Reply
 
Thread Tools Display Modes
  #1   Report Post  
Hal Laurent
 
Posts: n/a
Default History of XLR gender convention

One of my neighbors called me yesterday, asking if I could help the local
elementary school with their announcement microphone, which had "broken".
I said "sure, I'll take a look". It turned out the plug had come off the
end of the microphone cable, so I took it home and soldered it back on.

Testing the microphone (a Telex 253 if anyone cares) at home was a bit of an
adventure, as it had a female XLR on the output plug rather than the usual
male XLR, so I had to cobble up an adaptor.

Which brings me to my question...when did the current convention of female
XLRs on inputs and male on outputs start? Is this a relatively recent
thing, or is the equipment at this school really, really old?

Hal Laurent
Baltimore


  #2   Report Post  
Frank Stearns
 
Posts: n/a
Default

"Hal Laurent" writes:

One of my neighbors called me yesterday, asking if I could help the local
elementary school with their announcement microphone, which had "broken".
I said "sure, I'll take a look". It turned out the plug had come off the
end of the microphone cable, so I took it home and soldered it back on.


Testing the microphone (a Telex 253 if anyone cares) at home was a bit of an
adventure, as it had a female XLR on the output plug rather than the usual
male XLR, so I had to cobble up an adaptor.


Which brings me to my question...when did the current convention of female
XLRs on inputs and male on outputs start? Is this a relatively recent
thing, or is the equipment at this school really, really old?


Someone will answer this with more knowledge than me; I seem to remember
someone saying something about old tv news mag stripe film cameras always
coming with males for the mic in, so every thing was female on the cables.

I also suspect that as phantom became more wide spread there might have
been a moderate safety issue about not having exposed and juiced male
pins on the wall where little fingers could jab in there and get a tickle.
Purely a guess.

Frank
Mobile Audio

--
  #3   Report Post  
Phil Allison
 
Posts: n/a
Default


"Hal Laurent"

One of my neighbors called me yesterday, asking if I could help the local
elementary school with their announcement microphone, which had "broken".
I said "sure, I'll take a look". It turned out the plug had come off the
end of the microphone cable, so I took it home and soldered it back on.

Testing the microphone (a Telex 253 if anyone cares) at home was a bit of
an adventure, as it had a female XLR on the output plug rather than the
usual male XLR, so I had to cobble up an adaptor.

Which brings me to my question...when did the current convention of female
XLRs on inputs and male on outputs start? Is this a relatively recent
thing, or is the equipment at this school really, really old?



** The convention dates from the appearance of microphones with male XLR
sockets in the base of the handle - by around 1970 this style became
commonplace ( with Shure, Sennheiser and AKG models) and then very soon was
dominant. Mixer inputs were commonly male XLR sockets prior to that and mic
leads had a variety of connectors at the mic end or even no connector at all
with budget models.

Making mic and other long leads with males at one end and females at the
other is pure common sense - since it allows such leads to be chained. So
mixer makers soon accommodated this.




.............. Phil


  #4   Report Post  
play on
 
Posts: n/a
Default

I always figured it was simple... the pins point in the direction of
the signal flow, the female receives...

Al

On Wed, 23 Mar 2005 04:21:37 -0000, Frank Stearns
wrote:

"Hal Laurent" writes:

One of my neighbors called me yesterday, asking if I could help the local
elementary school with their announcement microphone, which had "broken".
I said "sure, I'll take a look". It turned out the plug had come off the
end of the microphone cable, so I took it home and soldered it back on.


Testing the microphone (a Telex 253 if anyone cares) at home was a bit of an
adventure, as it had a female XLR on the output plug rather than the usual
male XLR, so I had to cobble up an adaptor.


Which brings me to my question...when did the current convention of female
XLRs on inputs and male on outputs start? Is this a relatively recent
thing, or is the equipment at this school really, really old?


Someone will answer this with more knowledge than me; I seem to remember
someone saying something about old tv news mag stripe film cameras always
coming with males for the mic in, so every thing was female on the cables.

