Re: [time-nuts] Power connectors continued

[Chris Albertson]

These expensive and exotic connectors are nice but are over kill for most
projects which live their entire lives on a lab bench and never fly to Mars
or even Low Earth Orbit.

I found out about "GX" style connectors a while back.  They are multi-pin
circular connectors with screw down locking rings with from 2 to 8 poles
and size either 12mm or 16mm diameter They are not suitable for use on
airplanes or the like but good enough for machine tools and any hobby
project that needs straight (no coax)  pins that are rated to 5 amps
continuous.

The really good part is the cost.   About $1 per mated pair.   Find them on
eBay searching for gx16 for the 16mm version of gx12 for the smaller one.
here is an example:
http://www.ebay.com/itm/10-Pcs-8-Pin-16mm-GX16-8


I think these win the bang per buck contest.

For a buck each, these are not machined from brass, I think molded pot
metal and chromed.


-- 

Chris Albertson
Redondo Beach, California
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Re: [time-nuts] Power connectors continued

[Christopher Hoover]

>
>  They will definitely not work loose.


ODU or Glennair (I forget which) has a ratcheting lock ring on some of
their connectors.  It has asymmetric ramps on the ratchet cam that tighten
the lock ring under vibration.

-ch
73 de AI6KG


On Fri, Jun 23, 2017 at 9:01 PM, Charles Steinmetz 
wrote:

> Someone previously mentioned "aviation" style connectors (which many will
> recognize as mobile microphone connectors) (see graphic below).  I switched
> to these for power and other connections long ago, and have been extremely
> happy with them.
>
> One nice thing about them (IMO) is that all chassis connectors are male,
> and all cable connectors are female (unless you use a male in-line
> connector to make an extension cable).  This means that a dangling cable
> will never have rudely exposed contacts, and if you are really worried you
> can use vinyl caps to make sure.  Similarly, the pins on the male chassis
> connectors are well recessed so it isn't easy to short them, but if you
> want to be sure you can get screw-on caps (see below).
>
> The contacts have substantial tension when mating/mated, plus secure
> threaded locking rings.  They will definitely not work loose.  They will
> handle at least 5A per pin, and I've seen published ratings of 10A. They
> have good strain reliefs, too.
>
> They are available in a wide range of pin counts, so it is easy to make
> sure cables are not cross-compatible.
>
> One really nice feature is the availability of right-angle in-line
> connectors, to minimize the space needed behind equipment (this can be
> problematic with some other connector series).  Use many connectors and you
> will find that this can be an extremely valuable feature.
>
> On ebay, they are known as "aviation connectors," and are available in
> three sizes (12mm, 16mm, and 20mm, according to the diameter of the bodies,
> which is also the hole size for the chassis-mount connectors). Search for
> GX12, GX16, and GX20.  I have standardized on the 16mm version, but have
> tried and can recommend them all.  Shop a little and you will find them at
> very attractive prices.
>
> I've bought lots of them, from US and foreign suppliers, and as far as I
> can tell they all come out of the same factory in China.  All good quality.
>
> Best regards,
>
> Charles
>
>
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Re: [time-nuts] Power connectors continued

[Adrian Godwin]

Working in motorsport, we used the Deutsch Autosport series. They're based
on military connectors but are lighter and possibly cheaper. Still far from
cheap, but high density, high reliability and MUCH easier to assemble than
Lemos. Usually crimped pins and raychem heatshrink cable entry.

https://www.prowireusa.com/c-6-deutsch-autosport.aspx

On Sun, Jun 25, 2017 at 1:12 AM, Bob kb8tq  wrote:

