wow, i'm going to have to keep my kids away for the audiophiles. in the
span of 5 or 6 posts it went from pot to sniffing glue. Long hair
musicians indeed. ;^)
At 08:10 AM 5/21/2007, Hernefjord Ingemar wrote:
>I glued copper foils on something called Pertinax, then I used French
>Polish (shellac)as etchant resist, and finally used Iron Chloride as
>etchant. All done on free hand. And I made my own inductors for the
>speaker high pass filters. And lowered the bass frequency by cutting out
>the speaker membrane with a scalpel, remove the membrane+coil. Then I made
>a mixture of arabic rubber, aceton and textile fibres, let it dry and
>glued this circular string onto the membrane, then reassembled the
>membrane+coil. The lower frequency capability changed from 50 Hz to 10 Hz
>! But you couldn't use much input power (which was not necessary either,
>at that time, when the music content was more important than the amplifier
>max output power). And the output transformer was ordered from England,
>hand made, created by a early audio pioneer named Williamson. It was a
>heavy bit of iron and copper. For getting 20 Watts out, the transformer's
>weight was something like 12 kilograms! I regret deeply, that my early
>creations went into the waste bin!
>I think the word HiFi was not invented when I built my first audio
>equipments.
>Inge
>
>-----Original Message-----
>From: TechNet [mailto:[log in to unmask]] On Behalf Of Brian Ellis
>Sent: den 21 maj 2007 16:09
>To: [log in to unmask]
>Subject: Re: [TN] Friday TechnoTopic
>
>Sorry, Dewey, you misunderstood. You had to smoke the pot to imagine there
>was an improvement.
>
>Believe it or not, in the very early days (early 1950s) of printed
>circuits, before Circuitape/Brady/Bishop brought out adhesive draughting
>aids, we drew the pattern in Indian ink on aluminium-reinforced cartridge
>paper (those were the days, my friend -- I think that may make a good song
>title!). I draughted along the orthogonal axes + 45° but a colleague
>always used a compass for wide radius bends because he believed the
>electrons would follow the track better without the 45° corners!!!
>
>In those days, we used offset printing and while the ink was still wet, we
>sprinkled the board with a dark red powder (dragon's blood) which adhered
>to the wet ink. This was then heated and the powder melted to a pitch-like
>consistency. That was our etch resist! Anyone else remeber this "technology"?
>
>Brian
>
>Whittaker, Dewey (EHCOE) wrote:
> > Back in the 70s, it was a highly held belief that if you pot the
> > electronics, there was a great improvement in the clarity and depth of
> > the music.
> > Dewey
> >
> > -----Original Message-----
> > From: TechNet [mailto:[log in to unmask]] On Behalf Of Michael Kirschner
> > Sent: Sunday, May 20, 2007 2:02 PM
> > To: [log in to unmask]
> > Subject: Re: [TN] Friday TechnoTopic
> >
> > Heh heh...
> >
> > It's all to feed, and thereby make $ off, the terrible disease called
> > "audiophiliosis"...some friends of mine have it...spent tens of
> > thousands of dollars on spectacular equipment and whiz-bang cables to
> > listen to cassette tapes of Grateful Dead concerts...
> >
> > ;o)
> >
> > Mike
> >
> > On Sat, 19 May 2007 10:50:39 +0300, Brian Ellis <[log in to unmask]> wrote:
> >
> >> No, but it's great for 78s! :-)
> >>
> >> Brian
> >>
> >> John Burke wrote:
> >>> Would it improve the sound on my 8 track??
> >>>
> >>> John...................8-)
> >>>
> >>>
> >>>
> >>> John Burke
> >>>
> >>> (408) 515 4992
> >>>
> >>> -----Original Message-----
> >>> From: TechNet [mailto:[log in to unmask]] On Behalf Of David Fowler
> >>> Sent: Friday, May 18, 2007 10:58 AM
> >>> To: [log in to unmask]
> >>> Subject: Re: [TN] Friday TechnoTopic
> >>>
> >>> They do have the amplifier built into the speakers. I saw some
> > about 8
> >>> years ago, sounded nice, and were good and heavy.
> >>>
> >>> Then you can get into the copper crystalline signal cables, which
> >>> are just as expensive as the speaker wires.
> >>>
> >>> It's all about the money...
> >>>
> >>> david
> >>>
> >>> Hogg, Blair K. wrote:
> >>>> I wonder why someone doesn't just put the amplifier at the speaker
> >>>> itself, then run line level audio through shielded cables to each
> >>>> amplifier. Probably too much chance of em noise affecting the
> > signal.
