hissing sound coming from behind woofer on one side AR11

[Arfa Daily]

"Ron" <ron@lunevalleyaudio.com> wrote in message
news:jKydnVWRZZH1kcnRnZ2dnUVZ7teonZ2d@bt.com...

On 31/07/2010 01:35, Arfa Daily wrote:

Also, the source sounds suspicious, you must admit ? I mean, dmanzaluni
? That must be "the man's a loony", mustn't it ? And the nic.
Ripanykhazov. "Rippin' ya clothes off" maybe ?

Rip her knickers off, Shirley
--

Ah yes, Ron ! Well spotted ...

Arfa

 

[William Sommerwerck]

Sorry if you have been labeled a troll. You seem to have
enough sense to effect a repair so please do.

If you do effect a repair, please let us know what the problem was. I would
be delighted to learn that I was wrong.

 

[William Sommerwerck]

I wouldn't bet on it and I'm not going back through
the thread because I don't thread or keep or watch
articles but, I thought Amanda said the speaker
hissed on its own without an amp powered up.

My memory is that she said it didn't -- the amp had to be on. But there
seemed to be no correlation between the program's content or volume.

Put a 'scope on the amp's output, if you can.

 

[Meat Plow]

On Sat, 31 Jul 2010 08:04:14 -0700, Amanda Ripanykhazov wrote:

On Jul 30, 5:41 pm, Meat Plow <mhyw...@yahoo.com> wrote:
On Fri, 30 Jul 2010 14:03:39 -0700, Amanda Ripanykhazov wrote:
Thank you for your confidence everyone: If I wanted to wind everyone
up, dont you think I would have found a funnier way of doing it than
this?

Not if you're just not too funny in the first place.

If someone can get me a way of posting a wav file to a NG, let me
know and I will stick a microphone in front of the speaker and post
whatever it records

Meanwhile I will take the speaker out and report back if/when I have
a result

But you've already subbed the speaker and the hiss went away or so I
thought I had previously read.

Call me an old cynic and obviously I am not a technical expert but
doesnt simple logic mandate that when you sub a speaker and the sound
goes away, all it means is that (what I thought blindingly obvious from
the symptoms and there being no apparent logical connection between the
source and the hissing, which was why I posted here: Because "The
problem is that you are describing something that doesn't seem to make
any sense, or have any obvious explanation" so I wondered whether anyone
had come across it before) the sound wasnt coming from the source? Or
did I have to add that when i put the speaker back again, the sound came
back?

Sorry if you have been labeled a troll. You seem to have enough sense to
effect a repair so please do.

 

[Meat Plow]

On Sat, 31 Jul 2010 12:25:38 -0700, nesesu wrote:

On Jul 31, 9:30 am, "William Sommerwerck" <grizzledgee...@comcast.net
wrote:
Call me an old cynic and obviously I am not a technical expert but
doesnt simple logic mandate that when you sub a speaker and the sound
goes away, all it means is that (what I thought blindingly obvious from
the symptoms and there being no apparent logical connection between the
source and the hissing, which was why I posted here: Because "The
problem is that you are describing something that doesn't seem to make
any sense, or have any obvious explanation" so I wondered whether
anyone had come across it before) the sound wasnt coming from the
source? Or did I have to add that when i put the speaker back again,
the sound came back?

Your speakers are passive devices. They cannot make any sort of sound
on their own.

If hissing is coming from one of them (but not the other, when driven
from the same amp), the speaker must be therefore be the source of the
hiss. But as there is nothing in the speaker that could, by itself,
create sound, then the speaker must be altering or distorting its input
to produce the hiss. However, you say that the presence or level of the
hiss is not related to the program material.

This makes no sense. The logical conclusion is that A: you are grossly
mis-describing the symptoms, or B: this is a troll.

I think it's B. I really don't have any more time for this
tsuris/tsimmes. Take your pick.

There is a slight possibility that there is an issue with the crossover
in this speaker that de-stabilizes the driving amplifier, causing an HF
oscillation in the amp, yet the amp IS stable with the other speaker.
I worked on an Pioneer amp that was marginally stable and would
oscillate depending on the load. The clue it was oscillating was a
'sizzle' in the speaker and the overload lamp was always lit. Other than
that it appeared to work fine to the owners old ears, although there was
a slightly perceptable clipping distortion on louder passages. A slight
adjustment of the R-C feedback in the amp returned the rock solid
stability and eliminated the perceived 'hiss'. That system had been to
two 'professional' shops; one said there was nothing wrong and the other
said it could not be repaired.

