[CW] Tapping Out SOS

[D.J.J. Ring, Jr.]

I used to have a pair of Altec-Lansing A-4 speakers they had 15 inch soft
felt cone type bass drivers crossed over at 500 Hz to multi section horns
for 500 to 3500 Hz and I added four ElectroVoice ST-350A tweeters for 3500
Hz and up.

They stood about five foot high each.

I fed them with a Crown 300 amp, 150 watts each channel, it was mostly for
audio overhead as it was 117 dB loud at 3 feet with 1 watt of audio power,

73

DR

On Mon, Feb 22, 2021, 12:39 AM Richard Knoppow <1oldlens1 at ix.netcom.com>
wrote:

>     Supposedly the reason M-G-M pushed to get a standardized
> theater loudspeaker system was that the older systems would not
> reproduce Eleanore Powell's taps properly. I can believe it
> because there were a variety of systems, all different and often
> with bad time delay effects. I think there were other reasons for
> the development but M-G-M liked to have some romance attached.
> The standard system as developed was named after Douglas Shearer,
> the head of the M-G-M sound department and mainly developed by
> Jim Lansing.  I had a pair of the RCA version but had to sell it.
> The system was probably inspired by a very large dual horn built
> by Bell Labs for its stereo experiments in the early 1930s. A
> couple of these reportedly still exist. They are sometimes called
> Fletcher Horns after Harvey Fletcher, the head researcher in
> acoustics at the Labs.
>     The Shearer system was cheaper to build and until the late
> 1940s was what you heard in most theaters. I miss mine and wish I
> had not had to sell them despite being very deaf these days.
>
> On 2/21/2021 6:50 PM, Michael via CW wrote:
> > Iambic
> >
> > Sent from my iPhone
> >
> >> On Feb 21, 2021, at 6:45 PM, D.J.J. Ring, Jr. <n1ea at arrl.net>
> >> wrote:
> >>
> >> 
> >> Wadda you mean, she used both feet.
> >> 73
> >> DR
> >>
> >> On Sun, Feb 21, 2021 at 12:46 PM <sbjohnston at aol.com
> >> <mailto:sbjohnston at aol.com>> wrote:
> >>
> >>
> >>     QLF
> >>
> >>
> >>
> >>     Steve WD8DAS
> >>
> >>     sbjohnston at aol.com <mailto:sbjohnston at aol.com>
> >>     http://www.wd8das.net/ <http://www.wd8das.net/>
> >>     --------------------------------------------------------------------
> >>     Radio is your best entertainment value.
> >>     --------------------------------------------------------------------
> >>
> >>
> >>
> >>
> >>
> >>     -----Original Message-----
> >>     From: D.J.J. Ring, Jr. <n1ea at arrl.net <mailto:n1ea at arrl.net>>
> >>     To: CW Reflector <cw at mailman.qth.net
> >>     <mailto:cw at mailman.qth.net>>
> >>     Sent: Fri, Feb 19, 2021 10:20 pm
> >>     Subject: [CW] Tapping Out SOS
> >>
> >>     The amazing Eleanor Powell taps out an actual morse code
> >>     in the movie Ship Ahoy (1942) while dancing to the music
> >>     of Tommy Dorsey's orchestra.
> >>     https://youtu.be/jHHj09tVi9Q?t=66
> >>     <https://youtu.be/jHHj09tVi9Q?t=66>
> >>     73
> >>     DR
> >>     ______________________________________________________________
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> --
> Richard Knoppow
> 1oldlens1 at ix.netcom.com
> WB6KBL
>
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