[Halld-tracking-hw] cable strip length

[Curtis A. Meyer]

Hi Fernando -

     based on your references, we found a reasonably priced tool that
can set any length of strip you want. Assuming the following represents
the end of the wire:   A is the stripped length of the conducting core, B
is the length of the teflon insulator and C is the stripped length of 
the outer
braid.

                                                      
eeeeeeeeeeeeeeeee      teflon
                                         bbbbbbbbbbbbbbbbbbbbbb     braid
                                eeeeeeeeeeeeeeeeeeeeeeeeeeeeee     teflon
                       xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx    conducting core
                                 eeeeeeeeeeeeeeeeeeeeeeeeeeeeee    teflon
                                          bbbbbbbbbbbbbbbbbbbbbb   braid
                                                      
eeeeeeeeeeeeeeeeee    teflon

                      |-- A--|-- B --|-- C -- |

The standard stripper we had set A=B=C=6mm. This is no longer necessary,
but we need some feel for what reasonable lengths are. We could probably 
solder
with A=3mm. The insulation on B probably needs to be of similar length 
(3-4mm),
and then the question comes to the outer braid.

Currently, we are using some crimp on tubes to help solder to the board. 
The only
length that we are able to find for these is 6mm. If someone knows of a 
source of
shorter pieces that are not outrageously expensive, that would control 
this length.
Lacking that, it appears that our current solution would need C=6mm.

The above dimensions have a PC board that extends about 1.2 to 1.3 cm beyond
the connector on both sides of the connector. It is also important to 
note that the
wires themselves extend beyond the board as it takes some space to bend them
through 90 degrees so that they can go through the swiss cheese plate.

That all said, I think that there is some hope of shortening C if an 
appropriate
part can be obtained.

   - Curtis

Fernando J. Barbosa wrote:
> Hello everyone,
>
> I need to know what is your final spec for the stripping of the coax. 
> This is needed before Slava can proceed with the final placement of 
> the preamp connectors due to spacing.
>
> Best regards,
> Fernando


-- 
Prof. Curtis A. Meyer		Department of Physics
Phone:	(412) 268-2745		Carnegie Mellon University
Fax:	(412) 681-0648		Pittsburgh PA 15213-3890 
cmeyer at ernest.phys.cmu.edu	http://www.curtismeyer.com/