> >>>> Could always go digital to the speaker, then turn it into audio
> > signals
> >>>> driving the voice coil. I think that is how it is done on some
> >>>> automotive systems.
> >>>>
> >>>> -----Original Message-----
> >>>> From: TechNet [mailto:[log in to unmask]] On Behalf Of Inge
> >>>> Sent: Thursday, May 17, 2007 9:27 PM
> >>>> To: [log in to unmask]
> >>>> Subject: Re: [TN] Friday TechnoTopic
> >>>>
> >>>> The world is full of nonsense. A friend of mine bought water cooled
> >>>> speaker cables with pure gold connectors. That cable, I assure,
> > could
> >>>> supply current to a whole block in Santa Domingo. Myself, have an
> >>>> ordinary "room cord" like the one you use for your desk lamp, this
> > one
> >>>> 15 feet long wire feeds a 800 W bass speaker. The loss in the wire
> > is so
> >>>> low, that it's neglectable, and the distortion would noone hear
> >>>> when
> > the
> >>>> bookshelves vibrate and you feel the thunder through the chair's
> > legs. I
> >>>> prefer to listen to the music, not to look at the music via a
> >>>> oscilloscope and a spectrum analyzer.
> >>>> Inge
> >>>>
> >>>> ----- Original Message -----
> >>>> From: "Graham Collins" <[log in to unmask]>
> >>>> To: <[log in to unmask]>
> >>>> Sent: Friday, May 18, 2007 7:21 AM
> >>>> Subject: Re: [TN] Friday TechnoTopic
> >>>>
> >>>>
> >>>>
> >>>>> Ha! I'm guessing that wasn't a blind test. How would that short
> >>>>>
> >>>> piece
> >>>>
> >>>>> of wire impact audio performance? It's connecting a household
> >>>>> plug socket, through the house wiring (of dubious quality if it's
> >>>>> Inge's
> >>>>> house...) and the power grid... and has a transformer on the
> >>>>> other side, presumably.
> >>>>>
> >>>>> I'm guessing this is along the lines of the speaker wire a sales
> > guy
> >>>>> tried to sell me one time. It was 12 gage wire (overkill, but
> >>>>> OK),
> >>>>>
> >>>> but
> >>>>
> >>>>> he was very earnest in telling me that the wire was formed such
> > that
> >>>> it
> >>>>
> >>>>> was optimized for electron flow in one particular direction...
> >>>>>
> >>>>> I'm thinking it's only applied to the AC power cord because
> > anything
> >>>>> more complicated would not emerge functional. Component failures
> >>>>>
> >>>> aside,
> >>>>
> >>>>> what would that do to solder joints???
> >>>>>
> >>>>> regards,
> >>>>>
> >>>>> Graham Collins
> >>>>> Process Engineer,
> >>>>> L-3 Communications Electronic Systems Inc.
> >>>>> Halifax
> >>>>> (902) 873-2000 ext 6215
> >>>>>
> >>>>>
> >>>>>>>> [log in to unmask] 05/17/07 10:37PM >>>
> >>>>>>>>
> >>>>> There is a process in High End Audio which purports to enhance
> >>>>> equipment performance , called CryoTreatment.
> >>>>>
> >>>>> In this process the audio gear is subjected to a ramp down to
> >>>>> -281F
> >>>>>
> >>>> (or
> >>>>
> >>>>> cooler, but not below -320F), followed by a soak of 20 to 40
> >>>>> hours, followed by a specific warm-up cycle back to R/T.
> >>>>>
> >>>>> It is postulated that the technical explanation for the enormous
> >>>>> listening benefits of the process is a re-arrangement or
> > refinement
> >>>> of
> >>>>
> >>>>> the crystal structure of the conductor metals. The effect is so
> >>>>>
> >>>> powerful
> >>>>
> >>>>> that objective listeners reported a significant improvement in
> > audio
> >>>>> quality when the AC power cord for a preamp was so treated. I
> > doubt
> >>>> my
> >>>>
> >>>>> aging ears are responsive to subtleties of this nature.
> >>>>>
> >>>>> Anybody care to estimate how an electronic assembly, surface-mount
> > or
> >>>>> otherwise, including semiconductor devices, would fare thru this
> >>>>> process?
> >>>>>
> >>>>> Tom Stearns
> >>>>> 3 Brander Court
> >>>>> Nashua, NH
> >>>>> 03063
> >>>>>
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