> Hi
>
> If you have a phase noise under vibration requirement, you do *not* want
> to use
> the “D connector” setup. Go with an SMA ….
>
> Bob
>
> > On Jun 24, 2017, at 7:54 PM, Didier Juges  wrote:
> >
> > I have been forced to use micro-D by a customer on a military power
> supply,
> > not even space rated, it was well over $100 each in 50 piece quantity (I
> > think it was a 25 pin).
> >
> > However, unless they are mistreated (which is easy for the reason you
> > listed), they seem reliable. I do not believe we have replaced one in
> over
> > 400 units shipped and a 15 year period (aside from a couple of prototypes
> > that went through hell). That must be one of our better customers...
> >
> > The design choice of protecting the pin instead of the socket is
> baffling.
> >
> >
> > On Jun 23, 2017 7:03 PM, "jimlux"  wrote:
> >
> > On 6/22/17 4:22 PM, William H. Fite wrote:
> >
> >> A good friend of mine, sadly of blessed memory, was a lead engineer for
> >> Grumman on the comm systems of the lunar lander. He spoke of small
> >> space-rated multi-pin connectors that cost upward of $500 each.
> >>
> >>
> >> The Micro-D is widely used in spaceflight, and is a pox on the connector
> > world - not only are they expensive, the way the pins and jacks are made
> is
> > almost asking for damage - the pin is shrouded in a hole, and the jack is
> > exposed. $100 for a 9 pin wouldn't surprise me.
> >
> > Lately, I've been encountering nano-D (Glenair, Omnetics) - they're not
> as
> > delicate, they're smaller.
> >
> >
> >
> >
> >
> >
> >> On Thursday, June 22, 2017, Arnold Tibus  wrote:
> >>
> >>
> >>> Hello,
> >>>
> >>> 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.
> >>>
> >>
> >
> > AMP (and others) sell a lower cost version called the "Circular Plastic
> > Connector" or CPC. A coarser screw thread than the round metal MS
> > connectors.
> >
> > The round connectors (called Bendix connectors by some at JPL, because,
> of
> > course, that was the mfr for some batch of them) have a nice mil-std to
> > define them.  There's a Shell, an Insert, and pins/jacks.  You can get
> > shells and inserts with different keys and "clocking" to prevent
> mismates.
> > There are coax and triax inserts, high voltage inserts, etc.
> >
> > While they're pricey brand new, there are numerous surplus suppliers
> (Apex
> > Electronics in Sun Valley, CA used to have thousands of them).
> >
> > You can get them hermetic, vacuum tight, waterproof, locking,
> non-locking,
> > every kind dielectric imaginable, etc.
> >
> >
> >
> >
> >
> >
> >
> >>> 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

Re: [time-nuts] Power connectors continued

[Bob kb8tq]

Hi

If you have a phase noise under vibration requirement, you do *not* want to use
the “D connector” setup. Go with an SMA ….

Bob

> On Jun 24, 2017, at 7:54 PM, Didier Juges  wrote:
> 
> I have been forced to use micro-D by a customer on a military power supply,
> not even space rated, it was well over $100 each in 50 piece quantity (I
> think it was a 25 pin).
> 
> However, unless they are mistreated (which is easy for the reason you
> listed), they seem reliable. I do not believe we have replaced one in over
> 400 units shipped and a 15 year period (aside from a couple of prototypes
> that went through hell). That must be one of our better customers...
> 
> The design choice of protecting the pin instead of the socket is baffling.
> 
> 
> On Jun 23, 2017 7:03 PM, "jimlux"  wrote:
> 
> On 6/22/17 4:22 PM, William H. Fite wrote:
> 
>> A good friend of mine, sadly of blessed memory, was a lead engineer for
>> Grumman on the comm systems of the lunar lander. He spoke of small
>> space-rated multi-pin connectors that cost upward of $500 each.
>> 
>> 
>> The Micro-D is widely used in spaceflight, and is a pox on the connector
> world - not only are they expensive, the way the pins and jacks are made is
> almost asking for damage - the pin is shrouded in a hole, and the jack is
> exposed. $100 for a 9 pin wouldn't surprise me.
> 
> Lately, I've been encountering nano-D (Glenair, Omnetics) - they're not as
> delicate, they're smaller.
> 
> 
> 
> 
> 
> 
>> On Thursday, June 22, 2017, Arnold Tibus  wrote:
>> 
>> 
>>> Hello,
>>> 
>>> 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.
>>> 
>> 
> 
> AMP (and others) sell a lower cost version called the "Circular Plastic
> Connector" or CPC. A coarser screw thread than the round metal MS
> connectors.
> 
> The round connectors (called Bendix connectors by some at JPL, because, of
> course, that was the mfr for some batch of them) have a nice mil-std to
> define them.  There's a Shell, an Insert, and pins/jacks.  You can get
> shells and inserts with different keys and "clocking" to prevent mismates.
> There are coax and triax inserts, high voltage inserts, etc.
> 
> While they're pricey brand new, there are numerous surplus suppliers (Apex
> Electronics in Sun Valley, CA used to have thousands of them).
> 
> You can get them hermetic, vacuum tight, waterproof, locking, non-locking,
> every kind dielectric imaginable, etc.
> 
> 
> 
> 
> 
> 
> 
>>> 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 ...
>>> 
>> 
> 
> My problem with D-sub is two fold:
> 1) making a chassis hole is a pain - although now, with places like Front
> Panel Express, it's less so.
> 2) the shroud around the plug/male gender is easy to bend if it gets
> stepped on.  Sure, for flight hardware, carefully handled under the
> watchful eye of QA, not an issue, but I have lots of these from my
> not-entirely-mis-spent youth that are bent.
> 
> They do come with removable pins/jacks, and you can get coax flavors too.
> They're fairly compact in a panel.
> 
> 
> Other connectors of interest 

