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Andre Majorel · Guest

Manufacturers tend not to give a figure for the number of
insertions their DIN connectors can take. I>ve never seen one
fail but those don>t tend to be the type you plug/unplug ten
times a day. Does anyone have data or experience with that ?

--
André Majorel <URL:http://www.teaser.fr/~amajorel/>
"Buy in bulk, that>s my advice." -- Lemmy

Baron · Guest

Andre Majorel wrote:

[quote]Manufacturers tend not to give a figure for the number of
insertions their DIN connectors can take. I>ve never seen one
fail but those don>t tend to be the type you plug/unplug ten
times a day. Does anyone have data or experience with that ?
[/quote]
Yes I do this far more often ! I>ve yet to have a plug fail, but I have
had the odd socket loose a leg from the mating part. After that all
you can do is replace the socket. Which sadly I>ve had to do several
times. Same with USB sockets. How people manage to break the plastic
tongue off beats me !

--
Best Regards:
Baron.

GMAN · Guest

In article <g5b3oj$1ue$1@aioe.org>, Baron <baron.nospam@linuxmaniac.nospam.net> wrote:
[quote]Andre Majorel wrote:

Manufacturers tend not to give a figure for the number of
insertions their DIN connectors can take. I>ve never seen one
fail but those don>t tend to be the type you plug/unplug ten
times a day. Does anyone have data or experience with that ?

Yes I do this far more often ! I>ve yet to have a plug fail, but I have
had the odd socket loose a leg from the mating part. After that all
you can do is replace the socket. Which sadly I>ve had to do several
times. Same with USB sockets. How people manage to break the plastic
tongue off beats me !

I hate DIN sockets and DC sockets where the only way the socket is anchored is[/quote]
by the solder joint to the board. Why dont more of these use a screw thru the
top to anchor the socket????

Baron · Guest

GMAN wrote:

[quote]In article <g5b3oj$1ue$1@aioe.org>, Baron
baron.nospam@linuxmaniac.nospam.net> wrote:
Andre Majorel wrote:

Manufacturers tend not to give a figure for the number of
insertions their DIN connectors can take. I>ve never seen one
fail but those don>t tend to be the type you plug/unplug ten
times a day. Does anyone have data or experience with that ?

Yes I do this far more often ! I>ve yet to have a plug fail, but I
have
had the odd socket loose a leg from the mating part. After that all
you can do is replace the socket. Which sadly I>ve had to do several
times. Same with USB sockets. How people manage to break the plastic
tongue off beats me !

I hate DIN sockets and DC sockets where the only way the socket is
anchored is by the solder joint to the board. Why dont more of these
use a screw thru the top to anchor the socket????
[/quote]
Replacing the DC socket on a PCB is easy compared to the USB and Dual
Mini DIN ones. Although I have seen the DC sockets with a metal shroud
over them that is soldered to the board ! They are a lot more robust.
Its usually the pin that breaks off though.

--
Best Regards:
Baron.

Andre Majorel · Guest

On 2008-07-12, Baron <baron.nospam@linuxmaniac.nospam.net> wrote:
[quote]Andre Majorel wrote:

Manufacturers tend not to give a figure for the number of
insertions their DIN connectors can take. I>ve never seen one
fail but those don>t tend to be the type you plug/unplug ten
times a day. Does anyone have data or experience with that ?

Yes I do this far more often ! I>ve yet to have a plug fail,
but I have had the odd socket loose a leg from the mating
part. After that all you can do is replace the socket. Which
sadly I>ve had to do several times.
[/quote]
I see, thanks. I>m after an 8- or 9-way connector for a home
brewed polyphonic modular synth. Frequencies involved are DC to
20 kHz, 30 Vpp, input impedances on the order of 100 k.

Modular connectors (RJ45-style) have for them low cost and the
availability of pre-made patch cords. But when life expectancy
is specified, it is very low, on the order of dozens of cycles.

High quality DE-9 are available but even the Canon ones are only
spec>d to a few hundred insertions at most. And there is the
problem of making a D-shaped hole in the panel.

