Help with wiring colors on old headphones

[TonyL]

upsidedown@downunder.com wrote:

the full 220 Vac in the chassis. Thus I had to rewire the phones so
that one side could (potentially) siting on 220 Vac, and the other
side sitting close to ground potential.

After this alteration, I had no problems with this arrangement.

No problems, no problems, no problems

Good job the phones were well insulated, otherwise..ZZZT !

;-)

 

[Jeff Liebermann]

On Sat, 14 May 2011 08:19:58 -0700 (PDT), spamtrap1888
<spamtrap1888@gmail.com> wrote:

Did anyone ever come up with muffs better than the OEM crap for these?

Search Google for "disposable headphone covers". Something like
these:
<http://www.scansound.com/headphone-covers.htm> (towards bottom of
page). Pack them with something soft (foam, tissue paper, rolled
cloth, old rags, etc) and place them over your headphones.

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

 

[Jeff Liebermann]

On Tue, 17 May 2011 08:27:28 -0700, Jeff Liebermann <jeffl@cruzio.com>
wrote:

On Sat, 14 May 2011 08:19:58 -0700 (PDT), spamtrap1888
spamtrap1888@gmail.com> wrote:

Did anyone ever come up with muffs better than the OEM crap for these?

Search Google for "disposable headphone covers". Something like
these:
http://www.scansound.com/headphone-covers.htm> (towards bottom of
page). Pack them with something soft (foam, tissue paper, rolled
cloth, old rags, etc) and place them over your headphones.

Or, if you're into crochet, you can knit your own:
<http://myplasticfreelife.com/2011/04/crochet-your-own-plastic-free-headphone-ear-pads/>
<http://www.craftbits.com/project/crochet-headphone-covers>
<http://blog.sewhooked.org/2008/10/29/crochet-headphone-covers-revisisted/>
If not, try old socks:
<http://www.instructables.com/id/Sockophones-earphone-padding-made-from-socks/>

Full disclosure: I haven't tried any of the above, but have made some
covers from cloth, elastic, some foam, and with a serger.

--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

 

[John Fields]

On Tue, 17 May 2011 23:07:00 +0000 (UTC), Meat Plow
<mhywattt@yahoo.com> wrote:

On Mon, 16 May 2011 03:13:29 -0400, Michael A. Terrell wrote:

Phil Allison wrote:

"Meat Plow"

** This FUCKWIT troll needs to be kicked off usenet.

Who will help ?


No one will lift a finger to help you, Phyllis.

I will. Phil, just forward my posts to support@altopia.com
with complete headers. That's really all you can do unless
you plan a trip to Ohio to blow my brains out. Here's some
friendly advise, buy a one way ticket.

---
Why do you want to take a sad song and not make it better?

Phil's not so bad, he just has zero tolerance for bullshit and
responds vehemently when he sees it.

What's wrong with that?

--
JF

 

[Meat Plow]

On Mon, 16 May 2011 11:24:40 +1000, Phil Allison wrote:

"Meat Plow"


** This FUCKWIT troll needs to be kicked off usenet.

Who will help ?

Please make your complaints to support@altopia.com
and forward the offensive posts along with full headers.

Have a rotten day Phil.



--
Live Fast Die Young, Leave A Pretty Corpse

 

[Meat Plow]

On Sun, 15 May 2011 20:28:54 -0400, Jamie wrote:

Meat Plow wrote:

On Sun, 15 May 2011 17:37:16 +1000, Phil Allison wrote:



"William Sommerwanker"

"Meat Plow"

** This trolling asshole is a narcissistic psychopath.

He knows nothing and understands even less. I want the lunatic jerk
kicked right off usenet. Who will help me ?

If the "lunatic jerk" you're referring to is yourself... I'd say
everyone in
this group.


** Ain't it just amazing !!

If you go after ONE troll, the rest of the cunts come in and gang up
on you.

So you gotta take the WHOLE lot on, all at once.

What a bunch of gutless, fascist pricks they are.


You don't have what it takes to take on me. I rip you apart anytime you
fly off the handle with your vulgar, threatening reply traps.

You are the epitome of the word Troll.




Fighting a battle of wits does not help you much, especially when
your aponent is unarmed!

Jamie

I don't consider this a fight or battle. If it offends you simply ignore
my posts.