I also suspect that as phantom became more wide spread there might have
been a moderate safety issue about not having exposed and juiced male
pins on the wall where little fingers could jab in there and get a tickle.
Purely a guess.

Frank
Mobile Audio


  #5   Report Post  
Logan Shaw
 
Posts: n/a
Default

play on wrote:
I always figured it was simple... the pins point in the direction of
the signal flow, the female receives...


So phantom power is for people who are into female domination and/or
role reversal?

- Logan


  #6   Report Post  
William Sommerwerck
 
Posts: n/a
Default

When I worked for Bendix Field Engineering, I learned that government
electronics used the opposite convention. A "goesinta" is male, a "comesouta" is
female.

The reason for this is that connectors often carry line or higher voltages. You
don't want the outputs to have male pins that can be easily touched or shorted.

  #7   Report Post  
Geoff Wood
 
Posts: n/a
Default


"Hal Laurent" wrote in message
news

Which brings me to my question...when did the current convention of female
XLRs on inputs and male on outputs start? Is this a relatively recent
thing, or is the equipment at this school really, really old?



As long as I can remember I've always understood the convention to be "the
signal flow goes in the direction of the pins".


geoff


  #8   Report Post  
Scott Dorsey
 
Posts: n/a
Default

Hal Laurent wrote:

Which brings me to my question...when did the current convention of female
XLRs on inputs and male on outputs start? Is this a relatively recent
thing, or is the equipment at this school really, really old?


The installed sound guys have done the female-female thing for years.
At least in the 1950s it was popular, and you will still see it on
most hotel and conference systems today. It means the cables can be
unwound from either end and are less likely to get stolen.
--scott


--
"C'est un Nagra. C'est suisse, et tres, tres precis."
  #9   Report Post  
Scott Dorsey
 
Posts: n/a
Default

In article ,
William Sommerwerck wrote:
When I worked for Bendix Field Engineering, I learned that government
electronics used the opposite convention. A "goesinta" is male, a "comesouta" is
female.

The reason for this is that connectors often carry line or higher voltages. You
don't want the outputs to have male pins that can be easily touched or shorted.


Right, and the most common connector around, the lowly Edison household
power plug, is configured this way.

A cable with two male Edisons, used to backhaul power into a service from
an outlet in emergencies, is called a suicide cord. This is because
if you plug just one end in, you have two live prongs sticking out on
the other end.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."
  #10   Report Post  
 
Posts: n/a
Default


Hal Laurent wrote:

Which brings me to my question...when did the current convention of

female
XLRs on inputs and male on outputs start? Is this a relatively

recent
thing, or is the equipment at this school really, really old?

Hal Laurent
Baltimore



It is essential to sound reproduction. ;-)

Peter



  #13   Report Post  
Charles Krug
 
Posts: n/a
Default

On Tue, 22 Mar 2005 21:49:59 -0500, Hal Laurent
wrote:
One of my neighbors called me yesterday, asking if I could help the local
elementary school with their announcement microphone, which had "broken".
I said "sure, I'll take a look". It turned out the plug had come off the
end of the microphone cable, so I took it home and soldered it back on.

Testing the microphone (a Telex 253 if anyone cares) at home was a bit of an
adventure, as it had a female XLR on the output plug rather than the usual
male XLR, so I had to cobble up an adaptor.


I've only seen these a few times, always in "Institutional Use" . . .
places with many people and not so good security.

I always assumed it was done to discourage theft.

  #14   Report Post  
Jim Gregory
 
Posts: n/a
Default

Sounds like the institutionalists used a tradeperson to install something
akin to electrical fittings but whose emerging codes of practice were really
alien to them. Yet these were understood within the domain of trained
PA/Audio specialists whom they did not know existed or could not employ
justifiably, ie, resulting in an incompatible though working botch. The
anti-theft benefits are a pure spin-off.


  #15   Report Post  
S O'Neill
 
Posts: n/a
Default

Logan Shaw wrote:

play on wrote:

I always figured it was simple... the pins point in the direction of
the signal flow, the female receives...



