[time-nuts] Power connectors continued
mark at alignedsolutions.com
Thu Jun 22 19:40:20 EDT 2017
I hear what you are saying and basically agree with you.
In my experience however phrases such as "25 pair amphenol connector" and "2 pin Deutsch connector" have a commonly accepted meaning in the industries I have worked in over the years. Putting these terms into Google brings up the items I expect to see which is admittedly a fairly subjective criteria. I agree however there are more precise designations and that in many circumstances they should be used. Sorry I don't remember what they were / are and rarely needed to use them in practice. I'm more or less retired and what ever memories I had of specific connector part numbers beyond the standard terms used in the industries I have worked in have largely faded.
As this is a hobby for me I'm disinclined to look up specific part numbers but can appreciate that others may wish to do so and welcome the additional detail.
I believe there is some benefit to further discussions along these lines (perhaps though there should be a connector nuts list.)
From a time nuts perspective I expect there could be healthy discussion to be had about the relative merits of BNC vs SMA connectors for example.
The issue of power connectors with locking devices is also in my view quite relevant to time nuts. The dialogue vis a vis power pole connectors has also been one of the best I have ever seen on the Internet.
mark at alignedsolutions.com
> On Jun 22, 2017, at 3:54 PM, Arnold Tibus <arnold.tibus at gmx.de> wrote:
> I can second Magnus and want to throw in some more details.
> Cannon, Deutsch, Bendix, Souriau, Matrix, Amphenol, etc. etc. are (big)
> companies manufacturing all kind of connectors and are n o t connector
> type designations! Important are the type numbers of the manufacturer or
> higher level specification numbers.
> We used in the aircraft and spacecraft business naturally the military
> (MS-) numbers listed in the MIL-QPL (or eg. for Spacelab with GSFC spec.
> no). Most types of connectors are under these numbers available from
> different manufacturers, of course with different manufacturer in house
> part numbers. Attention: the 'same' connectors may be bought w/o the
> Mil.-spec. sheets with somewhat lesser quality. Important details are
> the max. mating number, the contact resistance (e.g. 20 mOhm) and the
> max. continuous current, max. Voltage, vibration resistance and
> reliability etc. Of course, this makes good connectors somewhat
> 'expensive'. Hirel and non-magnetic gold plated D- subminiture type
> connectors do survive e.g. the rocket launch phase (high vibrations),
> vacuum and low temperatures and are still used for space projects.
> The D-sub series of connectors was introduced by Cannon in 1952. They
> are still available as standard, hirel, and non-magnetic versions. The
> contacts were machined contacts forcrimping or soldering connection and
> made of massive copper with gold finish. (more see e.g.
> https://en.wikipedia.org/wiki/D-subminiature). Example for the standard
> 9 pin connector designation (crimp): DEMAM-9S and DEMAM-9P. Today are a
> big number of companies producing equivalent types. Cheap ones are
> equipped with contacts made of sheetmetal. Nobody should expect then the
> same spec. values as reliability, mating numbers, contact power rating etc.
> It is up to the designer of a product to be informed and select the
> right quality device for his product ...
> I hope I could enlight a bit the connector selection and nomenclature point.
> regards, 73
> Arnold, DK2WT
>> Am 22.06.2017 um 21:10 schrieb Magnus Danielson:
>> The second connect has been called "Cannon" and XLR, and is not
>> generally recogniced as XLR, which is the product range name.
>> Naming of the first connector as "Cannon" is at least for me and many
>> others confusing. This is a good example how vendor name for a
>> connector type is not a good thing. The first connector is a circular
>> MIL-STD connector (don't remember the correct notation), and this is a
>> product available from ITT Cannon as well as AMP.
>>> On 06/22/2017 08:42 PM, Mark Spencer wrote:
>>> Sorry if I have caused any un due confusion thru my perhaps incorrect
>>> use of the terms "cannon" and "XLR."
>>> The green connector with 4 separate female contacts is what I
>>> perhaps in correctly referred to as a "cannon" connector. The silver
>>> connector with 3 separate female contacts was what I perhaps
>>> incorrectly referred to as a "XLR" connector.
>>> Both were in use in my lab powering time nuts gear.
>>> Mark Spencer
>>> mark at alignedsolutions.com
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