Krell KSA-200S Class-A Amplifier Repair and Restoration

I am about to embark on a Krell KSA-200S Class-A Amplifier Repair and Restoration, in this case for a very good friend of mine.   

As many of you will know, the Krell KSA-200S is a beast of an amplifier, up there with the very best products Krell ever made. It is almost unliftable by one person, being hewn from solid slabs of steel and aluminium.… Read more

Kenwood KP-2022 Belt-Drive Turntable Service

I’ve just finished servicing this lovely old Kenwood KP-2022 belt-drive turntable. The owner asked me if it was worth servicing the old girl. You can imagine my reply!

They just don’t make them like this any more and this Kenwood is a particularly cool deck. The KP-2022 needed a full service, new belt, main bearing lubrication and motor lube as well.… Read more

Legendary NHT 3.3 Loudspeakers for Sale

UDATE – SOLD!

Many of you will know of the legendary NHT 3.3 loudspeaker, they have acquired somewhat of a cult status due to their wide bandwidth and neutral presentation.

I am selling, on consignment, one pair of these classic NHT 3.3s, in almost perfect condition. No dings or scratches that I have found, all drivers in perfect condition, the only thing to mention is that the foam diffraction sheet on the front panel has dried with age.… Read more

Building a Resistance Calibration Standard

I decided to build a resistance standard, for use with my test and measurement gear and good enough that I could some calibration on test and measurement equipment owned by other people. I wanted to build something that would not be prohibitively expensive and that would allow me to reliably calibrate the resistance ranges of my two Keithley bench multimeters and various Fluke hand-held DMMs to at least 0.01% accuracy.… Read more

Servicing the Legendary Technics SL-1200 Direct-Drive Turntable

I’ve just finished servicing three Technics SL-1200 direct drive turntables, along with several other jobs. It seemed like the perfect opportunity to discuss the strengths and weaknesses of this legendary design and look at some basic servicing.

I’ve written a review of the Technics SL-1200 series which you should also take a look at.

The Technics SL-1200 hit the market in 1972 and there was nothing else like it when it was first released.… Read more

Cherishing Classic Audio