So phantom power is for people who are into female domination and/or
role reversal?



Not people, ectoplasmic beings.


  #16   Report Post  
S O'Neill
 
Posts: n/a
Default

Jim Gregory wrote:

Sounds like the institutionalists used a tradeperson to install something
akin to electrical fittings but whose emerging codes of practice were really
alien to them. Yet these were understood within the domain of trained
PA/Audio specialists whom they did not know existed or could not employ
justifiably, ie, resulting in an incompatible though working botch. The
anti-theft benefits are a pure spin-off.



They may also have figured it would be easier to clean out a male XLR
buried under years of schmutz that collected in that hole in the gym floor.

  #17   Report Post  
Jim Gregory
 
Posts: n/a
Default

You hopefully mean "it would be more difficult...."
And don't overlook decorators and painters that found it simpler to daub
than to bypass a delicate area feature just to keep the latest colour scheme
uniform!


  #18   Report Post  
S O'Neill
 
Posts: n/a
Default

Jim Gregory wrote:
You hopefully mean "it would be more difficult...."



You have a hole in the floor with pins, not a three-hole connector with
a surrounding groove and a latch mechanism. Therefore, easier to clean.
  #20   Report Post  
Hans van Dongen
 
Posts: n/a
Default

Mike Rivers wrote:


I used to borrow a Nagra III recorder on a fairly regular basis, and
that had a male mic connector. Nothing cheap about that, it was a
matter of size.


Could this be a Europe / US thing? The nagra 4s with NAB eq came
standard with female mic connectors, while the CCIR came with male.
I was told by a NOB (the former dutch state broadcast facility company)
employee that they wire every device to have male connectors, and every
cable with both ends female, for the reason already mentioned elsewhe
if you have a 3000 ft cable just rolled out, you don't want to find out
it's the wrong way around.

Hans
--




This is a non-profit organization;
we didn't plan it that way, but it is

=====================================


(remove uppercase trap, and double the number to reply)


  #21   Report Post  
Geoff Wood
 
Posts: n/a
Default


"Scott Dorsey" wrote in message news:d1rtn2


The installed sound guys have done the female-female thing for years.
At least in the 1950s it was popular, and you will still see it on
most hotel and conference systems today. It means the cables can be
unwound from either end and are less likely to get stolen.


Na, they get stolen just the same. Then they get dumped when the theif
realises.


geoff


  #23   Report Post  
Jim Gregory
 
Posts: n/a
Default

After all the dutiful adherence to XLR gender convention all my audio
engineering life, in studios, on dozens of international multi-broadcaster
OBs and in theatres, a lot of the stuff I have read today on this topic,
including the last bit from Hans, tells me lots of folk hardly cared
professionally about this as long as their linkage job was made easier -- so
I suppose it should have been threaded in rec.audio.opinion.


  #26   Report Post  
Hans van Dongen
 
Posts: n/a
Default

play on wrote:

I always make sure the knob is
on zero and the wires are on the speaker terminals before I turn the
thing on...

Al


Famous last words.....

Hans
--




This is a non-profit organization;
we didn't plan it that way, but it is

=====================================


(remove uppercase trap, and double the number to reply)
  #27   Report Post  
William Sommerwerck
 
Posts: n/a
Default

A cable with two male Edisons, used to backhaul power into a service from
an outlet in emergencies, is called a suicide cord. This is because if you
plug just one end in, you have two live prongs sticking out on the other end.


Not if you plug the cable into the "destination" first.
  #28   Report Post  
Mike T.
 
Posts: n/a
Default

On Tue, 22 Mar 2005 21:49:59 -0500, "Hal Laurent"
wrote:

One of my neighbors called me yesterday, asking if I could help the local
elementary school with their announcement microphone, which had "broken".
I said "sure, I'll take a look". It turned out the plug had come off the
end of the microphone cable, so I took it home and soldered it back on.

Testing the microphone (a Telex 253 if anyone cares) at home was a bit of an
adventure, as it had a female XLR on the output plug rather than the usual
male XLR, so I had to cobble up an adaptor.