Neil S.

I wouldn't bet on it and I'm not going back through the thread because I
don't thread or keep or watch articles but, I thought Amanda said the
speaker hissed on its own without an amp powered up.

 

[Michael A. Terrell]

Amanda Ripanykhazov wrote:

Thank you for your confidence everyone: If I wanted to wind everyone
up, dont you think I would have found a funnier way of doing it than
this?

If someone can get me a way of posting a wav file to a NG, let me know
and I will stick a microphone in front of the speaker and post
whatever it records

Meanwhile I will take the speaker out and report back if/when I have a
result

1: Google doesn't allow any attachments.

2: This is not a binaries newsgroup so any message with an attachment
won't propagate to most news servers.

 

[Michael A. Terrell]

Jamie wrote:

Amanda Ripanykhazov wrote:

On Jul 30, 5:41 pm, Meat Plow <mhyw...@yahoo.com> wrote:

On Fri, 30 Jul 2010 14:03:39 -0700, Amanda Ripanykhazov wrote:

Thank you for your confidence everyone: If I wanted to wind everyone up,
dont you think I would have found a funnier way of doing it than this?

Not if you're just not too funny in the first place.


If someone can get me a way of posting a wav file to a NG, let me know
and I will stick a microphone in front of the speaker and post whatever
it records

Meanwhile I will take the speaker out and report back if/when I have a
result

But you've already subbed the speaker and the hiss went away or so I
thought I had previously read.


Call me an old cynic and obviously I am not a technical expert but
doesnt simple logic mandate that when you sub a speaker and the sound
goes away, all it means is that (what I thought blindingly obvious
from the symptoms and there being no apparent logical connection
between the source and the hissing, which was why I posted here:
Because "The problem is that you are describing something that doesn't
seem to make any sense, or have any obvious explanation" so I wondered
whether anyone had come across it before) the sound wasnt coming from
the source? Or did I have to add that when i put the speaker back
again, the sound came back?
check for electrical devices adjacent to the speaker, inside and outside
of the wall. Your speaker coil maybe in the path of an induced magnetic
field from a device near by..

etc..

You think she has a MRI machine in her wall? The voice coil isn't
going to be affected by nearby magnetic fields, due to the narrow gap
and shielding.

 

[GregS]

In article <cc42fb59-8483-4e9e-ba6b-a1c0a4e999e4@q35g2000yqn.googlegroups.com>, Amanda Ripanykhazov <dmanzaluni@googlemail.com> wrote:

Thank you for your confidence everyone: If I wanted to wind everyone
up, dont you think I would have found a funnier way of doing it than
this?

If someone can get me a way of posting a wav file to a NG, let me know
and I will stick a microphone in front of the speaker and post
whatever it records

I thought it was from BEHIND the speaker.

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Meanwhile I will take the speaker out and report back if/when I have a
result

 

[Chuck]

On Tue, 20 Jul 2010 12:30:48 -0700 (PDT), Amanda Ripanykhazov
<dmanzaluni@googlemail.com> wrote:

Anyone know what this means? This hissing sound isnt constant, it is
irregular: It isnt related to the music or any movement of the cone
or any signal put through it, though it doesnt happen when no sound is
put through the speaker.

Frankly it sounds more mechancial than electronic (as if there is
something behind there!) but as I say, it isnt related to whatever is
coming through the speaker though it does increase and decrease with
adjustment of the volume control. Andit is louder than most signals
put through the woofer itself??

