Category Archives: Linn LP12 Hercules II

Linn LP12 Upgrade to Hercules II Power Supply

Today I received my new Hercules II power supply for my Linn LP12 (1982, pre Valhalla).

I’ve put some pictures here so you can see how to install, which is made slightly more complicated as you’ll need to drill out the holes for the stand-offs for the PSU card.

So lets plug the spindle reservoir, so the bearing oil doesn’t spill out. Apparently there’s a cap you can use but I simply used clingfilm taped to the top.

Plug the spindle reservoir.
Plug the spindle reservoir.

Now we can place the turntable upside down on some cushions on a well lit surface (I used by Range Master cooker as the hood light is very bright).

Upturned LP12
Upturned LP12

OK lets get the back off and have a look at the old PSU.

Original PSU
Original PSU

We can disconnect the motor wires, which are soldered on, and the wires to the switch.

Original PSU
Original PSU

I’ve popped out the power switch, which was relatively easy as there where no corner braces. So now we have a bare cross brace.

cross brace LP12
cross brace LP12

With a silver Sharpie pen I made marks for the holes for the spacers on the Hercules II psu. Then I drilled 6 holes in my £600 turntable !!!.

cross brace LP12 with holes and risers.
cross brace LP12 with holes and risers.

Well after a stiff coffee I figured I’m nearly there. Next simply place the psu on the spacers and gently push it on.

Hercules II attached to LP12
Hercules II attached to LP12

Connect it up :-).

Hercules II PSU attached to LP12.
Hercules II PSU attached to LP12.

Done! Now find something I haven’t listened to for ages.

Blue light for 45 rpm
Blue light for 45 rpm

This took me just over an hour to do and I’m very pleased with the results. I think everything has just gotten that little tighter, the music is more precise and bass punchy.

This is a cheap way to upgrade an old LP12 and I can definitely recommend it.