Kingdom, PayPal OK, 30
babysitter
plesa



USA:
evb149
MatteoX
orin
VintageNut
Galaxyrise
Riyadh
chuckb

Asia:
BravoV , paypal, qty : 20 pcs ( or 30 if possible)

Australia:
VK5RC
 

Offline VintageNutTopic starter

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #13 on: October 27, 2016, 12:37:22 pm »
Perhaps I could design a board for it, similar to LTZ one?
But I'm not familiar with the circuit for these.

Tin

Your designs are awesome. I would welcome a board that you design. The zener is nominally 6.25VDC. You have to tweak each board for the zero TC of the individual part.

An ovenized board like what is in the DMM7510 would be great. Set the temperature inside the ovenized module for between 30 and 35 C and it should be stable in every home lab situation.
working instruments :Keithley 260,261,2750,7708, 2000 (calibrated), 2015, 236, 237, 238, 147, 220,  Rigol DG1032  PAR Model 128 Lock-In amplifier, Fluke 332A, Gen Res 4107 KVD, 4107D KVD, Fluke 731B X2 (calibrated), Fluke 5450A (calibrated)
 

Offline 2N3055

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #14 on: October 27, 2016, 12:45:30 pm »
From tc diagram inflection point seems to be between 50-60 C..
30-35 seems low,  that is room temperature in sumer .. It gets hot here..
 

Offline VintageNutTopic starter

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #15 on: October 27, 2016, 01:13:03 pm »
From tc diagram inflection point seems to be between 50-60 C..
30-35 seems low,  that is room temperature in sumer .. It gets hot here..

I think that the current in the Zener will affect the zero TC temperature. There may be a current that allows a lower zero TC temperature.

In any event, having an oven that can be set by the user will allow different oven temperatures in different parts of the world. Even if the 30 or 35 or 40 C oven is not at zero TC of the zener, if the oven is more stable than the home lab environment, then the reference with the oven is better than no oven at all.

Just my opinion. In my home, my Fluke 731B that I monitor changes about 1 ppm for every 2 degrees F of change in my home temperature. My home temperature can easily vary +/- 5 degrees from week to week. I turn off the HVAC when it is nice outside and open the windows.

I have seen my 731B vary 5ppm over the course of a day where it is hot in the afternoon and cold overnight. Adding an oven to the 731B would make it a much more useful reference standard.
working instruments :Keithley 260,261,2750,7708, 2000 (calibrated), 2015, 236, 237, 238, 147, 220,  Rigol DG1032  PAR Model 128 Lock-In amplifier, Fluke 332A, Gen Res 4107 KVD, 4107D KVD, Fluke 731B X2 (calibrated), Fluke 5450A (calibrated)
 

Offline Nuno_pt

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #16 on: October 27, 2016, 01:26:53 pm »
I agree that we could use some boards like the LTZ from TiN.

The oven would be good for those that don't have HVAC in the workshop or lab, in my case the temps in the workshop vary from mid 20's Cº in fall/winter to mid 30's Cº in summer, still waiting for the BME280 sensor to start tracking the change of temp in the workshop.

Now just need some GPIB cables and GPIB-USB from China.
« Last Edit: October 27, 2016, 01:32:13 pm by Nuno_pt »
Nuno
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Offline hammy

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #17 on: October 27, 2016, 02:11:29 pm »
Europe:

Theboel
eliocor
pmcouto - Portugal, Paypal OK, 30
Squantor - The Netherlands, Paypal OK, 30 pieces if possible
pelule
branadic
hammy - Germany, Paypal OK, 30 pieces
Nuno_pt - Portugal, Paypal OK, 30
Cerebus
manganin
2N3055 - Croatia -Paypal - 20 Pcs  (if possible, otherwise 10 will do)
MosherIV - United Kindom, 3 (but if we doing 10 min - OK with 10)
janode
Alex Nikitin - United Kingdom, PayPal OK, 30
babysitter
plesa

USA:
evb149
MatteoX
orin
VintageNut
Galaxyrise
Riyadh
chuckb

Asia:
BravoV , paypal, qty : 20 pcs ( or 30 if possible)