Is it indicative of some pot in the crossover needing cleaning or is
there something else going on please? (I have seen reference to people
improving the sound of AR11s by bypassing the tone controls in the
speaker completely). This speaker is quite elderly and I would
imagine that if it does use mechanical pots, they must be fairly dirty
by now

I once lived in an old mansion that had been converted into an
apartment building where one of my KLH 32 speakers was mounted by the
main electrical entrance for the building. There sometimes was a soft
noise from the tweeter without the amplifier being on. Later on we
discovered that the owner of the building had replaced one of the
cartridge fuses in series with the hot 120 AC in with a piece of
copper pipe that was arcing at the fuse clips. I know this sounds
apocryphal but I spent 32 years in the consumer audio field as a
technician, and service and store manager so you can be reasonably
sure, in this case, that I'm not a troll . Chuck

 

[William Sommerwerck]

I once lived in an old mansion that had been converted into an
apartment building where one of my KLH 32 speakers was mounted
by the main electrical entrance for the building. There was sometimes
a soft noise from the tweeter without the amplifier being on. Later on
we discovered that the owner of the building had replaced one of
the cartridge fuses in series with the hot 120 AC in with a piece of
copper pipe that was arcing at the fuse clips.

What do you think formed the "return path" that allowed current to flow
through the speaker?

For example... In the simplest possible 2-way system, with only a capacitor
in series with the tweeter, * there would be no complete circuit for the
current to flow through the tweeter, unless the unpowered amplifier had a
sufficiently low output impedance.

* The woofer can be designed to mechanically roll off at the crossover
frequency, so no inductor is needed.

 

[William Sommerwerck]

The tweeter, capacitor and woofer are all effectively
in series as a loop in the speaker box...

Duh. I should surrender my BSEE.

 

[nesesu]

On Aug 2, 7:28 am, "William Sommerwerck" <grizzledgee...@comcast.net>
wrote:

I once lived in an old mansion that had been converted into an
apartment building where one of my KLH 32 speakers was mounted
by the main electrical entrance for the building. There was sometimes
a soft noise from the tweeter without the amplifier being on. Later on
we discovered that the owner of the building had replaced one of
the cartridge fuses in series with the hot 120 AC in with a piece of
copper pipe that was arcing at the fuse clips.

What do you think formed the "return path" that allowed current to flow
through the speaker?

For example... In the simplest possible 2-way system, with only a capacitor
in series with the tweeter, * there would be no complete circuit for the
current to flow through the tweeter, unless the unpowered amplifier had a
sufficiently low output impedance.

* The woofer can be designed to mechanically roll off at the crossover
frequency, so no inductor is needed.

The tweeter, capacitor and woofer are all effectively in series as a
loop in the speaker box, and that loop is large enough to pick up the
high M field spectrum of the arcing 60Hz so close by. Some of that
generated arc noise will fall in the band that the tweeter will
reproduce efficiently.

Neil S.

 

[Meat Plow]

On Mon, 02 Aug 2010 09:21:24 -0500, Chuck wrote:

On Tue, 20 Jul 2010 12:30:48 -0700 (PDT), Amanda Ripanykhazov
dmanzaluni@googlemail.com> wrote:

Anyone know what this means? This hissing sound isnt constant, it is
irregular: It isnt related to the music or any movement of the cone or
any signal put through it, though it doesnt happen when no sound is put
through the speaker.

Frankly it sounds more mechancial than electronic (as if there is
something behind there!) but as I say, it isnt related to whatever is
coming through the speaker though it does increase and decrease with
adjustment of the volume control. Andit is louder than most signals put
through the woofer itself??

Is it indicative of some pot in the crossover needing cleaning or is
there something else going on please? (I have seen reference to people
improving the sound of AR11s by bypassing the tone controls in the
speaker completely). This speaker is quite elderly and I would imagine
that if it does use mechanical pots, they must be fairly dirty by now


I once lived in an old mansion that had been converted into an apartment
building where one of my KLH 32 speakers was mounted by the main
electrical entrance for the building. There sometimes was a soft noise
from the tweeter without the amplifier being on. Later on we discovered
that the owner of the building had replaced one of the cartridge fuses
in series with the hot 120 AC in with a piece of copper pipe that was
arcing at the fuse clips. I know this sounds apocryphal but I spent 32
years in the consumer audio field as a technician, and service and store
manager so you can be reasonably sure, in this case, that I'm not a
troll . Chuck

An old friend used to live within a hundred feet of a radio station. He
swears that on one occasion he could hear programming coming from a
filling in one of his molars.

 

[Arfa Daily]

"Meat Plow" <mhywatt@yahoo.com> wrote in message
newsan.2010.08.02.16.02.36@hahahahahahahah.nutz...

