I didn't even know it changed. I had a look at the schematic now and it's the old one with the BA634. It also has a 4013 (IC7) feeding into the BA634 (IC6). Are they both 4013s in the newer version?
It's definitely a pair of 4013's - the second one set up to be functionally equivalent to the old BA634. Here is a better pic with clearer part numbers:
My OC-2 is on page 11 of the internal pics thread. It's a late MIT (2002) and has two 4013s. Something tells me that 4027 schematic is 'imaginatively interpreted' in some way, but I'd be glad to be proved wrong.
OC-2 change from BA634 to 4013
Posted - 05/24/2009 : 09:29:24
