Group buy: LTZ1000 precision resistor set

[MiDi]

Meeting point to organize group buy of precision resistor sets for LTZ1000 circuit.
Mainly for 10V pcb (branadic / Dr. Frank), but not limited to that.

I think group buy would only make sense when a couple of people want small quantity of same type (to save shipping cost and get volume cut in price - hopefully).

I am not familiar with precision resistors, so I do not really know where to go:
- Vishay Z/VH/VHP and equivalent as dividers (incredible long lead time?)
- Edwin G. Pettis Ultrohm Plus (seem to have a good price point) - specs, thermal shock resistance
- Rhopoint Econistors
- ?

[modified quote from pm]

I can appreciate the problems with shipping to various countries especially in the EU, for customers outside of the USA, the average 1st Class shipping charge is about $14,90, domestically it is about $4.15 for 1st Class.

If your group does a ‘bulk’ purchase, I will extend the discounts to everyone based on the total of each line item ordered, the minimum quantity for discount is 10 and that is 15%.  It would help if everyone contacts me directly through my e-mail (pettiseng@q.com) rather than the blog’s system.

I will leave it up to you and the group to determine which [e.g.] two weeks they want to order in; of course I’ll need to know the dates.

1.    Everyone will need to identify to me that they are part of the group purchase.
2.    I will determine the discounts based on the final tally of values ordered.
3.    I will notify everyone of the final pricing and individual shipping charges shortly after the [e.g.] 2-week period ends.
4.    Most customers use PayPal, my account is: pettiseng@q.com
5.   Production time will depend on the final quantities; I will apprise customers of the expected time.

Current base pricing for type 802 resistors, 1-9 is:

120R0   $7.19
1K      $6.65
12K      $7.72 [~45°C heater set point, only for NON A version at roomtemp]
12.5K   $7.85 [~52°C heater set point]
13K      $8.03 [~60°C heater set point]
70K      $9.07

±0.1%, ±3 PPM/°C maximum, 0.250” D x 0.375” L

I do not recommend using anything less than 12.5K for the LTZ circuit, you will not achieve any significant decrease in aging characteristics and it is better to have more than a few degrees overhead for temperature control.  It is the internal temperature of the LTZ that you are regulating, not the external environmental temperature; the LTZ is a power in – power out device.

Technically, it would have been best if the temperature ratio pair had been put next to each other on the PCB so they could be better thermally coupled but since that isn’t possible, thermal air drafts will need to be blocked to minimize differences.  NOTE: do not encase the LTZ to the point of no thermal exchange with the air as this will cause the LTZ to exceed the internal regulation loop and it will lose thermal regulation.  This is a known characteristic; you need to block air drafts around the leads, both top and bottom but not the body.  Do not use any hydroscopic material inside the LTZ box, you don’t need anything that absorbs humidity and holds it.  Of course you can also include a package of silicate to help with that.  I am not saying that any particular components are humidity sensitive; it just isn’t a good idea to have humidity building up.

A voltage booster circuit is much more complicated than the LTZ board; many things beyond the resistors contribute to the output voltage.  Thermals of course, the op-amp, the op-amp amplifies thermals and TCRs, thermal coupling between the resistors, and noise to name a few things that will affect the output.  While I have made resistors for this purpose that has exceptionally low tracking TCR, it took exceptional effort to achieve in the short term.  Tracking TCRs down to 0.1 PPM/°C were achieved but this was for an industrial customer where the effort and cost were justified, the customer actually did the final processing because he had the equipment to do it.  He also went to some extreme to minimize thermals.

For the average user and some reasonable processing, you could expect something around ≤0.5 PPM/°C or so, if the design of the booster circuit is done correctly and carefully you could achieve very good thermal equilibrium thereby minimizing further the TCR of the output.  One possible way is to use a small oven to stabilize the booster circuits so that temperature becomes a minor problem.  The voltage booster circuit could easily end up costing more than the LTZ circuits.  Look at the Fluke 732A/B to see the lengths they went to to stabilize the outputs, quite complex.  The LTZ board does not need this sort of effort because it is basically internally heat regulated and is not aided by external ovenizing.

Some may point to the LTC5400 chip for very low tracking TCR, to some degree that is quite accurate but the type of resistors inside have wide tolerances from chip to chip, significant noise and 1/f noise as well, PWW resistors have neither.  So there is a tradeoff for getting low TCR with higher noise and you also have more trimming to deal with because of tolerance and limited values.