Australia:
VK5RC
 

Offline bingo600

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #18 on: October 27, 2016, 02:49:46 pm »
Europe:

Theboel
eliocor
pmcouto - Portugal, Paypal OK, 30
Squantor - The Netherlands, Paypal OK, 30 pieces if possible
pelule
branadic
hammy - Germany, Paypal OK, 30 pieces
Nuno_pt - Portugal, Paypal OK, 30
Cerebus
manganin
2N3055 - Croatia -Paypal - 20 Pcs  (if possible, otherwise 10 will do)
MosherIV - United Kindom, 3 (but if we doing 10 min - OK with 10)
janode
Alex Nikitin - United Kingdom, PayPal OK, 30
babysitter
plesa
bingo600 - Denmark -Paypal OK - 20 Pcs  (if possible, otherwise 10 will do)

USA:
evb149
MatteoX
orin
VintageNut
Galaxyrise
Riyadh
chuckb

Asia:
BravoV , paypal, qty : 20 pcs ( or 30 if possible)

Australia:
VK5RC
 

Offline VintageNutTopic starter

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #19 on: October 27, 2016, 03:16:59 pm »
Hello Tin

Attached is a design by Warren S of the VoltNuts email list. I traded some emails with him and he shared the schematic. His posting on the VoltNuts list is pasted below the schematic.



For the Extreme (or cheap) Volt Nut, There is another choice.
Attached is the circuit of a 0.1 PPM, 10 volt transfer standard.
It has ONLY ONE critical part that limits its accuracy and stability.
Everything else can be made to have so little effect as to be insignificant or else can
be trimmed and calibrated out without using a precision voltage source using a method
similar to what the daily auto cal in the HP3458 does. It measures it's own internal 6+V
reference.
Every year or more, best to record the value of the nominal 6.2 volts, to measurement the
ageing rate, by using a known external 10 volt standard.
To do that, an accurate external way is needed to find the exact ratio of the 6.2 volts
to the external 10 volt standard.
This can be done by using a high resolution Linear DMM (aka HP3458A) OR a Kelvin-Varley
divider (aka fluke 720 ) and null meter (aka Fluke 845).
Lets assume if one wants to do 0.1 PPM things, then they have the equipment and skill
needed to measure a 10v to 6v ratio to 0.1 PPM.
After that ratio is known and recorded the units internal 10 volts can then be set to
that same ratio without further need of the external 10V standard.
The main advantage of all this extra trouble is low cost accuracy and stability.
There are no critical or expensive resistor needed or anything else critical, because all
the TC and long term drift are canceled out whenever a manual trim is done using an
external ratio device to check its own 10 V against it's own 6.2 volts.
Nothing very special is needed to build this beside care and time.
To get the best performance, It does take a lot of Nut-time to match and select things.
Total parts cost with a well supplied analog junk box (or EBay) can be under $10.
Any good 6V type reference device could be used.
I'm using a well aged and selected 1n825 because I have a lot of history with them and
they work good without an oven.
I have not done any mailing test on these parts but they can be Zero TCed so that they do
not change 0.1PPM over normal room temperature
and they show no change when powered down for short periods of time and tend to return to
their original value when hit with a heat gun and cold stray, so it makes a good part to
start experimenting with.
ws
« Last Edit: October 27, 2016, 03:21:04 pm by VintageNut »
working instruments :Keithley 260,261,2750,7708, 2000 (calibrated), 2015, 236, 237, 238, 147, 220,  Rigol DG1032  PAR Model 128 Lock-In amplifier, Fluke 332A, Gen Res 4107 KVD, 4107D KVD, Fluke 731B X2 (calibrated), Fluke 5450A (calibrated)
 
The following users thanked this post: 2N3055

Offline TiN

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #20 on: October 27, 2016, 03:23:20 pm »
I can't see the schematics though, perhaps you can attach it? I'll need PDF or so to redraw it in my CAD.
Perhaps include me into list too then, 10pcs Taipei, Asia :) I'd make a board , perhaps with room for 10K resistor, and call it 3458A-NutKit :D
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Offline Nuno_pt

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #21 on: October 27, 2016, 03:44:21 pm »
TiN that idea of make everything in one board with this schematic is good, since we can send it as na Traveler Standard and be adjust by some guys with 3458, 720, and 845, also the space for 10k is good.

