19 Sep
2019
19 Sep
'19
11:43 a.m.
>>> Please don't let anybody call the 25
pair 50-pin miniature ribbon
>>> connector (RJ21), "Centronics"!
>> We used to call them "blue ribbon" connectors. I'm sure that
that's
>> also a misnomer.
> I still believe that that is the correct name.
> I've always assumed that that was Amphenol's name for that line of
> connector when they invented it. I also assumed that "blue ribbon" was a
> reference to the blue first-prize ribbons at county fair type contests.
> Although a friend claimed that that name was unintentional, since instead
> of pins, it uses "ribbon contacts", hence also "micro ribbon
connector".
> and many of them had a BLUE plastic center section.
On Wed, 18 Sep 2019, Jon Elson wrote:
The original Amphenol connector was about 3 X the
contact spacing of the
micro-blue ribbon
connector, but basically the same design. They used Diallyl pthalate
insulators. I don't know if these are just always dyed blue, or the chemical
makeup makes them blue, but it is a deep blue color. So, that's where the
blue in the name comes from. The contacts are punched out of a ribbon of
gold-plated beryllium copper, so that's where the ribbon in the name comes
from.
Thank you.
I appreciate the detailed explanation.
--
Grumpy Ol' Fred cisin at xenosoft.com