Re: [time-nuts] Power connectors continued

[Didier Juges]

I have been forced to use micro-D by a customer on a military power supply,
not even space rated, it was well over $100 each in 50 piece quantity (I
think it was a 25 pin).

However, unless they are mistreated (which is easy for the reason you
listed), they seem reliable. I do not believe we have replaced one in over
400 units shipped and a 15 year period (aside from a couple of prototypes
that went through hell). That must be one of our better customers...

The design choice of protecting the pin instead of the socket is baffling.


On Jun 23, 2017 7:03 PM, "jimlux"  wrote:

On 6/22/17 4:22 PM, William H. Fite wrote:

> A good friend of mine, sadly of blessed memory, was a lead engineer for
> Grumman on the comm systems of the lunar lander. He spoke of small
> space-rated multi-pin connectors that cost upward of $500 each.
>
>
> The Micro-D is widely used in spaceflight, and is a pox on the connector
world - not only are they expensive, the way the pins and jacks are made is
almost asking for damage - the pin is shrouded in a hole, and the jack is
exposed. $100 for a 9 pin wouldn't surprise me.

Lately, I've been encountering nano-D (Glenair, Omnetics) - they're not as
delicate, they're smaller.






> On Thursday, June 22, 2017, Arnold Tibus  wrote:
>
>
>> Hello,
>>
>> 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.
>>
>

AMP (and others) sell a lower cost version called the "Circular Plastic
Connector" or CPC. A coarser screw thread than the round metal MS
connectors.

The round connectors (called Bendix connectors by some at JPL, because, of
course, that was the mfr for some batch of them) have a nice mil-std to
define them.  There's a Shell, an Insert, and pins/jacks.  You can get
shells and inserts with different keys and "clocking" to prevent mismates.
There are coax and triax inserts, high voltage inserts, etc.

While they're pricey brand new, there are numerous surplus suppliers (Apex
Electronics in Sun Valley, CA used to have thousands of them).

You can get them hermetic, vacuum tight, waterproof, locking, non-locking,
every kind dielectric imaginable, etc.







>>  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 ...
>>
>

My problem with D-sub is two fold:
1) making a chassis hole is a pain - although now, with places like Front
Panel Express, it's less so.
2) the shroud around the plug/male gender is easy to bend if it gets
stepped on.  Sure, for flight hardware, carefully handled under the
watchful eye of QA, not an issue, but I have lots of these from my
not-entirely-mis-spent youth that are bent.

They do come with removable pins/jacks, and you can get coax flavors too.
They're fairly compact in a panel.


Other connectors of interest are those made by Lemo and Hirose.  Lemo are
locking, pretty rugged when mated, and small for the number of conductors.
You see them on high end video and medical gear.

There's also something about double banana plugs and mating jacks. I go
back and forth between PP and banana plugs for preference.

BTW, there are panel mounts for PP.





___

Re: [time-nuts] Power connectors continued

[Bert Kehren via time-nuts]

This is what we use with good results
Bert Kehren
 
 
In a message dated 6/24/2017 12:03:09 A.M. Eastern Daylight Time,  
csteinm...@yandex.com writes:

Someone  previously mentioned "aviation" style connectors (which many 
will  recognize as mobile microphone connectors) (see graphic below).  I  
switched to these for power and other connections long ago, and have  
been extremely happy with them.

One nice thing about them (IMO) is  that all chassis connectors are male, 
and all cable connectors are female  (unless you use a male in-line 
connector to make an extension  cable).  This means that a dangling cable 
will never have rudely  exposed contacts, and if you are really worried 
you can use vinyl caps to  make sure.  Similarly, the pins on the male 
chassis connectors are  well recessed so it isn't easy to short them, but 
if you want to be sure  you can get screw-on caps (see below).

