Star-fst-l mailing list

[Yi Yang <yiyang AT ncku.edu.tw>]

Hi Gerard,

The part numbers are A22-2-T-34-V22 for T-board and A22-1-T-34-V16 for hybrids.

Please find the drawing for A22-1-T-34-V16 in the attachment. Maowu and Jianing are requesting the drawing for A22-2-T-34-V22 from Nicomatic and will provide to us later.

Regarding your questions "The intention has always been that the connectors are fixed to each other by fixing screws. It is *not clear* to me that this would even have been possible with the "Male and female straight SMT on PCB" style (in attached picture here too).", I am asking the engineer from Nicomatic and will let you know once I have the answer. 

I agree with you that there is no mistake since at that time we do want to use screws to fix female and male connectors.

Cheers,

Yi

+++++++++++++++++++++++++++++++++++++++++++++++++++
Yi Yang, Associate Professor
Department of Physics
National Cheng Kung University
Tainan, 701 Taiwan
E-Mail: yiyang AT ncku.edu.tw
Tel: +886-6-2757575 ext.65237
Fax: +886-6-2747995
Group Web: http://phys.ncku.edu.tw/~yiyang
+++++++++++++++++++++++++++++++++++++++++++++++++++

On Wed, Nov 11, 2020 at 1:04 AM Gerard Visser <gvisser AT indiana.edu> wrote:

Dear Yi,
        I think this is probably reasonable. But can you please document here in reply
the exact and complete partnumbers for the connector we'll use on the hybrids,
and the connector we'll use on the T-boards?
        The intention has always been that the connectors are fixed to each other by
fixing screws. It is *not clear* to me that this would even have been possible
with the "Male and female straight SMT on PCB" style (in attached picture here
too). I think that was *not* the plan, and the 'mistake' is no mistake.
        But let's please reconfirm here with the exact full partnumbers, and if you
have drawings for those two exact partnumbers too that will be helpful since the
Nicomatic website doesn't seem to always have drawings available on all the
parts. I'm not sure.
        Thanks, sincerely,

                Gerard


p.s. Filling under the connector around the solder joints with a suitable epoxy
is perhaps good. We have to be sure that the solder joints are good, and are
completely clean of flux, before doing that. I think so anyway. What sort of
solder and flux are to be used?


On 11/10/2020 11:19 AM, Yi Yang wrote:
> (I have some issues sending email to the STAR mailing list, so I also added the
> individual emails.)
>
> Hi Gerard,
>
> The short summary of what we discussed about the connector issue is that we
> purchased the WRONG connectors. Please see the drawings in the bottom on page 3
> of the first attachment, Felix pointed out that we should use the middle one
> "Male and female straight SMT on PCB" instead of the right one "Male SMT and
> female on cable".
>
> The perfect solution will be to replace the screw parts to "V22 Straight
> jackpost" (the first item in the table), but it will take too much time. So we
> proposed to use epoxy to enhance the strength between the connector and
> hybrid, and this can be done later. What do you think?
>
> Cheers,
> Yi
>
>
>
> +++++++++++++++++++++++++++++++++++++++++++++++++++
> Yi Yang, Associate Professor
> Department of Physics
> National Cheng Kung University
> Tainan, 701 Taiwan
> E-Mail: yiyang AT ncku.edu.tw <mailto:yiyang AT ncku.edu.tw>
> Tel: +886-6-2757575 ext.65237
> Fax: +886-6-2747995
> Group Web: http://phys.ncku.edu.tw/~yiyang
> +++++++++++++++++++++++++++++++++++++++++++++++++++

Attachment: A221TnnV16_cl_Ind b[1864].pdf
Description: Adobe PDF document