[Vintage-Audio] Help! Sony Turntable Croaks!

[Bob]

My PRB book shows about 35 Sony TTs. The longest is 35, one
at 25 and a lot (15) at 23.6. If it came off it is
stretched, as it is held on by the belt itself being
stretched. So I opt for the 23.6. But the 23.6 comes in two
sizes, the FR-23.6 and the FRX-23.6. They are both 0.030 in
thickness, the X is 0.185 wide and the blank is 0.210. Duane
indicates that it is close to 1/4 inch wide so that leaces
the FR-23.6. There are 6 models of Sony TTs that use that
belt, the PS-1000, 1010, 1700, 2350, 2700 and the P-5550. I
probably have the belt. 

WBob

"Duane Fischer, W8DBF" wrote:
> 
> Using Phil's method, the length is exactly 13 inches times two, or twenty-six.
> 
> ----------
> From: Phil <k06bb@elite.net>
> To: vintage-audio@mailman.qth.net
> Subject: Re: [Vintage-Audio] Help! Sony Turntable Croaks!
> Date: Monday, July 15, 2002 7:27 PM
> 
> Hi again...
> Belts, as used in turntables, tape decks etc are 'normally' measured by
> their inside circumference, in inches, not diameter.  So, you can measure
> the diameter and use the formula to convert to circumference OR, easier is
> to lay the belt down flat on a ruler and measure it's length, then multiply
> by two to get it's true circumference. This is the method that I use, except
> that I use a belt measuring tool that you slip the belt over to measure.
> 
> I suspect that a FRM 10.5  0r 12.7 will be way to small for said turntable
> as their circumference will only be 10.5 or 12.7 inches.
> 
>     _  _
>    (_\/_)
>    (O  O)   .## 'It may be raining,
>     \ ^/  .'.(\  but there's a rainbow above you...'
>    .-`'_.'.' ||       -The Eagles
>  ,' .-'.'\_-'/
> ( -<, ' _/_-'
>   \__.' _|
>   / /\_/ )      Phil, KO6BB
>  ('(  | /       REAL Radios "Glow in the dark.
>   \ \ |/        REAL Music is played through
>    ) \|\_       'VALVE' Guitar Amplifiers.
>    \_/\_/
>     "  "
> 
> > Well I find a FRM-10.5 and a FRM-12.7 that are 0.210 x
> > 0.031.and a FRM-9.6 which is skinny. I can tell which one
> > with the model number. But there is hope that the 13 inch
> > you measured is OK and you just gotta figure out where it
> > goes.
> >
> > WBob
> >
> > "Duane Fischer, W8DBF" wrote:
> > >
> > > Bob,
> > >
> > > This belt is about .25 wide and has a diameter of 13 inches.
> > >
> > > It does not fit around the underside of the rim of the platter, but on a
> smaller
> > > circle about two thirds the size of the platter.
> > >
> > > Is the speed changed by the belt being moved by these mechanics or by
> the speed
> > > of the motor changing? The buttons do raise a piece of metal higher when
> the
> > > speed changes from 33 1/3 to 45 rpm. Can't see how that would take up
> much
> > > tension though.
> > >
> > > As soon as somebody is here who can see to read, I will check the plate
> on the
> > > back for a model number. There is nothing obvious, as I had someone
> check
> > > before.
> 
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