The contacts have substantial  tension when mating/mated, plus secure 
threaded locking rings.  They  will definitely not work loose.  They will 
handle at least 5A per  pin, and I've seen published ratings of 10A. 
They have good strain  reliefs, too.

They are available in a wide range of pin counts, so it  is easy to make 
sure cables are not cross-compatible.

One really  nice feature is the availability of right-angle in-line 
connectors, to  minimize the space needed behind equipment (this can be 
problematic with  some other connector series).  Use many connectors and 
you will find  that this can be an extremely valuable feature.

On ebay, they are known  as "aviation connectors," and are available in 
three sizes (12mm, 16mm,  and 20mm, according to the diameter of the 
bodies, which is also the hole  size for the chassis-mount connectors). 
Search for GX12, GX16, and  GX20.  I have standardized on the 16mm 
version, but have tried and  can recommend them all.  Shop a little and 
you will find them at very  attractive prices.

I've bought lots of them, from US and foreign  suppliers, and as far as I 
can tell they all come out of the same factory  in China.  All good quality.

Best  regards,

Charles



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Re: [time-nuts] Power connectors continued

[Charles Steinmetz]

Someone previously mentioned "aviation" style connectors (which many 
will recognize as mobile microphone connectors) (see graphic below).  I 
switched to these for power and other connections long ago, and have 
been extremely happy with them.


One nice thing about them (IMO) is that all chassis connectors are male, 
and all cable connectors are female (unless you use a male in-line 
connector to make an extension cable).  This means that a dangling cable 
will never have rudely exposed contacts, and if you are really worried 
you can use vinyl caps to make sure.  Similarly, the pins on the male 
chassis connectors are well recessed so it isn't easy to short them, but 
if you want to be sure you can get screw-on caps (see below).


The contacts have substantial tension when mating/mated, plus secure 
threaded locking rings.  They will definitely not work loose.  They will 
handle at least 5A per pin, and I've seen published ratings of 10A. 
They have good strain reliefs, too.


They are available in a wide range of pin counts, so it is easy to make 
sure cables are not cross-compatible.


One really nice feature is the availability of right-angle in-line 
connectors, to minimize the space needed behind equipment (this can be 
problematic with some other connector series).  Use many connectors and 
you will find that this can be an extremely valuable feature.


On ebay, they are known as "aviation connectors," and are available in 
three sizes (12mm, 16mm, and 20mm, according to the diameter of the 
bodies, which is also the hole size for the chassis-mount connectors). 
Search for GX12, GX16, and GX20.  I have standardized on the 16mm 
version, but have tried and can recommend them all.  Shop a little and 
you will find them at very attractive prices.


I've bought lots of them, from US and foreign suppliers, and as far as I 
can tell they all come out of the same factory in China.  All good quality.


Best regards,

Charles

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Re: [time-nuts] Power connectors continued

[Van Horn, David]

I have a design rule that I've used for decades: "If it fits, it works, or it 
does no harm."


-Original Message-


Why so many connecter types?   So you don't cross stuff up.

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Re: [time-nuts] Power connectors continued

[jimlux]

On 6/22/17 4:22 PM, William H. Fite wrote:

A good friend of mine, sadly of blessed memory, was a lead engineer for
Grumman on the comm systems of the lunar lander. He spoke of small
space-rated multi-pin connectors that cost upward of $500 each.


The Micro-D is widely used in spaceflight, and is a pox on the connector 
world - not only are they expensive, the way the pins and jacks are made 
is almost asking for damage - the pin is shrouded in a hole, and the 
jack is exposed. $100 for a 9 pin wouldn't surprise me.


Lately, I've been encountering nano-D (Glenair, Omnetics) - they're not 
as delicate, they're smaller.







On Thursday, June 22, 2017, Arnold Tibus  wrote:



Hello,

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.



AMP (and others) sell a lower cost version called the "Circular Plastic 
Connector" or CPC. A coarser screw thread than the round metal MS 
connectors.


The round connectors (called Bendix connectors by some at JPL, because, 
of course, that was the mfr for some batch of them) have a nice mil-std 
to define them.  There's a Shell, an Insert, and pins/jacks.  You can 
get shells and inserts with different keys and "clocking" to prevent 
mismates. There are coax and triax inserts, high voltage inserts, etc.