You are correct in that there will be a power imbalance between the ratio resistors in the booster circuit (just like the heater circuit in the LTZ), just having resistors with the same TCR will not get rid of that problem, that is where some of the thermal problems come from, they require very good thermal coupling between them to start with, such as copper tape wrapped around them.  If you decide to trim the output, there will be additional resistors to contend with including a trimmer, this should be a Bourn 3290 for best stability (yes you have to shop around, many places are asking a high price for it but you can find them at lower pricing if you look hard enough, the Vishay trimmers are inferior no matter what the specs claim).  If you can tolerate a more fixed output then you can eliminate the hassle of trimming, the drawback is you will need to calculate the booster ratio resistors values to a closer tolerance (no you really don’t have to go to ±10PPM).  Your resistor values will depend on your circuit design and what you want at the output so I can’t really advise on specific values, just how to implement them.

You do not need to have exactly 10.0000000Vs at the output to calibrate with, anything fairly close will do as long as the value is known, whether it is a manual or automatic adjustment calibration.  The stability is really more important which brings me to another topic, long term drift.  If you haven’t read the post I put in metrology section for definitions, it is a good place to start.  All freshly made resistors have drift which tends to decrease over time naturally, depending on the user’s patience, one can either wait some months for the drift to settle down or purchase the so-called PMO or enhanced processed resistor which takes some of the initial drift out of the resistors.  On average, again depending on circumstances, resistors will settle down to fairly low drift after about a year (it might be more or less) to low single digit drift without PMO, depending on the enhanced process, it could remove the lion’s share of the initial drift to possibly single digit drift per year.  Note that your LTZ is going to take at least that long or longer to really settle down to its lower drift rate per year.  Precision takes time and in many cases it cannot be rushed as rushing can have its own long term consequences.

For the two resistors [for 10V boost] you mentioned, I would suggest ±0.01% tolerance:

4.8K      $10.04
12K      $10.13

Ultrohm Plus
125 Vista Grande Dr.
Grand Junction, CO 81507-1427
970-242-4929
pettiseng@q.com

[BradC]

I would be interested in any of those. I have already contacted Edwin about some sets in addition to some other special resistors I need but I've struggled to figure out how to get a set of Vishay metal foils. Can't seem to find an economical or easy way to get them from Australia.

[Sprock]

Hi

sorry no experience too.
For hobby use i tend to Edwin´s resistors but will also
accept others. Majority will rule.   

mfg
Sprock

[GregDunn]

This company makes precision resistors and has a fairly short lead time for kits:

http://www.precisionresistor.com/MC-7-Calibrator.html

[RandallMcRee]

I vote for Edwin's resistors.

Have measured many s102k vishay resistors and most are not "typical" they have more tempco than expected. The VHP series are WAY pricey and have those very long lead times.

For other off-the-shelf I have good experience with Susumu RG series 2ppm, they all were close to spec. These are only available in SMD style so would either need another pcb or an adapter. Plus it would be a custom order for the non-traditional values.

So, in my limited experience, Edwin is the best bet.

[GregDunn]

I'm afraid I'm going to have to bow out of this group buy; at the moment, I won't be able to get the board or the reference chip, so it's moot.  Sorry.   

[Macbeth]

I vote for Edwin's resistors.

Have measured many s102k vishay resistors and most are not "typical" they have more tempco than expected. The VHP series are WAY pricey and have those very long lead times.

For other off-the-shelf I have good experience with Susumu RG series 2ppm, they all were close to spec. These are only available in SMD style so would either need another pcb or an adapter. Plus it would be a custom order for the non-traditional values.

So, in my limited experience, Edwin is the best bet.

If you are in the USA then there is no need for a group buy. I think MiDi is based in Germany, the EU - so every single shipment of a handful of Edwins resistors are subjected to extreme "Let me see your paperz" at the Merkel border, potentially held up for months, then finally released having had massive surcharges, duties and taxes stamped on them.

A group buy with a destination outside of Herr Merkels border zone, like Switzerland, could be advantageous when EU cross border shipping no longer attracts the UK HMRC or German Customs Gestapo.

But I think MiDi is based in Germany and so is really the worst EU member to arrange such a transaction. Even Dave refused to ship his DMM's to Germany.

