I purchased a basket of Blue Amberol cylinders and an
Amberola DX today. There are 31 cylinders all in
boxes and I have not looked through the titles (I'm
afraid there's something that I'd like to keep). You
can call tomorrow and I'll read titles over the phone.
They're $100 delivered to Union. The first one that
says "Sold, I'll take them" is the new owner. The DX
is also available. It has a home made grill and is
missing the gear cover but otherwise is nice and in
good working order. It should be cleaned and
lubricated and is $350 delivered to Union. Call if
interested. Thanks, Jerry Blais 541-926-2843
(Pacific Time Zone)
____________________________________________________________________________________
Never miss a thing. Make Yahoo your home page.
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From [email protected] Sat Feb 9 19:48:24 2008
From: [email protected] ([email protected])
Date: Sat Feb 9 19:48:36 2008
Subject: [Phono-L] Victor versus Columbia big guns
Message-ID: <[email protected]>
Another reason 1930s records wear more quickly than those of the 'teens &
'twenties is that they contain a much wider range of frequencies,
wider displacement in the bass even with constant amplitude below a
certain frequency & far smaller size waves causing larger accelleration in
the higher range which increases tracking problems. In the mid-1930s when
recording curves with high frequency pre-emphasis were introduced, the
larger amplitude caused by this further increasing the sharpness of turn at
each side of the wave causing even greater wear. Interestingly, many
pre-1910 78s also exhibit more wear than those from the 'teens & 'twenties
because of their more "forward" recording.
Jim Cartwright
Immortal
Performances
[email protected]
EarthLink Revolves Around You.
> [Original Message]
> From: Jon Noring <[email protected]>
> To: Antique Phonograph List <[email protected]>
> Date: 2/9/2008 5:43:11 PM
> Subject: Re: [Phono-L] Victor versus Columbia big guns
>
> Greg wrote:
>
> > That, by the way, is why sapphire needles, together with the
decreasing
> > compliance in the hardening rubber suspension bits of the old crystal
> > cartridges of the 1930s have wreaked so much damage on records from that
> > period. You may have noticed that your 1930s vintage records sound more
> > worn out than your teens and 1920s records. The reason is that the
"record
> > grinders" of the 1930s chewed the crap out of records with their
sapphire
> > needles tracking at 30 grams whereas the steel needles of the teens
> > developed their flats much faster and didn't chew up the records so
badly.
>
> Thanks for the informative message!
>
> This brings back the next question I have.
>
> Ignoring for the moment the strength requirements of the needle, what
> would be the ideal properties for the tip material?
>
> One can imagine coating or tipping a tungsten needle with this other
> material ("idealium") so as to combine the strength of the titanium to
> transfer the audio energy (and simply not to bend under the weight)
> with the ideal properties of the material in direct contact with the
> record groove.
>
> Of course, we want to minimize record wear, get good tracking, etc.
>
> (This is reminiscent of what Columbia did with laminated records.)
>
>
> I also recall that the use of "fiber" needles -- would the use of
> anisotropic fiber materials for the needle possibly confer desired
> properties? Today we have carbon fiber, kevlar, etc.
>
> Jon Noring
>
>
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>
>
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11:54 AM
