Sony PS-2400

This Sony PS-2400 turntable is a pretty rare find. It’s a belt drive, servo-controlled unit and has two speeds: 45 and 33. Sony introduced it in 1971. In Japan it was called the TTS-2400 and retailed for 22,000 yen at the time. Other than that there is not a lot of information available on this turntable. It is a manually operated table and was made in Japan.

The Sony PS-2400 has a very similar look to the PS-2510 which is the direct drive version. The PS-2510 uses a different tonearm though. The more common PS-2250 and PS-2251 are also similar but are direct drive as well.

The PS-2400 doesn’t have a separate tonearm board. The PS-2251 does and the PS-2250 doesn’t. There are tonearm variations on the PS-2250 and PS-2251 as well.

I’m not sure if the one pictured above has been re-veneered or is an original variation. Either way it looks really nice. The light in the middle is the stroboscope.

The PS-2400 uses a low-speed DC servo controlled motor. The low speed is supposed to reduce vibration and noise. There is a dedicated IC in the servo circuit. The fine tuning of the speed (pitch control) is done via the flywheel control at the left corner of the turntable.

Turn the PS-2400 on via one of the speed buttons. Sony called these feather touch buttons. Place the tonearm over the record and lower it via the tonearm lever. When the record is finished, lift the tonearm via the lever and place it back into its rest. Push the off button to power down the turntable.

Specifications:

  • Model: Belt drive turntable
  • Platter: 31cm (12 1/4″) aluminum die cast, 1.5kg (3 lbs 5 oz)
  • motor: DC servo motor
  • Drive system: Belt drive
  • Number of rotations: 33 1/3, 45rpm
  • Speed ​​adjustment range ± 4%
  • Startup characteristic: Within 1/2 rotation (33 1/3 rpm)
  • Wow and flutter: Within 0.06% WRMS
  • S / N ratio: 55 dB or more
  • Semiconductor used – IC: 1 piece
  • Transistor: 1 piece
  • Diode: 1 piece
  • Power supply: AC100V, 50Hz / 60Hz
  • Power consumption: 3W
  • External dimensions: Width 328 x height 118 x depth of 357mm
  • weight: 5 kg
  • Included: 45 turn adapter

The tonearm looks like it’s pretty nice. Aside from the main counter weight there is a lateral balance weight as well. It has an interesting anti-skate weight that hangs from a string. There is a tonearm height adjustment knob at the back of the tonearm base and a lever to lock it. I’ve seen a couple different versions of the Sony headshell as well.

The side view is a little different than most other turntables. The curved base that the platter sits in gives it a sleek and stylish look.

The belt on the PS-2400 is a 25″ belt. The belt goes around the larger of the inner circles on the bottom of the platter.

The dust cover corners tend to chip. The hinges seem to have some issues as well as I’ve seen a number of PS-2400’s with non-original hinges.

While not much is known about the Sony PS-2400. It looks to be a very good turntable. Early Sony equipment was very good. It’s more common variations the PS-2250 and PS-2251 get great reviews as well. It’s also a very nice looking turntable. Just remember that it’s fully manual.

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