While they're pricey brand new, there are numerous surplus suppliers 
(Apex Electronics in Sun Valley, CA used to have thousands of them).


You can get them hermetic, vacuum tight, waterproof, locking, 
non-locking, every kind dielectric imaginable, etc.








 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 ...



My problem with D-sub is two fold:
1) making a chassis hole is a pain - although now, with places like 
Front Panel Express, it's less so.
2) the shroud around the plug/male gender is easy to bend if it gets 
stepped on.  Sure, for flight hardware, carefully handled under the 
watchful eye of QA, not an issue, but I have lots of these from my 
not-entirely-mis-spent youth that are bent.


They do come with removable pins/jacks, and you can get coax flavors too.
They're fairly compact in a panel.


Other connectors of interest are those made by Lemo and Hirose.  Lemo 
are locking, pretty rugged when mated, and small for the number of 
conductors.  You see them on high end video and medical gear.


There's also something about double banana plugs and mating jacks. I go 
back and forth between PP and banana plugs for preference.


BTW, there are panel mounts for PP.




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Re: [time-nuts] Power connectors continued

[Magnus Danielson]

Hi,

Either that, or make protection schemes to save the day.
If you can't come up with a protection scheme that works, then you need 
to move on to another connector. A crow-bar circuit and a diode for 
reverse-bias and a fuse could probably form sufficient protection.


There is plenty of connectors around, and you can choose unconventional 
use of them.


Cheers,
Magnus

On 06/23/2017 10:08 AM, Michael Wouters wrote:

I've been caught by that one.

Someone used 240V IEC inlets as convenient 10A DC inputs to an oven in an
ion trap. Fiddling around in the back of the racks, I made the inevitable
mistake and Poof! there went $1000 worth of isotopically separated Yb 171.
A few years later, someone else did the same thing.

So yes, follow conventions!

Michael

On Fri, 23 Jun 2017 at 7:35 am, Orin Eman  wrote:


On Thu, Jun 22, 2017 at 1:06 PM, Chris Albertson <
albertson.ch...@gmail.com>
wrote:



A really dumb idea was this guy, I heard this story secondhand.  He used
A/C extension cords for speaker cables because they work well for that
purpose, but then someone plugged a speaker into a 120vac well outlet.

 I

assume it made a load 60 Hz tone for a few cycles.Best to follow
industry conventions because that is what people expect.




 CQ magazine had an article where they did something similar and used a
120V extension cord for low voltage - 12V solar panels or some such
project.  Accidently plug the cord into 120V and you'd blow your panels and
radios up!  I didn't renew my subscription after that one.
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Re: [time-nuts] Power connectors continued

[Michael Wouters]

I've been caught by that one.

Someone used 240V IEC inlets as convenient 10A DC inputs to an oven in an
ion trap. Fiddling around in the back of the racks, I made the inevitable
mistake and Poof! there went $1000 worth of isotopically separated Yb 171.
A few years later, someone else did the same thing.

So yes, follow conventions!

Michael

On Fri, 23 Jun 2017 at 7:35 am, Orin Eman  wrote:

> On Thu, Jun 22, 2017 at 1:06 PM, Chris Albertson <
> albertson.ch...@gmail.com>
> wrote:
>
> >
> > A really dumb idea was this guy, I heard this story secondhand.  He used
> > A/C extension cords for speaker cables because they work well for that
> > purpose, but then someone plugged a speaker into a 120vac well outlet.
>  I
> > assume it made a load 60 Hz tone for a few cycles.Best to follow
> > industry conventions because that is what people expect.
> >
>
>
>  CQ magazine had an article where they did something similar and used a
> 120V extension cord for low voltage - 12V solar panels or some such
> project.  Accidently plug the cord into 120V and you'd blow your panels and
> radios up!  I didn't renew my subscription after that one.
> ___
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> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
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>
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Re: [time-nuts] Power connectors continued

[Bob kb8tq]

Hi

… but not a Cannon connector. If you get those inserts along with a few signal 
leads, they
are up into the $50 to $200 a pair range. They also don’t do terribly well in 
vibration. 

