hissing sound coming from behind woofer on one side AR11
in [Repair]
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From: Ron on 4 Aug 2010 06:06 On 03/08/2010 01:18, Arfa Daily wrote: > > > "Meat Plow" <mhywatt(a)yahoo.com> wrote in message > news:pan.2010.08.02.16.02.36(a)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(a)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)
From: Meat Plow on 4 Aug 2010 08:16 On Tue, 03 Aug 2010 23:34:59 -0400, Michael A. Terrell wrote: > Arfa Daily wrote: >> >> "Meat Plow" <mhywatt(a)yahoo.com> wrote in message >> news:pan.2010.08.02.16.02.36(a)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(a)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
From: William Sommerwerck on 4 Aug 2010 08:41 > 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.
From: Arfa Daily on 4 Aug 2010 12:41
"William Sommerwerck" <grizzledgeezer(a)comcast.net> wrote in message news:i3bn7r$ip0$1(a)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 |