--
Live Fast Die Young, Leave A Pretty Corpse

 

[Meat Plow]

On Mon, 16 May 2011 03:13:29 -0400, Michael A. Terrell wrote:

Phil Allison wrote:

"Meat Plow"

** This FUCKWIT troll needs to be kicked off usenet.

Who will help ?


No one will lift a finger to help you, Phyllis.

I will. Phil, just forward my posts to support@altopia.com
with complete headers. That's really all you can do unless
you plan a trip to Ohio to blow my brains out. Here's some
friendly advise, buy a one way ticket.



--
Live Fast Die Young, Leave A Pretty Corpse

 

[Meat Plow]

On Mon, 16 May 2011 11:23:27 +1000, Phil Allison wrote:

"Meat Plow"


** This FUCKWIT troll needs to be kicked off usenet.

Who will help ?


..... Phil

For the fourth time today I will gladly help you kick me off
Usenet. Forward the posts you feel justify my removal from
Usenet to Chris Caputo - support@altopia.com along with complete
headers. That is all you can do unless you come to Ohio and kill me.




--
Live Fast Die Young, Leave A Pretty Corpse

 

[Meat Plow]

On Tue, 17 May 2011 08:12:37 -0700, Jeff Liebermann wrote:

On Tue, 17 May 2011 08:17:49 +0100, Ian Jackson
ianREMOVETHISjackson@g3ohx.demon.co.uk> wrote:

Is there going to be a prize for suggesting the most obscure (but
effective) way of determining the phasing?

Plug in both earphones or speakers with random wiring and play something
in stereo. If it sounds right, you're done. If the orchestra sounds
like a ping pong game, switch polarity on one earphone or speaker. If
you can't tell the difference, replace the listener and try again. I
hate to admit it, but I've done it this way a few times. I'll accept my
price in US dollars.

If you can actually see the driver diaphragm hook up a AAA cell to the
leads coming from the drive and watch the motion. No different than
phasing regular speakers.



--
Live Fast Die Young, Leave A Pretty Corpse

 

[Meat Plow]

On Mon, 16 May 2011 11:26:18 +1000, Phil Allison wrote:

"Meat Plow"


** This FUCKWIT troll needs to be kicked off usenet.

Who will help ?



..... Phil

For the fifth time, send email with headers of my posts
you find offensive to support@altopia.com. I'll be happy
to help you get me kicked off Usenet Phil.



--
Live Fast Die Young, Leave A Pretty Corpse

 

[Phil Allison]

"Ian Jackson"
Phil Allison

Is there going to be a prize for suggesting the most obscure (but
effective) way of determining the phasing?


** I got one:

Insert a pin through a hole in the earphone grille and let it rest loosely
the diaphragm.

Use the AA cell test.

One polarity will evict the pin.

I reckon that one's certainly for the shortlist for the prize.

** On reflection - it might be better to use a tooth pick.

A pin may well be attracted by the magnet.

Of course, the principle is not new. You can test loudspeakers with a
battery, and watch which way the cone kicks. That would be difficult to do
with headphones, and 'kicking the pin out' overcomes this problem.

** Interesting fact:

Testing a ( moving coil) driver with a battery establishes a polarity that
is the reverse of the "real" one during normal operation.

The *actual cone motion* in response to alternating current drive (within a
driver's operating band) involves a double integration of the current
ave - hence a 180 degree phase shift.

The same fact also means that a cone reproducing a square wave ( within it's
operating band ) follows a motion very close to that when reproducing a sine
wave at the same fundamental frequency. IOW the third and higher order odd
harmonics of the square wave cause very little actual cone motion.

Bet anything this starts an argument.



.... Phil

 

[Phil Allison]

"John Fields"


** Do you know what " meat plow " refers to ?




..... Phil

 

[Spehro Pefhany]

On Wed, 18 May 2011 20:30:08 +1000, the renowned "Phil Allison"
<phil_a@tpg.com.au> wrote:

"John Fields"


** Do you know what " meat plow " refers to ?

Something that furrow one's brow?


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

 

[Phil Allison]

"Spehro Pefhany"

** Do you know what " meat plow " refers to ?

Something that furrow one's brow?

** Not really.

Look it up.

 

[William Sommerwerck]

** Interesting fact:

Testing a ( moving coil) driver with a battery establishes a polarity that
is the reverse of the "real" one during normal operation.

