Changing a TP4 / P-Mount Cartridge for an AT85EP

Now that my Technics direct drive turntable it is permanently installed in a system it’s going to get regular use. The stylus has gaps in it’s known history, so I’m going to change it, just to be safe.

Existing P-Mount Cartridge
Existing P-Mount Cartridge

It is fitted with a P-Mount cartridge, which I’m also going to change. In theory changing such a cartridge should be a 5 minute job. I’m going to take measurements as I go along, so it may take a little longer.

Continue reading “Changing a TP4 / P-Mount Cartridge for an AT85EP”

Mission Cyrus selector switches. What’s inside.

The input selector switches on the Mission Cyrus amplifier deteriorate over time like any switch. Unfortunately their unique construction make them difficult to clean and impossible to replace.

Cyrus One selector Switches

I have always shied clear of any attempt to strip the switches down, knowing that I couldn’t source replacements if it all went wrong. However, a recent mains transformer fail put me in a place where I had nothing to lose. So, in I went. This is what I found Continue reading “Mission Cyrus selector switches. What’s inside.”