For some reason we don't have this with stuff imported from China. As a Brit I look forward to Brexit so we can drop this insane EU shit and import stuff as freely from the USA as we get with China.

[MiDi]

If you are in the USA then there is no need for a group buy. I think MiDi is based in Germany, the EU - so every single shipment of a handful of Edwins resistors are subjected to extreme "Let me see your paperz" at the Merkel border, potentially held up for months, then finally released having had massive surcharges, duties and taxes stamped on them.

A group buy with a destination outside of Herr Merkels border zone, like Switzerland, could be advantageous when EU cross border shipping no longer attracts the UK HMRC or German Customs Gestapo.

This is advised to be a meeting point only.

You guessed right, I did not fake my country with Frau Merkel as the Chancellorette 

I have no experience with customs so far (luckily), but afaik there are no customs for resistors into EU if declared correctly (not sure if same applies for electrical measurement equipment).
But afaik there is a tax applied (for imports outside EU with >= 22Eur (~25USD) value incl. shipping 19%VAT for germany), so yes, it would not make much sense to import to EU and then send them around the world outside EU.

[BradC]

Right, in for a penny, in for a pound. I've just ordered 3 sets of Ultrohm Plus PWW, 2 sets of SFERNICE foils from E-bay and a set of 3 KX boards from OSHPark to go with the boards branadic is producing. If I'm building one, I might as well build 5 or 6 right?

The SFERNICE foils are not particularly an optimum set with the values being : 123R / 965R / 12K4 / 68K1 so the set temp will be somewhere around that provided by a 12K85/1K divider. They are also only 5ppm, so we'll see. A start to experiment with anyway. They were about $40 / set. The PWW were about $65 a set including shipping (our exchange rate is horrid right now) but at least they're the right values and reputedly far more stable.

I wouldn't mind spending some real money on a (single) set of hermetic Vishays including a 12.5K/1K divider if someone was going to organise a group buy though.

The LTZ1000ACH at Digikey is backordered until November, so I'll be waiting a while until those land. So far I've put a few bucks over the counter, so there's some incentive to make this more than a pile of parts sitting in a box in the corner

[BradC]

Has anyone done a laymans writeup of the 5 critical resistors in an LTZ1000 circuit and potential effects of deviating from the datasheet/recommended values?

[Macbeth]

Has anyone done a laymans writeup of the 5 critical resistors in an LTZ1000 circuit and potential effects of deviating from the datasheet/recommended values?

Have you read this thread?

https://www.eevblog.com/forum/metrology/resistor-set-for-ltz1000-positive-standard-7v-circuit/

Essentially it's R4/R5 (the 12-13:1 divider) and then R2 (one of the "70K" pair) that are most important.

Apparently the Polish ebay surplus SFERNICE resistors are for Space Applications, ESA 4001/011. http://www.vishaypg.com/docs/63132/rckhr.pdf - I wonder if Prof. Colin Pillinger relied on them for Beagle 2? 

[BradC]

Has anyone done a laymans writeup of the 5 critical resistors in an LTZ1000 circuit and potential effects of deviating from the datasheet/recommended values?

Have you read this thread?

https://www.eevblog.com/forum/metrology/resistor-set-for-ltz1000-positive-standard-7v-circuit/

Essentially it's R4/R5 (the 12-13:1 divider) and then R2 (one of the "70K" pair) that are most important.

Apparently the Polish ebay surplus SFERNICE resistors are for Space Applications, ESA 4001/011. http://www.vishaypg.com/docs/63132/rckhr.pdf - I wonder if Prof. Colin Pillinger relied on them for Beagle 2? 

Thanks, I had read that thread but forgotten completely about it. when looking for information on the LTZ in threads, there is an awful lot of chaff to sort through to get to the wheat. Much appreciated.

[Edwin G. Pettis]

Since I've shipped into a number of EU countries.....on the whole, yes the German customs tends to be the most difficult to get packages through, it also depends to some degree on which customs in which city it goes through, some are much more difficult than others.  I'm told there are fees on top of fees and the ever present VAT.  The dollar value for no significant fees is about $20, that is meant to make sure very little comes into the EU without being nailed and makes it more difficult to fudge on the value a lot.  They are also very suspicious of too many samples or of what looks like very low pricing, that may or may not trigger a customs battle.  I do not know of any customs free duty on PWW resistors in any EU country, if there is none of my customers has mentioned it.  You might be able to get away with shaving some of the actual costs off of the customs paperwork for reduced fees/taxes but it can't be excessive.

