[sdiy] 3.5mm vertical PCB mount mono sockets with NC contact - QingPu PJ3010BM

[Neil Johnson]

There's a long thread, and multiple group buys, for these jacks over
on the MMTA forum.  It seems the efforts of the MMTA members persuaded
WQP to use the springier beryllium copper.

Neil

On 28 November 2012 08:12, Robin Whittle <rw at firstpr.com.au> wrote:
> Here is a web page with everything I know about this crucial subject:
>
>   http://www.firstpr.com.au/rwi/parts/3.5mm-sockets/
>
> This page is primarily concerned with the new beryllium-copper version
> of the QingPu Electronics WQP-PJ3010BM.  My page also considers some
> alternative sockets.
>
> The previous version, or perhaps it was their PJ301BM version) used
> phosphor bronze for the primary contact - which could become deformed,
> leading to a non-functioning NC contact.
>
> I bought 100 of the deformable sockets from Erthenvar in the USA, who
> offer a very good deal:
>
>   http://erthenvar.com/store/eurodiy/jack35mmv
>
> However, they noted a potential problem with the NC contacts.
>
> Edan Wang at QingPu was really helpful, including responding several
> times to my initial queries on Sunday evening.  He sent me samples of
> the new production sockets and they have no deformation problems.  These
> use a dual NC contact, which I think will be more reliable than the
> usual single contact arrangement.  Edan told me that 5000 of the new
> production sockets were on their way to the Erthenvar people, so this
> will be a good place for many people to buy them.
>
> This subject is covered by the Muffwiggler wiki page:
>
>   http://wiki.muffwiggler.com/wiki/Vertical_Mount_Components
>
> which I just updated.
>
> I will post a version of this message on the "Muff's Modules & More" forum:
>
>   http://www.muffwiggler.com/forum/viewforum.php?f=4
>
>
>   - Robin
>
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