Consider Connectors

“God is in the detail” – Ludwig Mies van der Rohe (et al)

Sometimes it’s necessary to re-examine the little things, the forgotten details.  Try to dig out the last 10% improvement.

Consider amplifier and loudspeaker connectors.

We know that music signals are alternating current, AC not DC – swinging positive/negative.  We know also that “current in a conductor resides at the surface at high frequency” (Prof. Malcolm Hawksford, HFNRR Aug 1985): Continue reading

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Kenwood L-07D tonearm

This extraordinary tonearm was fitted to the Kenwood L-07D turntable, the legendary flagship Direct Drive turntable manufactured by Kenwood from 1979-83.

This was the halcyon decade or so, when Japanese hi-fi was at a peak of industrial and electronic design and engineering.

Those were the days when analogue hi-fi was at a high point, with many Japanese companies participating and leading the innovation.  Sadly, some of those great names no longer exist – eg. Fidelity Research, Sansui, Stax, Supex, Coral, Grace, Micro Seiki,…. Continue reading

TECHNICS SP-10MkII turntable – Pt 2

The Technics SP-10MkII turntable’s platter (yellow) is 2.9kg cast aluminium and is screw-fixed down onto the sub-platter rotor of the Direct Drive motor.

A ring magnet (red) is attached to the inside of the rotor.  The motor stator coils are fixed onto the motor bearing base below (green).  This bearing base is also cast aluminium and is attached to the turntable top chassis frame (green), with 4 small M4 screws.

If you examine the Technics SP-10 in detail like this, you can see that there are things that can be improved for potentially better performance. Continue reading

TECHNICS SP-10MkII turntable – Pt 1

The Technics SP-10 Direct Drive turntable was manufactured by Matshushita from 1970.  It had 33/45/78rpm speeds and superb technical specifications for speed accuracy and stability, wow and flutter and rumble.

The MKII / MK2 version was manufactured from around 1975 I believe, until at least 1987.

The SP-10 was supplied as a motor unit without tonearm/s, for studio or commercial use.  Continue reading

Street food – TAIWAN

Taiwan is known for ‘street food’, but ‘snack food’ is a better description for what is found throughout all of Taiwan.

Taiwanese cuisine is most obviously Chinese cuisine, but influenced by the Japanese, who ‘ruled’ Taiwan for 50 years from 1895 to 1945.

Japan constructed and organised much of Taiwan’s civic infrastructure and has greatly influenced public behaviour in general – something that is still much in evidence in (orderly and efficient) Taiwan today. Continue reading