On 8/21/19 9:30 AM, Dan Atchison via TowerTalk wrote:
Thanks to all who responded.
My original post neglected to mention I was looking for 8-pin Cinch
Jones inline connectors, M and F (300 series).?? I did find some on eBay
and ordered them at a premium.
For those who suggested electronics distributors - which I had prior to
my email - here's what I found:
Jameco - no eight pin and few others
Mouser - no eight pin and few others
Newark - no stock, only large quantities
Digikey - ditto
Electronics Surplus - most not in stock, 8 pin, no of course
Cinch Jones connectors where the defacto standard seemingly forever, but
I guess times have changed.
The Jones plug was invented by Howard Jones in the 1930s, and saw a lot
of use in WW II as a multipin connector, so there was a lot of surplus
available post war. It's not surprising that some of the older ham gear
was designed to use that connector, and it was in wide use up through
the 50s, and probably 60s.
That said, I don't know that I've seen *new* equipment using Cinch Jones
connectors designed in the last 50 years (since 1970), except for
something made to be compatible with earlier vintage equipment. Flat
blades, no locking mechanism, no environmental protection. 300 series is
250V, 10A contacts, which isn't particularly exotic.
I suppose, if you've got an application where there's lots of mate
demate cycles but limited vibration, the flat blade and spring works ok
- it wipes on mate, and it's inexpensive to manufacture.
It's just that there's so many potentially better connectors out there
these days. Things like locking capabilities, shrouded contacts, good
vibration handling, inexpensive termination and cable manufacturing, etc.
Several of you responded with Anderson Powerpoles which are fine, but no
strain relief - at least I can't find them with strain reliefs.?? To me
that's an important option because I disconnect everything when the
station is not in use - regardless of my grounding to Motorola's R-56
standards in which, as I knock on wood, I've not had a lightning strike
(nice run-on sentence).?? Murphy, keep your distance.
Indeed, there's no powerpole "housing" with a separate cable clamp
(like, e.g., the inexpensive circular plastic connectors). However, the
"pull out force" for the contact, once it's inserted in the housing, is
pretty high.
There are panel mount configurations that interlock with the little
channels on the powerpoles.
So maybe the question is what strain are you looking to relieve?
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