Bob

> On Jun 22, 2017, at 8:34 PM, Arnold Tibus  wrote:
> 
> Bob,
> 
> look to this spec. data from Amphenol found @ Mouser as example:
> 
> Current Rating:
> power Contacts: 55 Amperes (per contact)
> Signal Contacts: 5 Amperes (per contact)
> Contact Resistance:
> Power Contacts: .25 milliohms max
> Signal Contacts: 20 milliohms max
> Insulation Resistance: 5000 Megohms
> DWV: 1500V DC
> Operating Temperature: -40°C to +105°C
> 
> http://www.mouser.com/ds/2/18/LCC17_BRO-44772.pdf
> 
> ok, for shure more expensive (LCC17-A3W3SM-2N0, 
> 
>  $ 9.45 per con. one side, solder connection)
> http://www.mouser.com/ds/2/276/Mixed_Layout-472362.pdf e.g. for crimped 
> contacts
> 
> Not of interest?
> 
> But sorry, even being very interesting, I think we should not stress too much 
> the term 'time' in this discussion here ;-) .
> 
> kind regards
> Arnold, DK2WT
> 
> 
> Am 23.06.2017 um 01:33 schrieb Bob kb8tq:
>> Hi
>> 
>> You can get and use PP’s at 30 to 50A in a 12V circuit without frying them 
>> or the cable they are
>> attached to. Doing the same with a “Cannon” connector is not at all easy 
>> ….You can also bump up
>> to the larger PP’s and get into a couple of hundred amps.
>> 
>> Bob
>> 
>>> On Jun 22, 2017, at 6:54 PM, Arnold Tibus  wrote:
>>> 
>>> 
>>> Hello,
>>> 
>>> 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:
 Hi,
 
 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.
 
 Cheers,
 Magnus
 
 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.
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 

Re: [time-nuts] Power connectors continued

[Brooke Clarke]

Hi:

A few tips on Power Poles.

1. Super Flex wire works very well.  It's typically made of of 44 AWG strands.  For PCB mounting a single strand can be 
used for mechanical rigidity.


2. There's no rule that all the current has to be carried by a single terminal
The M455-1 power supply uses many pins in parallel on the 24 Volt 50 Amp output Amphenol connector where 7 and 8 pins 
are wired in parallel rather than use a connector with a couple of pins rated at 50 or more Amps.

http://www.prc68.com/I/M4551.shtml
3.  Note the "24 Volt" version of the Power Pole connector.

--
Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html

 Original Message 

Bob,

look to this spec. data from Amphenol found @ Mouser as example:

Current Rating:
power Contacts: 55 Amperes (per contact)
Signal Contacts: 5 Amperes (per contact)
Contact Resistance:
Power Contacts: .25 milliohms max
Signal Contacts: 20 milliohms max
Insulation Resistance: 5000 Megohms
DWV: 1500V DC
Operating Temperature: -40°C to +105°C

http://www.mouser.com/ds/2/18/LCC17_BRO-44772.pdf

ok, for shure more expensive (LCC17-A3W3SM-2N0, 
 
$ 9.45 per con. one side, solder connection)

http://www.mouser.com/ds/2/276/Mixed_Layout-472362.pdf e.g. for crimped contacts

Not of interest?

But sorry, even being very interesting, I think we should not stress too much the term 'time' in this discussion here 
;-) .


kind regards
Arnold, DK2WT


Am 23.06.2017 um 01:33 schrieb Bob kb8tq:

Hi

You can get and use PP’s at 30 to 50A in a 12V circuit without frying them or 
the cable they are
attached to. Doing the same with a “Cannon” connector is not at all easy ….You 
can also bump up
to the larger PP’s and get into a couple of hundred amps.

Bob


On Jun 22, 2017, at 6:54 PM, Arnold Tibus  wrote:


Hello,

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:

Hi,

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.

Cheers,
Magnus

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

Re: [time-nuts] Power connectors continued

[Arnold Tibus]

Bob,

look to this spec. data from Amphenol found @ Mouser as example:

Current Rating:
power Contacts: 55 Amperes (per contact)
Signal Contacts: 5 Amperes (per contact)
Contact Resistance:
Power Contacts: .25 milliohms max
Signal Contacts: 20 milliohms max
Insulation Resistance: 5000 Megohms
DWV: 1500V DC
Operating Temperature: -40°C to +105°C

http://www.mouser.com/ds/2/18/LCC17_BRO-44772.pdf

ok, for shure more expensive (LCC17-A3W3SM-2N0, 
 
$ 9.45 per con. one side, solder connection)
http://www.mouser.com/ds/2/276/Mixed_Layout-472362.pdf e.g. for crimped 
contacts


Not of interest?