Each country tends to be different in how they handle customs, there doesn't appear to be any universal rules being applied outside of perhaps the VAT.  I would presume once the resistors are 'inside' the EU, there would be no further problems/charges/fees on distributing them to other countries outside of postage.  It would only be a matter of checking around with EEVblog members to find the lowest cost entry country.

I also give pretty good quantity discounts......end of ad.

[Andreas]

I'm told there are fees on top of fees and the ever present VAT. 

Hello,

but shurely not by the customs.
Maybe if you send it by a parcel service they call for a handling fee for the customs.

The normal customs process (sending by USPS/Deutsche Post) up to 2kg in a jiffy bag is relative easy.
The package after import goes directly to the local customs store.
After around one week you get a letter that you have to pick up your package at the local customs.

You should have the "Zolltarifnummer" (TARIC) or HTSUS number at hand so that they can calculate correctly the duty rate
(which is 0% for resistors below 20W at the moment).

http://ec.europa.eu/taxation_customs/dds2/taric/measures.jsp?Lang=de&SimDate=20181001&Area=US&MeasType=&StartPub=&EndPub=&MeasText=&GoodsText=&op=&Taric=8533210000&search_text=goods&textSearch=&LangDescr=de&OrderNum=&Regulation=&measStartDat=&measEndDat=

HTSUS: 8533.21.0080
Description: Electrical fixed resistors, other than composition or film type carbon resistors, for a power handling capacity not exceeding 20 W
MFN Duty Rate: Free

Of course you have to pay the VAT (Einfuhrumsatzsteuer) which is 19% at the moment in Germany. (So mostly lower than in other european countries).
So you need a invoice and the paypal/paying receipt.

And there is a speciality if you import: Customs has a own (monthly fixed) exchange rate when importing things so the 19% are not exact 19%
(ok this may appear as fee on top of a fee).
http://www.zoll.de/SiteGlobals/Forms/KursSuche/KurseSuche_Formular_Initial.html;jsessionid=1D3765BD6DA32B62D74B2C5DE084508B.live4411?nn=298534

Disclaimer:
Above are experiences on 2 small orders of around 5 LTZ (7V) resistor sets each.
If ordering large quantities it might be necessary to have a customs EORI-number.

With best regards

Andreas

[MiDi]

Has anyone done a laymans writeup of the 5 critical resistors in an LTZ1000 circuit and potential effects of deviating from the datasheet/recommended values?

Cellularmitosis has collected several data from users.
The 12k/1k goes for heater set point of ~45°C.

[Edwin G. Pettis]

!2k is cutting it a bit close unless you are in a cooler controlled environment such as a lab at 23°C-25°C or located in a cooler country.  I do not recommend using less than 12.5K as a minimum and I regularly recommend 13K as the universal value to assure correct operation of the LTZ.  Remember the LTZ is a power in, power out device and the real temperature you need to pay attention to is the internal temperature of the LTZ, that is where the regulation of temperature occurs, it is not the same temperature as the environment.  You are not really gaining anything in long term stability by trying to shave off a few degrees.  HP/Keysight uses 15K in their modules and that includes the 'golden' 3458As and they are perfectly stable for years at that temperature.  You definitely do not need to run it with 15K, unless you're running it in a rack for instance, but you aren't going to get better stability by running it too cool either.

[Edwin G. Pettis]

Thank you for clearing up what that HTSUS number does, I do indeed include that on the customs when I ship to Germany and Andreas was the one who originally supplied it to me, thank you.  Since I am not on the 'receiving' end, I can only go by what my customers have told me about their customs experience, in Germany it has varied some depending on where the package went, some local customs were exceedingly picky about paperwork and contents while others not so much.

[MiDi]

As most people - me included - want to go for the Ultrohm Plus Resistors from Edwin, I asked him for a special deal.

Edwin is so kind and gives us a special offer, I put the details in the first post, but here is the short version of the rules for 'bulk' order (hopefully I got it right):
- valid only within a given time span (tbd)
- valid only for orders marked for this special offer
- individual order with individual shipping (like normal order)
- after time expired the orders will be treated as one big order and the discounts are added for each individual resistor value

My suggestion for the time span: sunday 2018-10-07 till sunday 2018-10-21.
So we have a bit of time to talk about questions and to prepare.
If you agree with this, please leave a "thanks" as feedback.

