[GreenKeys] 120vdc connectors - opinions?

[Robert Downs]

Yeah, it's one of my less useful pet peeves - like "ARC5" and "ART13", too entrenched to ever wipe out.

Robert Downs


-----Original Message-----
From: acti at provide.net [mailto:acti at provide.net] 
Sent: Monday, June 25, 2018 10:10
To: Robert Downs; Greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] 120vdc connectors - opinions?

Hey Robert,
Thanks for the update on the Amphenol connector family.
Very interesting!

As to "DB9 vs DE9", yes, you are correct.

However most people do erroneously call and recognize it as
"DB9" and scratch their heads with funny looks whenever I've
ever tried to call it "DE9".

Radio Shack didn't help either.  They always also called it a DB9.

Ever since the 9 pin D-sub superseded the 25 pin in PC RS-232
usage, everyone just assumed DB was its prefix as well.
(Ditto with the distributor I worked at back then...)

In fact, if you Google "DB9", the first hit continues
that misnomer tradition, and fails to even MENTION "DE9":
... http://www.l-com.com/what-is-a-db9-connector

Since no one understands my using DE9 elsewhere, I've
just given up and joined the crowd...  So, sorry.
I should have known THIS forum would know better! [grin]

- Keith

On 2018-06-25 01:01, Robert Downs via GreenKeys wrote:
> First, out of the D-Subminiature connector family, a DB has 25
> contacts, period.  The 9-contact variant is a DE.  Of the rest, 15 is
> DA, 37 is DC and 50 is DD.  So DB9 doesn't exist.  However, I know
> that from long usage (or mis-usage), DB9 is commonly used, and so long
> as you aren't trying to buy some, there's no danger of picking up the
> wrong plug.
>