Which brings me to my question...when did the current convention of female
XLRs on inputs and male on outputs start? Is this a relatively recent
thing, or is the equipment at this school really, really old?

Hal Laurent
Baltimore

Well, I heard a different story when I was growing up in this
business. Here's the way it went:

Most professional recording and broadcast mics had male connectors on
them: UA (for United Artists), type P (for Paramount Studios), or
Tuchel (for anything German). Then Cannon introduce the new, miniature
XLR connector. Still, mics had male connectors and the inputs to
preamps were female, because if you used a male connector with exposed
pins for a mic level input, it put one hell of a nasty hum into the
system when somebody touched one of the exposed pins. This was even
before +48V phantom power became a standard, so exposed voltage was
not a consideration.

Non-pro microphones used high-impedance unbalanced connections with
various connectors, including a Amphenol coaxial with screw sleeve.
This is why microphones like the EV 664 had an impedance switch.

But a US company called Bogen decided to use balanced low-impedance
microphone inputs on their PA systems for schools. However, after
spending all that money on input transformers for their tube preamp
circuit, they didn't like the cost of the female XLR panel-mount
connector. The males XLRs were cheaper, and schools (even then) always
bought from the lowest bidder, so that's what they used, and they were
the first manufacturer of school PA systems with balanced mic inputs.
Male XLR became the new standard for the mic inputs of school PA
systems, and other manufacturers went along with it, including Dukane
and University. Movie and recording studios still used female XLR for
mic inputs. Many adapter cables were made. School PA mic cables always
had female XLR connectors on both ends.

And that's the story they told me, back when dinosaurs roamed and the
EV 666 was the mic of choice for PA.

Mike T.

  #30   Report Post  
Geoff Wood
 
Posts: n/a
Default


"Mike Rivers" wrote in message

Around here, a "suicide cord" is a cable with an AC plug on one end
and alligator clips on the other. Useful for getting power to things
on the bench for which you don't have a matching power cable.


The aligator clips are easier to attach to George W Bush's scrotum, to see
if there really is more than 5% brain function. Mind you, that's reputedly
the area where most of the function would concentrate, apart from the nasal
membranes.

geoff




  #31   Report Post  
SSJVCmag
 
Posts: n/a
Default

Nobody wants to steal double-male mic cables.
It's a STUPID thing and hotels and institutuional installs stopped doing it
decades ago on the whole due to client rants.


On 3/22/05 9:49 PM, in article , "Hal Laurent"
wrote:

One of my neighbors called me yesterday, asking if I could help the local
elementary school with their announcement microphone, which had "broken".
I said "sure, I'll take a look". It turned out the plug had come off the
end of the microphone cable, so I took it home and soldered it back on.

Testing the microphone (a Telex 253 if anyone cares) at home was a bit of an
adventure, as it had a female XLR on the output plug rather than the usual
male XLR, so I had to cobble up an adaptor.

Which brings me to my question...when did the current convention of female
XLRs on inputs and male on outputs start? Is this a relatively recent
thing, or is the equipment at this school really, really old?

Hal Laurent
Baltimore



  #32   Report Post  
Charles Krug
 
Posts: n/a
Default

On Thu, 24 Mar 2005 06:13:38 GMT, Mike T wrote:
On Tue, 22 Mar 2005 21:49:59 -0500, "Hal Laurent"
wrote:

One of my neighbors called me yesterday, asking if I could help the local
elementary school with their announcement microphone, which had "broken".
I said "sure, I'll take a look". It turned out the plug had come off the
end of the microphone cable, so I took it home and soldered it back on.

Testing the microphone (a Telex 253 if anyone cares) at home was a bit of an
adventure, as it had a female XLR on the output plug rather than the usual
male XLR, so I had to cobble up an adaptor.

Which brings me to my question...when did the current convention of female
XLRs on inputs and male on outputs start? Is this a relatively recent
thing, or is the equipment at this school really, really old?