If everything is prepared, I will do the advertisement here and give the details (time span & passcode).

[BradC]

The LTZ1000ACH at Digikey is backordered until November

... and now due to arrive on Monday.  Yay Digikey!

I just priced the Bourns 3290 trimmers. I could buy 3 Ultrohm Plus  0.01% resistors for the price of one trimmer.
I've ordered some 3292W for the boards in question, but I'm starting to think I'll just use the op-amp to track the LTZ and spit out a buffered 7.x volts.

[MiDi]

For those that are not on a rush for buying Ultrohm Plus can now benefit from special offer from Edwin:

- Add discount code "Halloween" to your order in E-Mail to pettiseng@q.com
- The discount code expires on sunday 2018-10-21

The orders are collected till 2018-10-21 and then treated as one order for discount & manufacturing.
Everyone then gets the final pricing and individual shipping charges.
See details in first post.

Your order should include:

Code: [Select]

- Discount code: "Halloween"
- Quantity and value of resistors (±0.1%, ±3 PPM/°C maximum, 0.250” D x 0.375” L is standard, add for other specs)
- Complete shipping address
Edit:
Expired, but feel free to organize new one.

[VK5RC]

Thanks MiDI, Edwin, DrFrank and Brandiac 

[meandeev]

Thanks from me, too!

but I tried to send an e-mail and got an error. Does anybody has the same problem?
--------------------------------
A message that you sent could not be delivered to one or more of
its recipients. This is a permanent error. The following address(es)
failed:

pettisieng@q.com:
SMTP error from remote server for RCPT TO command, host: mx.centurylink.net (206.152.134.65) reason: 550 5.1.1 [R2] Recipient pettisieng@q.com does not exist here.
---------------------------------

[SvanGool]

You should drop the last "i" out of the address you used, Edwin's email is working fine today 

[meandeev]

Looks better, no error.

I copied the address from the first post.

@MiDi: was this intended (to block e-mail grabbers)?

You should drop the last "i" out of the address you used, Edwin's email is working fine today 

[MiDi]

I copied the address from the first post.
@MiDi: was this intended (to block e-mail grabbers)?

Where did you got it? Do not see it.
In the announcement is the linked mail, no c&p needed.

[dkozel]

Is everyone going for ±0.1%, ±3 PPM/°C maximum resistors or is anyone specifying higher tolerances for some/all of the resistors?

Based on these results it looks like improving the tempco of R4/5 and R2 (and the 10V output divider if used) is useful for the output stability.
https://github.com/pepaslabs/ltz1000-info

[dkozel]

I ended up going for ±0.1%, ±3 PPM/°C for everything except the output divider which is ±0.01% mostly for vanity sake.

I was tempted to get lower tempco R4/5 resistors, but tbh I'm too newbish with voltnutting for that to be worthwhile. Once I can measure the end tempco of the whole reference then maybe I'll upgrade them. Or try to match the three sets I have as close as possible... Sounds like a great way to never actually build the whole circuit.

Thanks MiDi for organizing this buy, it's pushed me to actually go forward with it!

[meandeev]

it was the last line of the "quote of pm" in the first post.

I copied the address from the first post.
@MiDi: was this intended (to block e-mail grabbers)?

Where did you got it? Do not see it.
In the announcement is the linked mail, no c&p needed.

[pansku]

So what is the "standard" resistor configuration most of you ordered, is it the one from the first post for non-A configuration (12,5k or 13k?) and the two for the 10V stage?

Edit: With the size, tempco's and tolerances from the same post?

[MiDi]

Standard would be Datasheet values - 13k for ~60°C set point.

I went for 12k for non A and 12.5k for A as I want to use both at low temp.

For 10V boost went for 5k & 12/12.5k with same specs for tests.

If you want precise 10V output you would order individual values for specific LTZ1000 with tighter tolerance.

[BradC]

So what is the "standard" resistor configuration most of you ordered, is it the one from the first post for non-A configuration (12,5k or 13k?) and the two for the 10V stage?

Edit: With the size, tempco's and tolerances from the same post?

