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Next up was the oscillation mirror. I discovered it had fallen out of it's designated mounting spot, so I tore in and remounted it. In the photo below you can see where an old rubber isolation pad had disintegrated. I cleaned all that crusty white adhesive and placed the pad. The second photo...

I didn't take any pictures of disassembling the unit, but there's nothing too complicated about it. These units are well known for malfunctioning due to bad motor control capacitors. I tested the unit, and everything checked out, but I decided to go ahead and replace the troublesome caps anyway...

So the overall plan is to install an early Micro Seiki MA-77 MkI tonearm with subweight, repair the oscillator mirror, recap the board, install new cables, replace the armboard, and clean up the plinth and dust cover. It will need new feet as well. I will be replacing the original three button...

It somewhat reminds me of a Phase Linear. Good bones, but lots of room to do good things to it. I'm pretty well down the path, and dropping back to share pictures while I wait for some parts.

I'm reworking a Thorens TD-125 MKII turntable I recently picked up. The plinth, platter and mechanical were in pretty good shape. It had an odd tonearm with a SDT cartridge. The oscillation window wasn't right, the needle was missing from the cartridge, and the belt was probably original from...

Just curious. The speaker protect board has a Zobel network. Does the White Oak board have one also? And would that be a problem? I remember removing the zobel from Don's speaker protection board on a couple of 400 rebuilds.

Micro seiki MA-77Mk1

Well somebody thought that tonearm was worth something on Ebay. Took about a day to sell it. That paid for the replacement Micro Seiki I am installing in it's place. When I get a minute I'll start a thread on the rebuild of this Thorens 125 MKII.

Yes, the lifter was a nice bonus when I bought this turntable! They ain't cheap.

Joe has the best product support I have ever seen!

Signal from source is clean?

Thank you sir!!!!

I measure the bolt at 4.25mm.. 32 tpi looks right. thx!

I can't seen to find my thread gauge, and thought perhaps someone would have this on the tip of their mind.. Does anyone know the size of the nut which goes on the grounding post of the 4000? Thank you for your time!

Clean build. You're hired!

I meant to say 10 ohm..

Yes, I went with 1w as well.

I'd Replace these. You can see the right one has a bulge.. These are where one tests for bias.

I discovered that Isopropyl Alcohol removes hot glue like magic. I have a set of JBL's that had hot glue all over the crossover. The alcohol worked a treat.

On the units I've restored, I've gone ahead and replaced the 10W resistors on the back plane. Every one I've replaced has been out of spec. Just a thought.