Marantz SM-80 Amplifier Repair & Restoration

In this second of two articles on the Marantz SC-80 preamplifier and SM-80 power amplifier, we look at the SM-80 power amplifier. Specifically I detail the work required to restore this amplifier back to full working condition. The earlier article looks at work done to matching Marantz SC-80 preamplifier.

The Marantz SM-80 stereo power amplifier is a reasonably powerful, well-made, mid-range consumer amplifier from around 1990.… Read more

Marantz SC-80 Preamplifier Repair

A customer recently asked me to look at his immaculate Marantz SC-80 preamplifier / SM-80 power amplifier combo. Both pieces were playing up and required work. In this article I will look at the preamplifier, the next article will examine work required to remedy the power amplifier.

 

 

The Marantz SC-80, and its partner, matching Marantz SM-80, are quality mid-range separates hailing from around 1990.… Read more

BMW R1200R Motorcycle Problems

Hi folks, this post is not related to audio in any way. Rather, it’s a summary of some recent problems I’ve had with my 2009 BMW R1200R motorcycle.

The BMW R1200R is a superb bike in every respect and a joy to ride and work on. I’ve owned more than 15 bikes over the years and this one is my pick in terms of being fun to ride, having gobs of torque, killer one finger brakes, almost no dive under braking, awesome handling, great range and fuel economy and the list goes on.… Read more

Sony PS-1150 Belt-Drive Turntable Service 

I recently serviced a Sony PS-1150 belt drive turntable and want to discuss why I service the spindle bearings on turntables.

The spindle bearing is the central bearing about which the platter turns, rotating the record. This bearing can be anything from a basic narrow steel spindle, to an elaborate bearing with massive stainless steel shaft and ball bearing at the top or bottom.… Read more

JVC QL-F4 DD Turntable Repair & Service

One of the decks I worked on recently is a very cool old JVC QL-F4 direct-drive, fully automatic turntable.

The JVC QL-F4 is a mid-range deck from the once great JVC. Even in the late 70’s and early 80’s, JVC were not really known for their hifi separates. This is a shame because this series of JVC turntables had great specs.… Read more

Cherishing Classic Audio