vintageHIWATTconvention.com

I've just finished biasing my SA-212 after adding a bias pot, have a nice pair of pretty well matched Mullards in and she sounds glorious...

I was getting ready to mount the chassis back in the cab, and I remembered thinking that this mounting system is a little strange. It sure doesn't look normal to me, but this is the only 212 I've ever seen the inside of. If you guys could take a look... should these little pivoting pieces actually be a full-width shelf? I can make one up, just thought I'd check. They pivot on one wood screw at the back... seems a little shaky.

the wood blocks attach to the chassis.
the screw should be removed then the chassis with attached block slide out.

the screw is just used to help secure the chassis in addition to the back panel.

Thanks! So the two plywood blocks should actually attach to the chassis, which should then slide into the cab box? That would make a lot more sense than having two little wood screws hold the blocks in place while you reach around trying to attach them to the chassis...

yes, that is correct.