Sony PS-LX40P

The PS-LX40P is one in a series of stereo turntable systems manufactured by the Sony Corporation in Taiwan. The series covers PS-LX40, PS-LX40P, PS-LX43P, and PS-LX44P. The PS-LX40 is the only model with built-in mains transformer, whilst the rest of the models in the series required +12 V DC from the main hi-fi system using a 3P connector. Hence, models with the "P" suffix cannot be used standalone with any other hi-fi other than the Sony hi-fi they came with. The PS-LX40P usually accompanied the Sony HST-D501CDM (XO-D501) hi-fi system featured in the hi-fi section of this site. These semi-automatic turntables have speed and eject controls, and you still have to cue the tonearm for playing records. The mechanism is belt driven with a simple 12 V DC motor providing 0.2 % (wrms) wow and flutter. The replacement stylus is usually ND-155G (diamond) which provides approximately 400-hours use.

Review

These are very simple noise-free turntables with a hardboard type base, and plastic construction. The fact they do not have a built-in mains transformer is actually a benefit as it eliminates any mains electromagnetic noise near the high-gain cartridge coils; they simply receive +12 V DC which powers a small low current motor. Many times, I have seen "experts" design commercial turntables with huge unshielded mains transformers that produce a massive hum every time the tonearm moves near it, and it makes you wonder how these "engineers" got their degrees.

When I got this turntable, its 12 V power cable had been cut in several places, and that was an indication that it must have been in the hands of hobbyists. Obviously, people try to use these turntables with their own hi-fi system not realising the power requirements, or the wires to use. On my unit, someone had also cut the audio cable and consequently only one channel was working, whilst the other was short. Therefore, my first task was to correct all of these problems, by soldering a new audio cable terminated with phono plugs at one end. There is plenty of space within the turntable to fit gold plated RCA sockets, perhaps a barrel socket for power, and perhaps a little LED power indicator... However, I decided to keep it in its original design.

The case appears to be a throwback from the earlier model and it still has space for a mains transformer and power supply circuitry. I am sure hobbyists would love to modify it by adding their own power supply circuit. If I had some extra time, I would probably do that especially as I have a recycled shielded mains transformer that is just the right size.

Specifications

Cost/eBay

These turntables still hold some value to hi-fi enthusiasts, and owners often sell them separately. The only snag is the 12 V power cable with a 3P connector, which limits its use with other systems, however if you have some basic electronic skills, you may be able to modify it and connect an external 12 V power supply such as a mains adapter. With the power supply modification, you will then be able to use it with another hi-fi system.

An incomplete unit with missing or broken dust cover, missing cartridge and stylus, is not worth much. However, a complete working unit in good condition can fetch over fifty pounds or more on a good day.

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