I haven't ordered any boost resistors. I've gone with 4 standard LTZ sets. 3 with 13k and 1 with 12.5k. Reading Edwins posts he specs his resistors at 3ppm as that appears to be the worst possible case (short of damage). If you wanted anything specifically tighter I suspect then you're into testing and selection and that might get expensive, although prices I've seen bandied about even for unrealistically tight tolerances seem to be pretty damn reasonable. I plan on testing 4 sets to figure out which parts track the best for a single "best" set with the 12.5k resistor. It feels a bit like bike-shedding, but what they hey.

Anyway, some Sfernice resistors arrived today so when the boards get here I have 2 I can assemble while I wait for the Ultrohm Plus units to arrive (I ordered mine a couple of weeks ago, before the *special* offer so hopefully I'm ahead on the production queue). I have KX boards due in the next day or so, and the boards from branadic should be here in the next couple of weeks.

[pansku]

Standard would be Datasheet values - 13k for ~60°C set point.

I went for 12k for non A and 12.5k for A as I want to use both at low temp.

For 10V boost went for 5k & 12/12.5k with same specs for tests.

If you want precise 10V output you would order individual values for specific LTZ1000 with tighter tolerance.

Thanks, I just sent the email. I'll be building 2 boards with these and for the third I'll try and get some VHP-parts through work for my "absolute" 10V reference and have that characterized by the cal lab from work (1 step down from NMI) with their 8508 when there is a free time slot

There are so many pages of the LTZ-thread, can any of you remember some pages where they talk about aging the references in heat. I might have access to a weather cabinet at work which goes from -20c to 140c for the holiday season, fingers crossed 

[MiDi]

Look at the last posts, you might not want to do that after reading -> hysteresis.

[blackdog]

Hi,

For a number of years now I have two LTZ1000AHC reference ICs on the shelf.
I want to use them now and who do I order the resistors from... the topics are still a bit unclear.
is there still a joint buying action or should I order it from Edwin before October 21?

I would also like to have resistors to go from 7V to 10V.
Yes I know that the preciece values vary per IC.

Thanks for the help and kind regards,
Bram

[MiDi]

I want to use them now and who do I order the resistors from... the topics are still a bit unclear.
is there still a joint buying action or should I order it from Edwin before October 21?

I would also like to have resistors to go from 7V to 10V.
Yes I know that the preciece values vary per IC.

As most went for the Ultrohm Plus PWW from Edwin, you could go with them and participate from special offer till October 21.
In first post there are details given from Edwin, also regarding boost 7V->10V dividers.
Finally you have to make your own decision...

For other manufacturers there is currently no joint buying, but feel free to organize one 

[MiDi]

Last call for special offer

[quarks]

Last call for special offer

thanks for the reminder allmost missed it

[MiDi]

Just short update on Halloween special from Edwin:

I have started sending out final pricing, you are in the second batch which will go out very soon.  Response was well beyond what I was expecting; the ‘paperwork’ is eating up a lot of time.  The first batch of resistors will be going out soon and I have started prepping for the second batch.

So for those that did not receive final pricing yet, Edwin is very busy with our orders and we will receive it soon 

[Edwin G. Pettis]

I've had an inquiry about the final pricing, so to hopefully prevent a bunch of e-mails:

After I announced the base price and discount, the orders kept coming in, necessitating a restocking of some inventory.  I have been running on inventory I bought awhile back, since then the supplier has raised prices significantly (over 100%).  Since I didn’t want to hit a significant number of later ‘Halloween’ customers with a large increase, I took a minimal amount averaged into all of the parts which did bring the discount down a little, without it; it would have been closer to 9% or less.  I had not increased my pricing while I was running off of the old inventory knowing that someday I would have to restock and get stung by the higher prices.  There is no way around it.  Once this ‘NOS’ inventory is gone I will have to bump up prices to cover the increase and I won’t be able to soften the hit like I did now.  The pricing is still at the 100+ price discount even with the small hike.  According to my research, my pricing is still lower than Rhopoint’s  or NEOHM's 100 piece pricing.

[julianhigginson]

That's a shock to have your costs go up so much. thanks for trying to do what you can with it.

Looking forward to getting my order whenever it's able to be done.

[MiDi]

Everyone who ordered on Halloween special from Edwin should have received the final pricing, if not: please contact Edwin.

[julianhigginson]

Everyone who ordered on Halloween special from Edwin should have received the final pricing, if not: please contact Edwin.

