Ampeg M12 Looking for specs for chassis and turret board

[bastardbus]

I picked up this Ampeg M12 at a vintage radio show last summer for $10. The cabinet is solid and it still has the original 12 Jensen in it. The only problem is the amp chassis is complete gone.

I have heard these amps on YouTube and the circuit has a great sound. I would really like to build a chassis up for this cabinet and re install it. The only problem is I do not have an original chassis or turret board to get the specs from to build one. I have basically all the components PT, OT, Tubes etc etc and I am a metal fabricator so building a chassis is not a problem but it would be nice to have the specs off an original as well as specs and measurements for the layout and turret board.

If anyone can help me with those measurements that would be great.

...or even if someone has an original M12 chassis they would sell or trade off let me know!

Thanks
Todd

[jjman]

I worked on a friend's and here are after and before pics. Most of the couplers where leaking DC.

[rdjones]

M12 pix