The *actual cone motion* in response to alternating current drive (within
a driver's operating band) involves a double integration of the current
ave [???] -- hence a 180 degree phase shift.

The same fact also means that a cone reproducing a square wave (within
it's
operating band ) follows a motion very close to that when reproducing a
sine
wave at the same fundamental frequency. IOW the third and higher order odd
harmonics of the square wave cause very little actual cone motion.

Bet anything this starts an argument.

There's no argument. As a degreed EE, I'm reasonably certain everything Mr
Clavin here has said is either wrong or a misinterpretation.

The claim of polarity inversion could easily be checked by monitoring the
speaker's output with a mic of known polarity. Or is Cliffy going to claim
that mics, too, have the "wrong" polarity?

There are two likely points of confusion. First, the current flow through an
inductor lags the voltage across the inductor by 90 degrees. (How a "double
integration" occurs is not immediately obvious.) Second, most cone-type
drivers are more resistive than reactive, so you're not going to get 90
degrees, anyway.

Assuming (incorrectly) that the driver were wholly inductive, a double
integration of the current would cause the current to fall at 12dB/8ve.
Assuming the driver is working "constantly velocity", you'd still wind up
with a 6dB/8ve net rolloff. (I think.)

I have no objection to someone saying "Everything you know is wrong!". I do
it all the time. But no one ever gives ME serious consideration, even when
I'm dead right. Cliff, here, should be grateful I treated his claims with a
degree of seriousness. It's far, far more than he deserves.

 

[William Sommerwerck]

"John Fields" <jfields@austininstruments.com> wrote in message
news:8246t6prgh0lp3fdl8nkmctk31ds7v41r0@4ax.com...

Why do you want to take a sad song and not make it better?

Phil's not so bad, he just has zero tolerance for bullshit and
responds vehemently when he sees it.

What's wrong with that?

Lots. There's no point or need to "respond vehemently". A simple statement
of the facts is enough.

It doesn't help that Cliffy refuses to admit his own errors.

 

[Phil Allison]

"William Sommerwanker is a colossal FUCKWIT"

Testing a ( moving coil) driver with a battery establishes a polarity
that
is the reverse of the "real" one during normal operation.

The *actual cone motion* in response to alternating current drive (within
a driver's operating band) involves a double integration of the current
wave [???] -- hence a 180 degree phase shift.

( snip)

Bet anything this starts an argument.

There's no argument. As a degreed EE,

** Shame you are also a 100% autistic metal retard.

Assuming (incorrectly) that the driver were wholly inductive, a double
integration of the current would cause the current to fall at 12dB/8ve.

** False assumptions lead to a false conclusions.

The point is entirely about * cone excursion* above resonance as a function
of drive frequency for fixed AC drive voltage. Obviously a cone does not
follow the actual drive voltage wave - or the excursion and all frequencies
would be the same.

Once you work out the simple relationship is between drive frequency and
cone excursion when the cone's mass dominates the game - you have it.


..... Phil

 

[William Sommerwerck]

The point is entirely about * cone excursion* above resonance as a
function
of drive frequency for fixed AC drive voltage. Obviously a cone does not
follow the actual drive voltage wave - or the excursion and all
frequencies
would be the same.

Once you work out the simple relationship is between drive frequency and
cone excursion when the cone's mass dominates the game - you have it.

How dare you answer a criticism courteously -- what's the world coming to?

I'll check my books on acoustics about this.

 

[JW]

On Wed, 18 May 2011 06:36:19 -0400 Spehro Pefhany
<speffSNIP@interlogDOTyou.knowwhat> wrote in Message id:
<e787t6hnjei8k1orc9g7l844ntb5opa3da@4ax.com>:

On Wed, 18 May 2011 20:30:08 +1000, the renowned "Phil Allison"
phil_a@tpg.com.au> wrote:


"John Fields"


** Do you know what " meat plow " refers to ?

Something that furrow one's brow?

A reference to the Stone Temple Pilots. I think.

 

[John Fields]

On Wed, 18 May 2011 20:30:08 +1000, "Phil Allison" <phil_a@tpg.com.au>
wrote:

"John Fields"


** Do you know what " meat plow " refers to ?




.... Phil

---
I'd guess a penis.

--
JF