On Mon, 02 Aug 2010 09:21:24 -0500, Chuck wrote:

On Tue, 20 Jul 2010 12:30:48 -0700 (PDT), Amanda Ripanykhazov
dmanzaluni@googlemail.com> wrote:

Anyone know what this means? This hissing sound isnt constant, it is
irregular: It isnt related to the music or any movement of the cone or
any signal put through it, though it doesnt happen when no sound is put
through the speaker.

Frankly it sounds more mechancial than electronic (as if there is
something behind there!) but as I say, it isnt related to whatever is
coming through the speaker though it does increase and decrease with
adjustment of the volume control. Andit is louder than most signals put
through the woofer itself??

Is it indicative of some pot in the crossover needing cleaning or is
there something else going on please? (I have seen reference to people
improving the sound of AR11s by bypassing the tone controls in the
speaker completely). This speaker is quite elderly and I would imagine
that if it does use mechanical pots, they must be fairly dirty by now


I once lived in an old mansion that had been converted into an apartment
building where one of my KLH 32 speakers was mounted by the main
electrical entrance for the building. There sometimes was a soft noise
from the tweeter without the amplifier being on. Later on we discovered
that the owner of the building had replaced one of the cartridge fuses
in series with the hot 120 AC in with a piece of copper pipe that was
arcing at the fuse clips. I know this sounds apocryphal but I spent 32
years in the consumer audio field as a technician, and service and store
manager so you can be reasonably sure, in this case, that I'm not a
troll . Chuck

An old friend used to live within a hundred feet of a radio station. He
swears that on one occasion he could hear programming coming from a
filling in one of his molars.

This is quite common. The BBC used to operated a long wave transmitter in
the county where I live. It was 200kW during the daylight hours, and 470kW
at night. There were always reports in the local newspaper of people
experiencing oddball reception events, and picking up radio 'in your head'
was a regular one. Apparently, it happens more when fillings are new, and
the oxide layers or what have you, are still building. Supposedly, the
filling acts as a simple diode detector, and if the field strength is high
enough, actually 'rattles' mechanically. The vibration from this passes out
of the tooth and up the jawbone into the skull, where it is picked up
directly by the ears. I have also seen the phenomenon explained as the
detected audio voltage passing out of the tooth, and directly stimulating
nerves that are part of the hearing centre. I suppose that's possible, but
it sounds less likely to me, than the first explanation.

Another few favourites for 'ghost' reception near this transmitter, were
electric cookers, stereo systems that were turned off, and mattress springs
!!

Arfa

 

[Meat Plow]

On Tue, 03 Aug 2010 01:18:22 +0100, Arfa Daily wrote:

"Meat Plow" <mhywatt@yahoo.com> wrote in message
newsan.2010.08.02.16.02.36@hahahahahahahah.nutz...
On Mon, 02 Aug 2010 09:21:24 -0500, Chuck wrote:

On Tue, 20 Jul 2010 12:30:48 -0700 (PDT), Amanda Ripanykhazov
dmanzaluni@googlemail.com> wrote:

Anyone know what this means? This hissing sound isnt constant, it is
irregular: It isnt related to the music or any movement of the cone
or any signal put through it, though it doesnt happen when no sound is
put through the speaker.

Frankly it sounds more mechancial than electronic (as if there is
something behind there!) but as I say, it isnt related to whatever is
coming through the speaker though it does increase and decrease with
adjustment of the volume control. Andit is louder than most signals
put through the woofer itself??

Is it indicative of some pot in the crossover needing cleaning or is
there something else going on please? (I have seen reference to people
improving the sound of AR11s by bypassing the tone controls in the
speaker completely). This speaker is quite elderly and I would
imagine that if it does use mechanical pots, they must be fairly dirty
by now


I once lived in an old mansion that had been converted into an
apartment building where one of my KLH 32 speakers was mounted by the
main electrical entrance for the building. There sometimes was a soft
noise from the tweeter without the amplifier being on. Later on we
discovered that the owner of the building had replaced one of the
cartridge fuses in series with the hot 120 AC in with a piece of
copper pipe that was arcing at the fuse clips. I know this sounds
apocryphal but I spent 32 years in the consumer audio field as a
technician, and service and store manager so you can be reasonably
sure, in this case, that I'm not a troll . Chuck

An old friend used to live within a hundred feet of a radio station. He
swears that on one occasion he could hear programming coming from a
filling in one of his molars.