Edwin had told me not all quotes are sent out yet (mine wasn't when I read this post....) Apparently we will have him building resistors for quite some time. :-)

[BradC]

Everyone who ordered on Halloween special from Edwin should have received the final pricing, if not: please contact Edwin.

Edwin had told me not all quotes are sent out yet (mine wasn't when I read this post....) Apparently we will have him building resistors for quite some time. :-)

That's what we call "a nice problem to have". I'm glad I got mine ordered a month ago.

[artag]

For some reason we don't have this with stuff imported from China. As a Brit I look forward to Brexit so we can drop this insane EU shit and import stuff as freely from the USA as we get with China.

Well .. except for EU countries. At the moment they're quick and cheap for the UK, and the bankers don't get much commission. Once we're out of the club, we'll have to deal with Germany the way the USA etc. does now - painfully. The USA will probably be the same as it is for us now, unless Trump throws a wobbly. So will the middle east, because the arms dealers don't want to pay too much tax. China should be the same, but one day HMRC will catch up with them and start taxing them to the rules. So .. I'm not sure where will be easier to deal with. Somewhere that isn't the far east, the far west, europe. And does electronics. Maybe Putinland ?

[julianhigginson]

That's what we call "a nice problem to have". I'm glad I got mine ordered a month ago.

yeah, I'm totally spare time on this project, and have a few other spare time projects also competing for attention, so I'm not fussed (still need to order a PCB for the project too)
I'll get there someday. :-)

[Edwin G. Pettis]

Halloween orders – update

I have been busy working on orders, while the holidays did slow things down a little (can’t ignore the wife all the time), I have finished and shipped all orders up to and through October 13th.  I have started production on orders from the 14th.  Some orders contained additional resistors over and above the LTZ and scaling resistor sets which took additional production time.  The same can be said for the remaining orders, a few are fairly large.  I am notifying everyone as I get near or start production of your order. Be assured I am making them as quickly as is possible.  I thank everyone for their patience and orders.

Best regards,

Edwin Pettis

Ultrohm Plus

[MiDi]

Received mine last week, thank you Edwin!

Here is a selection of them:

[hwj-d]

@ G. Pettis,

how long is the delivery of a current order of two ltz1000 sets likely to take?

Thanks

[Edwin G. Pettis]

@ hwj-d

Given the remaining quantity of resistors on order, I doubt I could get to any new orders sooner than the end of February most likely.  Two sets wouldn't take very long.

[hwj-d]

@ hwj-d

Given the remaining quantity of resistors on order, I doubt I could get to any new orders sooner than the end of February most likely.  Two sets wouldn't take very long.

PM sent. 

[pansku]

Hi,

Any rough ETA for batch #4?

Regards, pansku

[hwj-d]

Edwin let me into the Halloween discount.
That's very accommodating!
Thanks a lot for that.

 

[BFX]

Hi,
I would like two sets also.
Thx

Regards

[Edwin G. Pettis]

@pansku,

Depends on when you ordered but possibly some time in February, there are some large orders in the 4th batch along with a bunch of smaller ones.

@BFX,

contact me directly at pettiseng@q.com

Thank you.

[ipqobk]

Can I have information to order two sets?

Thank you,

Paolo.

[Edwin G. Pettis]

To all the remaining orders from the Halloween discount......I had to order more bobbins last month (May) as I was running out of inventory, I was just notified of a problem at the manufacturer that will delay shipping a few more days but should be very soon, they are being shipped air mail.  Sorry for the delay but the mix up made the bobbins unusable in their current state and they required additional machining to fix the problem.  I will notify the remaining customers when their orders go into production.  Not what I wanted but it happens, the remaining orders are mostly smaller ones so I should be able to get through them relatively quick.

[hwj-d]

To all the remaining orders from the Halloween discount......I had to order more bobbins last month (May) as I was running out of inventory, I was just notified of a problem at the manufacturer that will delay shipping a few more days but should be very soon, they are being shipped air mail.  Sorry for the delay but the mix up made the bobbins unusable in their current state and they required additional machining to fix the problem.  I will notify the remaining customers when their orders go into production.  Not what I wanted but it happens, the remaining orders are mostly smaller ones so I should be able to get through them relatively quick.

Thanks for your reply, Edwin. I was almost seriously worried.