It better be a low-cost part because I>ll need several hundreds.
In itself, replacing a panel connector is not a big deal if
there is a wire-to-board connector behind it. The problem is
that spotting one bad contact can take a while.

--
André Majorel <URL:http://www.teaser.fr/~amajorel/>
"Buy in bulk, that>s my advice." -- Lemmy

Baron · Guest

Andre Majorel wrote:

[quote]On 2008-07-12, Baron <baron.nospam@linuxmaniac.nospam.net> wrote:
Andre Majorel wrote:

Manufacturers tend not to give a figure for the number of
insertions their DIN connectors can take. I>ve never seen one
fail but those don>t tend to be the type you plug/unplug ten
times a day. Does anyone have data or experience with that ?

Yes I do this far more often ! I>ve yet to have a plug fail,
but I have had the odd socket loose a leg from the mating
part. After that all you can do is replace the socket. Which
sadly I>ve had to do several times.

I see, thanks. I>m after an 8- or 9-way connector for a home
brewed polyphonic modular synth. Frequencies involved are DC to
20 kHz, 30 Vpp, input impedances on the order of 100 k.
[/quote]
The frequencies are not a problem for the mini DIN and I doubt that the
natural impedance is either !

[quote]Modular connectors (RJ45-style) have for them low cost and the
availability of pre-made patch cords. But when life expectancy
is specified, it is very low, on the order of dozens of cycles.
[/quote]
AFAIW the mini DIN is similar ! Just a few hundred !

[quote]High quality DE-9 are available but even the Canon ones are only
spec>d to a few hundred insertions at most. And there is the
problem of making a D-shaped hole in the panel.
[/quote]
Their expensive and the punch for the hole is around Â£25 !

[quote]It better be a low-cost part because I>ll need several hundreds.
[/quote]
Most if not all low cost connectors don>t have high make/break
lifetimes !

[quote]In itself, replacing a panel connector is not a big deal if
there is a wire-to-board connector behind it. The problem is
that spotting one bad contact can take a while.

[/quote]
Wouldn>t it be prudent to have a chat with somebody like AMP>s tech
support people. Quite a while back I needed a high voltage connector
5.5Kv and they were very helpful.

--
Best Regards:
Baron.

Andre Majorel · Guest

On 2008-07-19, Baron <baron.nospam@linuxmaniac.nospam.net> wrote:
[quote]Andre Majorel wrote:
On 2008-07-12, Baron <baron.nospam@linuxmaniac.nospam.net> wrote:
Andre Majorel wrote:

Manufacturers tend not to give a figure for the number of
insertions their DIN connectors can take. I>ve never seen one
fail but those don>t tend to be the type you plug/unplug ten
times a day. Does anyone have data or experience with that ?

Yes I do this far more often ! I>ve yet to have a plug fail,
but I have had the odd socket loose a leg from the mating
part. After that all you can do is replace the socket. Which
sadly I>ve had to do several times.

I see, thanks. I>m after an 8- or 9-way connector for a home
brewed polyphonic modular synth. Frequencies involved are DC to
20 kHz, 30 Vpp, input impedances on the order of 100 k.

The frequencies are not a problem for the mini DIN and I doubt
that the natural impedance is either !
[/quote]
That was my way of saying that the currents involved are on the
order of 0.1 mA so a very low contact resistance is not needed.

[quote]Modular connectors (RJ45-style) have for them low cost and the
availability of pre-made patch cords. But when life expectancy
is specified, it is very low, on the order of dozens of cycles.

AFAIW the mini DIN is similar ! Just a few hundred !
[/quote]
I was afraid of that...

[quote]High quality DE-9 are available but even the Canon ones are only
spec>d to a few hundred insertions at most. And there is the
problem of making a D-shaped hole in the panel.

Their expensive and the punch for the hole is around £25 !
[/quote]
Yes, and punching a hole with a hand punch and die is rather
time consuming in my experience.

[quote]It better be a low-cost part because I>ll need several hundreds.