This is quite common. The BBC used to operated a long wave transmitter
in the county where I live. It was 200kW during the daylight hours, and
470kW at night. There were always reports in the local newspaper of
people experiencing oddball reception events, and picking up radio 'in
your head' was a regular one. Apparently, it happens more when fillings
are new, and the oxide layers or what have you, are still building.
Supposedly, the filling acts as a simple diode detector, and if the
field strength is high enough, actually 'rattles' mechanically. The
vibration from this passes out of the tooth and up the jawbone into the
skull, where it is picked up directly by the ears. I have also seen the
phenomenon explained as the detected audio voltage passing out of the
tooth, and directly stimulating nerves that are part of the hearing
centre. I suppose that's possible, but it sounds less likely to me, than
the first explanation.

Another few favourites for 'ghost' reception near this transmitter, were
electric cookers, stereo systems that were turned off, and mattress
springs !!

Arfa

So Amanda may live near a 500kw transmitter that plays wildlife sounds.
That would explain the snake hissing behind her speaker.


--
This is a test sig

 

[Michael A. Terrell]

Arfa Daily wrote:

"Meat Plow" <mhywatt@yahoo.com> wrote in message
newsan.2010.08.02.16.02.36@hahahahahahahah.nutz...
On Mon, 02 Aug 2010 09:21:24 -0500, Chuck wrote:

On Tue, 20 Jul 2010 12:30:48 -0700 (PDT), Amanda Ripanykhazov
dmanzaluni@googlemail.com> wrote:

Anyone know what this means? This hissing sound isnt constant, it is
irregular: It isnt related to the music or any movement of the cone or
any signal put through it, though it doesnt happen when no sound is put
through the speaker.

Frankly it sounds more mechancial than electronic (as if there is
something behind there!) but as I say, it isnt related to whatever is
coming through the speaker though it does increase and decrease with
adjustment of the volume control. Andit is louder than most signals put
through the woofer itself??

Is it indicative of some pot in the crossover needing cleaning or is
there something else going on please? (I have seen reference to people
improving the sound of AR11s by bypassing the tone controls in the
speaker completely). This speaker is quite elderly and I would imagine
that if it does use mechanical pots, they must be fairly dirty by now


I once lived in an old mansion that had been converted into an apartment
building where one of my KLH 32 speakers was mounted by the main
electrical entrance for the building. There sometimes was a soft noise
from the tweeter without the amplifier being on. Later on we discovered
that the owner of the building had replaced one of the cartridge fuses
in series with the hot 120 AC in with a piece of copper pipe that was
arcing at the fuse clips. I know this sounds apocryphal but I spent 32
years in the consumer audio field as a technician, and service and store
manager so you can be reasonably sure, in this case, that I'm not a
troll . Chuck

An old friend used to live within a hundred feet of a radio station. He
swears that on one occasion he could hear programming coming from a
filling in one of his molars.

This is quite common. The BBC used to operated a long wave transmitter in
the county where I live. It was 200kW during the daylight hours, and 470kW
at night. There were always reports in the local newspaper of people
experiencing oddball reception events, and picking up radio 'in your head'
was a regular one. Apparently, it happens more when fillings are new, and
the oxide layers or what have you, are still building. Supposedly, the
filling acts as a simple diode detector, and if the field strength is high
enough, actually 'rattles' mechanically. The vibration from this passes out
of the tooth and up the jawbone into the skull, where it is picked up
directly by the ears. I have also seen the phenomenon explained as the
detected audio voltage passing out of the tooth, and directly stimulating
nerves that are part of the hearing centre. I suppose that's possible, but
it sounds less likely to me, than the first explanation.

Another few favourites for 'ghost' reception near this transmitter, were
electric cookers, stereo systems that were turned off, and mattress springs
!!

WLW in Cincinnati, Ohio used to run 500 KW on 700 KHz under an
experimental license. Local farmers reported talking and singing fence
wire or a few miles from their tower.

http://hawkins.pair.com/wlw.shtml has some photos and a description,
along with a simplified schematic of the beast. It also has one of the
few remaining Blaw-Knox diamond towers.