That schematic would be good also for a new LTZ1k board revision, also with the place for the 10k on board.

Maybe a new chalange this two boards Illya. :-)

TiN in attach is the schematic that VoltageNut posted.
« Last Edit: October 27, 2016, 03:59:36 pm by Nuno_pt »
Nuno
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The following users thanked this post: TiN

Offline gilbenl

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #22 on: October 27, 2016, 04:22:08 pm »
Europe:

Theboel
eliocor
pmcouto - Portugal, Paypal OK, 30
Squantor - The Netherlands, Paypal OK, 30 pieces if possible
pelule
branadic
hammy - Germany, Paypal OK, 30 pieces
Nuno_pt - Portugal, Paypal OK, 30
Cerebus
manganin
2N3055 - Croatia -Paypal - 20 Pcs  (if possible, otherwise 10 will do)
MosherIV - United Kindom, 3 (but if we doing 10 min - OK with 10)
janode
Alex Nikitin - United Kingdom, PayPal OK, 30
babysitter
plesa
bingo600 - Denmark -Paypal OK - 20 Pcs  (if possible, otherwise 10 will do)

USA:
gilbenl- Paypal OK, 20 pcs
evb149
MatteoX
orin
VintageNut
Galaxyrise
Riyadh
chuckb

Asia:
BravoV , paypal, qty : 20 pcs ( or 30 if possible)

Australia:
VK5RC
What doesn't kill you, probably hurts a lot.
 

Offline edavid

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #23 on: October 27, 2016, 05:04:00 pm »
Europe:

Theboel
eliocor
pmcouto - Portugal, Paypal OK, 30
Squantor - The Netherlands, Paypal OK, 30 pieces if possible
pelule
branadic
hammy - Germany, Paypal OK, 30 pieces
Nuno_pt - Portugal, Paypal OK, 30
Cerebus
manganin
2N3055 - Croatia -Paypal - 20 Pcs  (if possible, otherwise 10 will do)
MosherIV - United Kindom, 3 (but if we doing 10 min - OK with 10)
janode
Alex Nikitin - United Kingdom, PayPal OK, 30
babysitter
plesa
bingo600 - Denmark -Paypal OK - 20 Pcs  (if possible, otherwise 10 will do)

USA:
gilbenl- Paypal OK, 20 pcs
evb149
MatteoX
orin
VintageNut
Galaxyrise
Riyadh
chuckb
edavid

Asia:
BravoV , paypal, qty : 20 pcs ( or 30 if possible)

Australia:
VK5RC
 

Offline Gyro

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Re: Group Buy of 2DW233 ultra low noise zener reference
« Reply #24 on: October 27, 2016, 05:32:24 pm »
Thanks to you both!


Europe:

Theboel
eliocor
pmcouto - Portugal, Paypal OK, 30
Squantor - The Netherlands, Paypal OK, 30 pieces if possible
pelule
branadic
hammy - Germany, Paypal OK, 30 pieces
Nuno_pt - Portugal, Paypal OK, 30
Cerebus
manganin
2N3055 - Croatia -Paypal - 20 Pcs  (if possible, otherwise 10 will do)
MosherIV - United Kindom, 3 (but if we doing 10 min - OK with 10)
janode
Alex Nikitin - United Kingdom, PayPal OK, 30
babysitter
plesa
bingo600 - Denmark -Paypal OK - 20 Pcs  (if possible, otherwise 10 will do)
Gyro - United Kingdom

USA:
gilbenl- Paypal OK, 20 pcs
evb149
MatteoX
orin
VintageNut
Galaxyrise
Riyadh
chuckb
edavid

Asia:
BravoV , paypal, qty : 20 pcs ( or 30 if possible)

Australia:
VK5RC
Best Regards, Chris
 


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