But sorry, even being very interesting, I think we should not stress too 
much the term 'time' in this discussion here ;-) .


kind regards
Arnold, DK2WT


Am 23.06.2017 um 01:33 schrieb Bob kb8tq:

Hi

You can get and use PP’s at 30 to 50A in a 12V circuit without frying them or 
the cable they are
attached to. Doing the same with a “Cannon” connector is not at all easy ….You 
can also bump up
to the larger PP’s and get into a couple of hundred amps.

Bob


On Jun 22, 2017, at 6:54 PM, Arnold Tibus  wrote:


Hello,

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:

Hi,

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.

Cheers,
Magnus

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

m...@alignedsolutions.com



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Re: [time-nuts] Power connectors continued

[William H. Fite]

A good friend of mine, sadly of blessed memory, was a lead engineer for
Grumman on the comm systems of the lunar lander. He spoke of small
space-rated multi-pin connectors that cost upward of $500 each.



On Thursday, June 22, 2017, Arnold Tibus  wrote:

>
> Hello,
>
> 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:
> > Hi,
> >
> > 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.
> >
> > Cheers,
> > Magnus
> >
> > 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
> >>
> >> m...@alignedsolutions.com 
> >>
> >>
> >>
> >> ___
> >> time-nuts mailing list -- time-nuts@febo.com 
> >> To unsubscribe, go to
> >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> >> and follow the instructions there.
> >>
> > ___
> > time-nuts mailing list -- time-nuts@febo.com 
> > To unsubscribe, go to
> > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> > and follow the instructions there.
>
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>


-- 
William H Fite, PhD
Independent Consultant
Statistical Analysis & Research Methods
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Re: [time-nuts] Power connectors continued

[Mark Spencer]

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. 


Thanks all

Mark Spencer

m...@alignedsolutions.com


> On Jun 22, 2017, at 3:54 PM, Arnold Tibus  wrote:
> 
> 
> Hello,
> 
> 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:
>> Hi,
>> 
>> 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.
>> 
>> Cheers,
>> Magnus
>> 
>>> 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
>>> 
>>> m...@alignedsolutions.com
>>> 
>>> 
>>> 
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Re: [time-nuts] Power connectors continued

[Bob kb8tq]

Hi

You can get and use PP’s at 30 to 50A in a 12V circuit without frying them or 
the cable they are 
attached to. Doing the same with a “Cannon” connector is not at all easy ….You 
can also bump up
to the larger PP’s and get into a couple of hundred amps. 

Bob

> On Jun 22, 2017, at 6:54 PM, Arnold Tibus  wrote:
> 
> 
> Hello,
> 
> 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:
>> Hi,
>> 
>> 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.
>> 
>> Cheers,
>> Magnus
>> 
>> 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
>>> 
>>> m...@alignedsolutions.com
>>> 
>>> 
>>> 
>>> ___
>>> time-nuts mailing list -- time-nuts@febo.com
>>> To unsubscribe, go to
>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>>> and follow the instructions there.
>>> 
>> ___
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>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
> 
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Re: [time-nuts] Power connectors continued

[Arnold Tibus]

Hello,

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:
> Hi,
>
> 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.
>
> Cheers,
> Magnus
>
> 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
>>
>> m...@alignedsolutions.com
>>
>>
>>
>> ___
>> time-nuts mailing list -- time-nuts@febo.com
>> To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>>
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to
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> and follow the instructions there.

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Re: [time-nuts] Power connectors continued

[Bob Bownes]

Keep in mind that there are a large variety of power pole connectors. I first 
encountered them in the cables and connectors used to recharge electric 
forklifts. Plenty big and can handle plenty of power.

