[time-nuts] Ublox 8T

[Mark Goldberg]

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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