[time-nuts] Ublox 8T

[Bob kb8tq]

Hi

If you *do* get some of these:

The uBlox modules are soldered together internally with very normal 
solder and processes. The board conducts heat pretty well. Getting the
module off the board without disturbing the internal parts or pads on the
module can be a bit tricky …..

Bob

> On Dec 10, 2020, at 7:30 PM, paul swed <paulswedb at gmail.com> wrote:
> 
> Bob oh the ole dead bug is absolutely an option. Don't need LNA power so
> that makes everything even easier. I think there are numbers of grounds.
> But was hoping for a nice little PCB. Was going to buy several of the units
> but by the time on the same day I went to order magically they went up $5
> each. I did submit a offer that was rejected. Oh well.
> Not that I needed 10 units. :-)
> Ones good enough.
> Regards
> Paul
> 
> On Thu, Dec 10, 2020 at 7:10 PM Bob kb8tq <kb8tq at n1k.org> wrote:
> 
>> HI
>> 
>> In a “typical” use case ( it’s TimeNuts … typical ????? ) there are a lot
>> of the
>> pads on the part that simply hang loose. More or less, power / antenna /
>> serial
>> and you are good go go. The other 80% or so of the pads can just hang
>> open.
>> You *could* dead bug the thing ….
>> 
>> Bob
>> 
>>> On Dec 10, 2020, at 5:16 PM, paul swed <paulswedb at gmail.com> wrote:
>>> 
>>> Hello to the group and it sounds like someone could create some empty
>>> boards.
>>> But I am curious. I looked at Allibaba and see that ublox NEO6 boards are
>>> available for little cost. Have not looked at the pinouts of the 8T to
>>> compare but might it be a case of removing a neo6 and replacing it with a
>>> 8T?
>>> I have an 8T on order so one way or another will need to do something.
>>> Regards
>>> Paul
>>> WB8TSL
>>> 
>>> On Thu, Dec 10, 2020 at 10:31 AM Bob kb8tq <kb8tq at n1k.org> wrote:
>>> 
>>>> Hi
>>>> 
>>>> I’ve looked at several “you supply the components” outfits. Each time
>> I’ve
>>>> dug into it,
>>>> the mechanics of supplying an adequate number of parts has been pretty
>>>> daunting.
>>>> None of the things I do is very “high volume” ( 10 is a lot of boards
>> for
>>>> me ).
>>>> 
>>>> Bob
>>>> 
>>>>> On Dec 10, 2020, at 9:21 AM, Mark Goldberg <marklgoldberg at gmail.com>
>>>> wrote:
>>>>> 
>>>>> If you have some volume, consider Small Batch Assembly:
>>>>> 
>>>>> https://www.smallbatchassembly.com/
>>>>> 
>>>>> They are not as cheap as the Chinese suppliers, but you can provide
>>>>> your own components, and it is run by a very helpful gentleman in the
>>>>> Washington DC area. I got the bare boards from OshPark and you can
>>>>> order your components from distributors and send them directly to
>>>>> Small Batch. I preferred using my own parts from known sources, but
>>>>> they have a stock of components also.
>>>>> 
>>>>> Regards,
>>>>> 
>>>>> Mark
>>>>> 
>>>>> On Thu, Dec 10, 2020 at 6:43 AM Bob kb8tq <kb8tq at n1k.org> wrote:
>>>>>> 
>>>>>> Hi
>>>>>> 
>>>>>> If you have a board with many dozens of passive parts on it and
>>>>>> four or five IC’s getting all those passives down on the board *is*
>>>>>> very useful. Their price on typical passive parts is low enough that
>>>>>> the delivered cost is still very close to a bare board.
>>>>>> 
>>>>>> If you do use odd IC’s you have to move quick. Get the board(s) laid
>>>>>> out and into them fast. Accept that you may not be in stock next week.
>>>>>> For things like three terminal regulators or run of the mill digital
>>>> stuff, they
>>>>>> seem to maintain a pretty good inventory. Yes, it will be in “their”
>>>> favorite
>>>>>> package ….
>>>>>> 
>>>>>> Bob
>>>>>> 
>>>>>>> On Dec 10, 2020, at 2:48 AM, Matthias Welwarsky <
>>>> time-nuts at welwarsky.de> wrote:
>>>>>>> 
>>>>>>> On Mittwoch, 9. Dezember 2020 23:58:51 CET Bob kb8tq wrote:
>>>>>>>> One note: JLPCB is the only “fab + assembly” outfit I’ve tried.
>> Their
>>>> boards
>>>>>>>> are no better / no worse than a lot of other board fab outfits. I
>>>> have no
>>>>>>>> idea how they compare to other assembly houses. My selection
>>>> criteria: “
>>>>>>>> are they the cheapest I can find?”
>>>>>>> 
>>>>>>> Currently, you will not find any other fab+assembly service that is
>> as
>>>> cheap
>>>>>>> and requiring (almost) no human intervention. For protoype runs with
>>>> two to
>>>>>>> five boards assembled there is no competition. I'd say even for 50
>>>> boards
>>>>>>> there isn't.
>>>>>>> 
>>>>>>> The JLCPCB PCBs are ok, the biggest letdown is the solder mask. It's
>>>> just
>>>>>>> plain bad. It flakes off on the tiniest rub with a hot iron.
>>>>>>> 
>>>>>>> The biggest obstacle for sure is the limited parts catalog. They have
>>>> a decent
>>>>>>> assortment of passives but almost all active parts come from the
>>>> "extended"
>>>>>>> listing (extra cost, 10 uniques only) and they may not stock the
>>>> footprint you
>>>>>>> want to use, and the wildly fluctuating inventory.
>>>>>>> 
>>>>>>> I'm treating them mainly as a layer of convenience. I let them place
>>>> all the
>>>>>>> boring passives and maybe a few common actives, but I don't go out of
>>>> my way
>>>>>>> to design along their catalog only, knowing that they might not have
>>>> stock of
>>>>>>> all the parts anyway when I order the boards.
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> 
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>>>>>> 
>>>>>> 
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