WSM in Nashville has another Blaw-Knox tower. http://www.wsmonline.com

 

[Ron]

On 03/08/2010 01:18, Arfa Daily wrote:

"Meat Plow" <mhywatt@yahoo.com> wrote in message
newsan.2010.08.02.16.02.36@hahahahahahahah.nutz...
On Mon, 02 Aug 2010 09:21:24 -0500, Chuck wrote:

On Tue, 20 Jul 2010 12:30:48 -0700 (PDT), Amanda Ripanykhazov
dmanzaluni@googlemail.com> wrote:

Anyone know what this means? This hissing sound isnt constant, it is
irregular: It isnt related to the music or any movement of the cone or
any signal put through it, though it doesnt happen when no sound is put
through the speaker.

Frankly it sounds more mechancial than electronic (as if there is
something behind there!) but as I say, it isnt related to whatever is
coming through the speaker though it does increase and decrease with
adjustment of the volume control. Andit is louder than most signals put
through the woofer itself??

Is it indicative of some pot in the crossover needing cleaning or is
there something else going on please? (I have seen reference to people
improving the sound of AR11s by bypassing the tone controls in the
speaker completely). This speaker is quite elderly and I would imagine
that if it does use mechanical pots, they must be fairly dirty by now


I once lived in an old mansion that had been converted into an apartment
building where one of my KLH 32 speakers was mounted by the main
electrical entrance for the building. There sometimes was a soft noise
from the tweeter without the amplifier being on. Later on we discovered
that the owner of the building had replaced one of the cartridge fuses
in series with the hot 120 AC in with a piece of copper pipe that was
arcing at the fuse clips. I know this sounds apocryphal but I spent 32
years in the consumer audio field as a technician, and service and store
manager so you can be reasonably sure, in this case, that I'm not a
troll . Chuck

An old friend used to live within a hundred feet of a radio station. He
swears that on one occasion he could hear programming coming from a
filling in one of his molars.

This is quite common. The BBC used to operated a long wave transmitter
in the county where I live. It was 200kW during the daylight hours, and
470kW at night. There were always reports in the local newspaper of
people experiencing oddball reception events, and picking up radio 'in
your head' was a regular one. Apparently, it happens more when fillings
are new, and the oxide layers or what have you, are still building.
Supposedly, the filling acts as a simple diode detector, and if the
field strength is high enough, actually 'rattles' mechanically. The
vibration from this passes out of the tooth and up the jawbone into the
skull, where it is picked up directly by the ears. I have also seen the
phenomenon explained as the detected audio voltage passing out of the
tooth, and directly stimulating nerves that are part of the hearing
centre. I suppose that's possible, but it sounds less likely to me, than
the first explanation.

Another few favourites for 'ghost' reception near this transmitter, were
electric cookers, stereo systems that were turned off, and mattress
springs !!

Arfa

In the house where we lived some years ago, we used to get 'fax machine'
noises from the bedside lamp during the night. Happily it only happened
when it was switched on.

Ron(UK)

 

[William Sommerwerck]

This is quite common. The BBC used to operate a long wave
transmitter in the county where I live. It was 200kW during the
daylight hours, 470kW at night. There were always reports in
the local newspaper of people experiencing oddball reception
events; picking up radio "in your head" was a regular one.

Did they hear it when they weren't relieving themselves?

"Mythbusters" did a segment on this, referencing a claim by Lucille Ball of
having heard radio signals in her head during the '40s. Adam and Jamie did
an uncharacteristically shallow investigation, and were unable to confirm
the effect.

 

[Meat Plow]

On Tue, 03 Aug 2010 23:34:59 -0400, Michael A. Terrell wrote:

Arfa Daily wrote:

"Meat Plow" <mhywatt@yahoo.com> wrote in message
newsan.2010.08.02.16.02.36@hahahahahahahah.nutz...
On Mon, 02 Aug 2010 09:21:24 -0500, Chuck wrote:

On Tue, 20 Jul 2010 12:30:48 -0700 (PDT), Amanda Ripanykhazov
dmanzaluni@googlemail.com> wrote:

Anyone know what this means? This hissing sound isnt constant, it is
irregular: It isnt related to the music or any movement of the cone
or any signal put through it, though it doesnt happen when no sound
is put through the speaker.