Hal Laurent
Baltimore

Well, I heard a different story when I was growing up in this
business. Here's the way it went:

Most professional recording and broadcast mics had male connectors on
them: UA (for United Artists), type P (for Paramount Studios), or
Tuchel (for anything German). Then Cannon introduce the new, miniature
XLR connector. Still, mics had male connectors and the inputs to
preamps were female, because if you used a male connector with exposed
pins for a mic level input, it put one hell of a nasty hum into the
system when somebody touched one of the exposed pins. This was even
before +48V phantom power became a standard, so exposed voltage was
not a consideration.


WAY back when I was in my first years of elementary school, we ate lunch
in the "Multipurpose Room" . . you know . .that gym that architetects
try to pawn off as "You don't NEED an auditorium . . . "

ANYWHO, anyone who got out of control got to "stand by himself" . .
nowadays they'd call it a "Timeout" but back then they imagined it was
punishment to be dragged to the front of the room so that all your peers
could see the Cool Kid . . . but I digress.

"Timeout" was always in front of the stage, where there was, at
convenient kid level, a mic input to the building sound system.

For reasons probably fathomed only by the administration, this input was
ALWAYS live. I'd wager no one knew how to turn it on or off so they
left it on so it would be available for the next PTO meeting. Clever
kids being clever kids, it took us about half a second to realize that
by sticking your finger in the mic input when the monitor wasn't
watching, you could generate a LOUDLOUDLOUDLOUDLOUDLOUD HUMMMMMMMMMMM.

But still they persisted in thinking sending us to stand there was
"punishment." Go fig.

  #34   Report Post  
Willie K.Yee, M.D.
 
Posts: n/a
Default

If anyone is paying attention, this post actually contains the answer
to the question.

Carry on.

On Thu, 24 Mar 2005 06:13:38 GMT, Mike T. wrote:

On Tue, 22 Mar 2005 21:49:59 -0500, "Hal Laurent"
wrote:

One of my neighbors called me yesterday, asking if I could help the local
elementary school with their announcement microphone, which had "broken".
I said "sure, I'll take a look". It turned out the plug had come off the
end of the microphone cable, so I took it home and soldered it back on.

Testing the microphone (a Telex 253 if anyone cares) at home was a bit of an
adventure, as it had a female XLR on the output plug rather than the usual
male XLR, so I had to cobble up an adaptor.

Which brings me to my question...when did the current convention of female
XLRs on inputs and male on outputs start? Is this a relatively recent
thing, or is the equipment at this school really, really old?

Hal Laurent
Baltimore

Well, I heard a different story when I was growing up in this
business. Here's the way it went:

Most professional recording and broadcast mics had male connectors on
them: UA (for United Artists), type P (for Paramount Studios), or
Tuchel (for anything German). Then Cannon introduce the new, miniature
XLR connector. Still, mics had male connectors and the inputs to
preamps were female, because if you used a male connector with exposed
pins for a mic level input, it put one hell of a nasty hum into the
system when somebody touched one of the exposed pins. This was even
before +48V phantom power became a standard, so exposed voltage was
not a consideration.

Non-pro microphones used high-impedance unbalanced connections with
various connectors, including a Amphenol coaxial with screw sleeve.
This is why microphones like the EV 664 had an impedance switch.

But a US company called Bogen decided to use balanced low-impedance
microphone inputs on their PA systems for schools. However, after
spending all that money on input transformers for their tube preamp
circuit, they didn't like the cost of the female XLR panel-mount
connector. The males XLRs were cheaper, and schools (even then) always
bought from the lowest bidder, so that's what they used, and they were
the first manufacturer of school PA systems with balanced mic inputs.
Male XLR became the new standard for the mic inputs of school PA
systems, and other manufacturers went along with it, including Dukane
and University. Movie and recording studios still used female XLR for
mic inputs. Many adapter cables were made. School PA mic cables always
had female XLR connectors on both ends.

And that's the story they told me, back when dinosaurs roamed and the
EV 666 was the mic of choice for PA.

Mike T.