Most if not all low cost connectors don>t have high make/break
lifetimes !
[/quote]
With the notable exception of 1/4" phone jacks. I need an 8-way
1/4" phone jack. :-)

[quote]In itself, replacing a panel connector is not a big deal if
there is a wire-to-board connector behind it. The problem is
that spotting one bad contact can take a while.

Wouldn>t it be prudent to have a chat with somebody like AMP>s
tech support people. Quite a while back I needed a high
voltage connector 5.5Kv and they were very helpful.
[/quote]
Good idea, thanks.

--
André Majorel <URL:http://www.teaser.fr/~amajorel/>
"Buy in bulk, that>s my advice." -- Lemmy

Baron · Guest

Andre Majorel Inscribed thus:

[quote]On 2008-07-19, Baron <baron.nospam@linuxmaniac.nospam.net> wrote:
Andre Majorel wrote:
On 2008-07-12, Baron <baron.nospam@linuxmaniac.nospam.net> wrote:
Andre Majorel wrote:

Manufacturers tend not to give a figure for the number of
insertions their DIN connectors can take. I>ve never seen one
fail but those don>t tend to be the type you plug/unplug ten
times a day. Does anyone have data or experience with that ?

Yes I do this far more often ! I>ve yet to have a plug fail,
but I have had the odd socket loose a leg from the mating
part. After that all you can do is replace the socket. Which
sadly I>ve had to do several times.

I see, thanks. I>m after an 8- or 9-way connector for a home
brewed polyphonic modular synth. Frequencies involved are DC to
20 kHz, 30 Vpp, input impedances on the order of 100 k.

The frequencies are not a problem for the mini DIN and I doubt
that the natural impedance is either !

That was my way of saying that the currents involved are on the
order of 0.1 mA so a very low contact resistance is not needed.
[/quote]
With very low currents I would have thought that you would need a low
contact resistance and probably gold plating as well.

[quote]Modular connectors (RJ45-style) have for them low cost and the
availability of pre-made patch cords. But when life expectancy
is specified, it is very low, on the order of dozens of cycles.

AFAIW the mini DIN is similar ! Just a few hundred !

I was afraid of that...

High quality DE-9 are available but even the Canon ones are only
spec>d to a few hundred insertions at most. And there is the
problem of making a D-shaped hole in the panel.

Their expensive and the punch for the hole is around Â£25 !

Yes, and punching a hole with a hand punch and die is rather
time consuming in my experience.
[/quote]
Yes I agree it can be. I used to have a bench press that I used for
punching chassis. It took more time jigging up or drilling pilot hoes
to accurately locate the punch than it was worth.

[quote]It better be a low-cost part because I>ll need several hundreds.

Most if not all low cost connectors don>t have high make/break
lifetimes !

With the notable exception of 1/4" phone jacks. I need an 8-way
1/4" phone jack. :-)
[/quote]
I>ve see six pole post office type jacks ! But I wouldn>t like to have
to buy any. They must have cost the post office a fortune.

[quote]In itself, replacing a panel connector is not a big deal if
there is a wire-to-board connector behind it. The problem is
that spotting one bad contact can take a while.
[/quote]
You could always make a test jig for that job.

[quote]Wouldn>t it be prudent to have a chat with somebody like AMP>s
tech support people. Quite a while back I needed a high
voltage connector 5.5Kv and they were very helpful.

Good idea, thanks.

[/quote]
Let me know how you get on.

--
Best Reagrds:
Baron.

Andre Majorel · Guest

On 2008-07-23, Baron <baron.nospam@linuxmaniac.nospam.net> wrote:
[quote]Andre Majorel Inscribed thus:
On 2008-07-19, Baron <baron.nospam@linuxmaniac.nospam.net> wrote:
Andre Majorel wrote:

I>m after an 8- or 9-way connector for a home brewed
polyphonic modular synth. Frequencies involved are DC to 20
kHz, 30 Vpp, input impedances on the order of 100 k.

The frequencies are not a problem for the mini DIN and I doubt
that the natural impedance is either !