Frankly it sounds more mechancial than electronic (as if there is
something behind there!) but as I say, it isnt related to whatever
is coming through the speaker though it does increase and decrease
with adjustment of the volume control. Andit is louder than most
signals put through the woofer itself??

Is it indicative of some pot in the crossover needing cleaning or is
there something else going on please? (I have seen reference to
people improving the sound of AR11s by bypassing the tone controls
in the speaker completely). This speaker is quite elderly and I
would imagine that if it does use mechanical pots, they must be
fairly dirty by now


I once lived in an old mansion that had been converted into an
apartment building where one of my KLH 32 speakers was mounted by
the main electrical entrance for the building. There sometimes was
a soft noise from the tweeter without the amplifier being on. Later
on we discovered that the owner of the building had replaced one of
the cartridge fuses in series with the hot 120 AC in with a piece of
copper pipe that was arcing at the fuse clips. I know this sounds
apocryphal but I spent 32 years in the consumer audio field as a
technician, and service and store manager so you can be reasonably
sure, in this case, that I'm not a troll . Chuck

An old friend used to live within a hundred feet of a radio station.
He swears that on one occasion he could hear programming coming from
a filling in one of his molars.

This is quite common. The BBC used to operated a long wave transmitter
in the county where I live. It was 200kW during the daylight hours, and
470kW at night. There were always reports in the local newspaper of
people experiencing oddball reception events, and picking up radio 'in
your head' was a regular one. Apparently, it happens more when fillings
are new, and the oxide layers or what have you, are still building.
Supposedly, the filling acts as a simple diode detector, and if the
field strength is high enough, actually 'rattles' mechanically. The
vibration from this passes out of the tooth and up the jawbone into the
skull, where it is picked up directly by the ears. I have also seen the
phenomenon explained as the detected audio voltage passing out of the
tooth, and directly stimulating nerves that are part of the hearing
centre. I suppose that's possible, but it sounds less likely to me,
than the first explanation.

Another few favourites for 'ghost' reception near this transmitter,
were electric cookers, stereo systems that were turned off, and
mattress springs !!



WLW in Cincinnati, Ohio used to run 500 KW on 700 KHz under an
experimental license. Local farmers reported talking and singing fence
wire or a few miles from their tower.

http://hawkins.pair.com/wlw.shtml has some photos and a description,
along with a simplified schematic of the beast. It also has one of the
few remaining Blaw-Knox diamond towers.

WSM in Nashville has another Blaw-Knox tower. http://www.wsmonline.com

http://www.rfproof.com/WLW/wlw_500kw_transmitter_mason_ohio.htm



--
This is a test sig

 

[Arfa Daily]

"William Sommerwerck" <grizzledgeezer@comcast.net> wrote in message
news:i3bn7r$ip0$1@news.eternal-september.org...

This is quite common. The BBC used to operate a long wave
transmitter in the county where I live. It was 200kW during the
daylight hours, 470kW at night. There were always reports in
the local newspaper of people experiencing oddball reception
events; picking up radio "in your head" was a regular one.

Did they hear it when they weren't relieving themselves?

"Mythbusters" did a segment on this, referencing a claim by Lucille Ball
of
having heard radio signals in her head during the '40s. Adam and Jamie did
an uncharacteristically shallow investigation, and were unable to confirm
the effect.

Whilst it's undoubtedly an entertaining show to watch, I do sometimes find
the science to be a little 'questionable', probably because of a need to
ensure entertainment value for the network. At the end of the day, almost
anything will work as a simple diode detector, and I see no reason why that
shouldn't be true of an amalgam tooth filling, which is a fairly complex
layered structure, sitting in a conductive liquid. To be fair, I'm pretty
sure that when I first looked into this effect many years ago, whatever I
was reading suggested that it was particularly related to 'new' fillings.
This may well be the case, as new fillings have that very metallic taste
that is actually, I understand, them acting as a tiny battery, and giving
the tongue a mild electric shock, which the brain translates as a 'taste' as
the nerves are being stimulated directly. 470kW of AM must result in a
mother of a high field strength in the locality.

Arfa