Willie K. Yee, M.D. http://users.bestweb.net/~wkyee
Developer of Problem Knowledge Couplers for Psychiatry http://www.pkc.com
Webmaster and Guitarist for the Big Blue Big Band http://www.bigbluebigband.org

  #35   Report Post  
Phil Allison
 
Posts: n/a
Default


"Willie K.Yee, M.D

If anyone is paying attention, this post actually contains the answer
to the question.



** How the hell would YOU know ?????





............. Phil




  #36   Report Post  
Willie K.Yee, M.D.
 
Posts: n/a
Default


FINALLY !!! FINALLY !!!FINALLY !!!

I have been RECOGNIZED!!!

The Phil has deigned to dope-slap me with one of his inane adolescent
hostile comments!!

I was beginning to feel a bit inferior.

Or maybe it was because he knows I am a shrink and can comprehend the
depth of his psychopathology.

Doesn't matter now. I am up to date with the elite of R.A.P.


On Fri, 25 Mar 2005 11:47:56 +1100, "Phil Allison"
wrote:


"Willie K.Yee, M.D

If anyone is paying attention, this post actually contains the answer
to the question.



** How the hell would YOU know ?????





............ Phil



Willie K. Yee, M.D. http://users.bestweb.net/~wkyee
Developer of Problem Knowledge Couplers for Psychiatry http://www.pkc.com
Webmaster and Guitarist for the Big Blue Big Band http://www.bigbluebigband.org

  #37   Report Post  
hank alrich
 
Posts: n/a
Default

Willie K.Yee, M.D. wrote:

FINALLY !!! FINALLY !!!FINALLY !!!


I have been RECOGNIZED!!!


The Phil has deigned to dope-slap me with one of his inane adolescent
hostile comments!!


I was beginning to feel a bit inferior.


Or maybe it was because he knows I am a shrink and can comprehend the
depth of his psychopathology.


Doesn't matter now. I am up to date with the elite of R.A.P.


Get over yourself; his ewe begged off. Left him with slime on his hands.

--
ha
  #38   Report Post  
David Morgan \(MAMS\)
 
Posts: n/a
Default

You deserved waaay more asterisks than you actually received. ;-)

DM



"Willie K.Yee, M.D." wrote in message ...

FINALLY !!! FINALLY !!!FINALLY !!!

I have been RECOGNIZED!!!

The Phil has deigned to dope-slap me with one of his inane adolescent
hostile comments!!

I was beginning to feel a bit inferior.

Or maybe it was because he knows I am a shrink and can comprehend the
depth of his psychopathology.

Doesn't matter now. I am up to date with the elite of R.A.P.


On Fri, 25 Mar 2005 11:47:56 +1100, "Phil Allison"
wrote:


"Willie K.Yee, M.D

If anyone is paying attention, this post actually contains the answer
to the question.



* * How the hell would YOU know ?????





............ Phil



  #39   Report Post  
Mike Rivers
 
Posts: n/a
Default


In article wkyeeATbestwebDOTnet writes:

I have been RECOGNIZED!!!
The Phil has deigned to dope-slap me with one of his inane adolescent
hostile comments!!


Welcome to the club.


--
I'm really Mike Rivers )
However, until the spam goes away or Hell freezes over,
lots of IP addresses are blocked from this system. If
you e-mail me and it bounces, use your secret decoder ring
and reach me he double-m-eleven-double-zero at yahoo
Reply
Thread Tools
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Urban Assembly Academy for History and Citizenship for Young Men needs your help! Black Cree Pro Audio 0 December 27th 04 09:16 PM
Doppler Distortion - Fact or Fiction Bob Cain Pro Audio 266 August 17th 04 06:50 AM
Black History, Negroes Are The REAL Jews Will_Skillz Car Audio 3 February 9th 04 12:29 AM
Where are those Wascally Weapons of Mass Destwuction??? Jacob Kramer Audio Opinions 1094 September 9th 03 02:20 AM


All times are GMT +1. The time now is 12:47 AM.

Powered by: vBulletin
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 AudioBanter.com.
The comments are property of their posters.
 

About Us

"It's about Audio and hi-fi"