> On Jun 22, 2017, at 16:06, Chris Albertson  wrote:
> 
> I think they call these "16mm aviation plugs" in the CNC machine tool
> world.  They are common for connecting servo or stepper motors to their
> controllers.
> 
> they have any number of poles from 2 to 6 or more and screw rings that
> secure them.   Usually really good quality even from Chinese eBay vendors.
> But they are really used only for a cable to chassis and only up to a few
> amps.  here is one
> 
> 
> Why so many connecter types?   So you don't cross stuff up.
> 
> Power poles are great for low-tech 12 volt buss systems that don't need any
> kind of engineering and are tolerant of connecting "anything to anything."
> Amateur radios and lead acid batteries are OK.  Not good for high tech
> battery or their chargers or loads.
> 
> Th XT60 or if you need 90  amps, the XT90 is ok because it is gendered and
> you can't accidentally connect two sources.
> 
> The aviation type are perfect for cabling four or six lead motors.
> 
> I would not use 3-pin XLR for anything but audio.  Don't make it easy to
> connect line level audio to a battery.
> 
> A really dumb idea was this guy, I heard this story secondhand.  He used
> A/C extension cords for speaker cables because they work well for that
> purpose, but then someone plugged a speaker into a 120vac well outlet.   I
> assume it made a load 60 Hz tone for a few cycles.Best to follow
> industry conventions because that is what people expect.
> 
> Even though it would work well electrically, no one uses a mini-USB jack
> for Ethernet and for good reason
> 
> 
> 
> On Thu, Jun 22, 2017 at 11:42 AM, 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
>> 
>> m...@alignedsolutions.com
>> 
>> 
>> ___
>> time-nuts mailing list -- time-nuts@febo.com
>> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
> 
> 
> 
> -- 
> 
> Chris Albertson
> Redondo Beach, California
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Re: [time-nuts] Power connectors continued

[Orin Eman]

On Thu, Jun 22, 2017 at 1:06 PM, Chris Albertson 
wrote:

>
> A really dumb idea was this guy, I heard this story secondhand.  He used
> A/C extension cords for speaker cables because they work well for that
> purpose, but then someone plugged a speaker into a 120vac well outlet.   I
> assume it made a load 60 Hz tone for a few cycles.Best to follow
> industry conventions because that is what people expect.
>


 CQ magazine had an article where they did something similar and used a
120V extension cord for low voltage - 12V solar panels or some such
project.  Accidently plug the cord into 120V and you'd blow your panels and
radios up!  I didn't renew my subscription after that one.
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Re: [time-nuts] Power connectors continued

[Chris Albertson]

I think they call these "16mm aviation plugs" in the CNC machine tool
world.  They are common for connecting servo or stepper motors to their
controllers.

they have any number of poles from 2 to 6 or more and screw rings that
secure them.   Usually really good quality even from Chinese eBay vendors.
But they are really used only for a cable to chassis and only up to a few
amps.  here is one


Why so many connecter types?   So you don't cross stuff up.

Power poles are great for low-tech 12 volt buss systems that don't need any
kind of engineering and are tolerant of connecting "anything to anything."
 Amateur radios and lead acid batteries are OK.  Not good for high tech
battery or their chargers or loads.

Th XT60 or if you need 90  amps, the XT90 is ok because it is gendered and
you can't accidentally connect two sources.

The aviation type are perfect for cabling four or six lead motors.

I would not use 3-pin XLR for anything but audio.  Don't make it easy to
connect line level audio to a battery.

A really dumb idea was this guy, I heard this story secondhand.  He used
A/C extension cords for speaker cables because they work well for that
purpose, but then someone plugged a speaker into a 120vac well outlet.   I
assume it made a load 60 Hz tone for a few cycles.Best to follow
industry conventions because that is what people expect.

Even though it would work well electrically, no one uses a mini-USB jack
for Ethernet and for good reason



On Thu, Jun 22, 2017 at 11:42 AM, 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
>
> m...@alignedsolutions.com
>
>
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.



-- 

Chris Albertson
Redondo Beach, California
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Re: [time-nuts] Power connectors continued

[Mark Spencer]

There seem to be many variations in colloquial naming in different regions and 
industries.   Part of the reason I prefer to deal with local vendors with a 
parts counter is to be able to more or less confirm that connectors match / 
mate properly prior to purchasing them.  

All the best.

Mark Spencer


m...@alignedsolutions.com


> On Jun 22, 2017, at 12:10 PM, Magnus Danielson  
> wrote:
> 
> Hi,
> 
> 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.
> 
> Cheers,
> Magnus
> 
>> 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
>> 
>> m...@alignedsolutions.com
>> 
>> 
>> 
>> ___
>> time-nuts mailing list -- time-nuts@febo.com
>> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
> ___
> time-nuts mailing list -- time-nuts@febo.com
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> and follow the instructions there.
> 
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Re: [time-nuts] Power connectors continued

[Magnus Danielson]

Hi,

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.


Cheers,
Magnus

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

m...@alignedsolutions.com



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