That was my way of saying that the currents involved are on the
order of 0.1 mA so a very low contact resistance is not needed.

With very low currents I would have thought that you would need a low
contact resistance and probably gold plating as well.
[/quote]
My possibly naive thinking was that with so little current,
you wouldn>t need a super-low contact resistance to achieve
low voltage drop and low dissipated power. What am I missing ?

[quote]It better be a low-cost part because I>ll need several hundreds.

Most if not all low cost connectors don>t have high make/break
lifetimes !

With the notable exception of 1/4" phone jacks. I need an 8-way
1/4" phone jack. :-)

I>ve see six pole post office type jacks ! But I wouldn>t
like to have to buy any. They must have cost the post office
a fortune.
[/quote]
Apple used a 4-way jack in one of their insanely great projects.

Let me guess... Single-sourced from a factory in Taiwan that
won>t even speak to you unless you need 10,000 a month... :-D

[quote]In itself, replacing a panel connector is not a big deal if
there is a wire-to-board connector behind it. The problem is
that spotting one bad contact can take a while.

You could always make a test jig for that job.
[/quote]
from your description of the failure mode (one branch of the
fork breaking), regular visual inspection would be the fastest
method.

[quote]Wouldn>t it be prudent to have a chat with somebody like AMP>s
tech support people. Quite a while back I needed a high
voltage connector 5.5Kv and they were very helpful.

Good idea, thanks.

Let me know how you get on.
[/quote]
Will do, if/when I get around to building *that* pyramid.

--
André Majorel <URL:http://www.teaser.fr/~amajorel/>
"Buy in bulk, that>s my advice." -- Lemmy

Baron · Guest

Andre Majorel wrote:

[quote]On 2008-07-23, Baron <baron.nospam@linuxmaniac.nospam.net> wrote:
Andre Majorel Inscribed thus:
On 2008-07-19, Baron <baron.nospam@linuxmaniac.nospam.net> wrote:
Andre Majorel wrote:

I>m after an 8- or 9-way connector for a home brewed
polyphonic modular synth. Frequencies involved are DC to 20
kHz, 30 Vpp, input impedances on the order of 100 k.

The frequencies are not a problem for the mini DIN and I doubt
that the natural impedance is either !

That was my way of saying that the currents involved are on the
order of 0.1 mA so a very low contact resistance is not needed.

With very low currents I would have thought that you would need a low
contact resistance and probably gold plating as well.

My possibly naive thinking was that with so little current,
you wouldn>t need a super-low contact resistance to achieve
low voltage drop and low dissipated power. What am I missing ?
[/quote]
Noise ! This is a potential problem with any connectors particularly in
audio circuits.

[quote]It better be a low-cost part because I>ll need several hundreds.

Most if not all low cost connectors don>t have high make/break
lifetimes !

With the notable exception of 1/4" phone jacks. I need an 8-way
1/4" phone jack. :-)

I>ve see six pole post office type jacks ! But I wouldn>t
like to have to buy any. They must have cost the post office
a fortune.

Apple used a 4-way jack in one of their insanely great projects.

Let me guess... Single-sourced from a factory in Taiwan that
won>t even speak to you unless you need 10,000 a month... :-D
[/quote]
Quite probably !

[quote]In itself, replacing a panel connector is not a big deal if
there is a wire-to-board connector behind it. The problem is
that spotting one bad contact can take a while.

You could always make a test jig for that job.

from your description of the failure mode (one branch of the
fork breaking), regular visual inspection would be the fastest
method.
[/quote]
Yes I agree it probably would. I have to use a big magnifying glass to
see the ends of the tines. The other thing that I see quite often is
the someone has stood on the plug and bent the shroud and sometimes one
or two of the pins. (usually keyboards and mice)

Along similar lines I had a client this morning with a broken USB
connector on his computer. Now how on earth do you manage to break off
the white plastic bit that supports the contacts ? Fortunately its on
the front panel, so its not as time consuming a repair as replacing a
motherboard one.

--
Best Regards:
Baron.


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