OREGON ANALOG TOOLS ASM7 MAINFRAME
Does anyone have information , manual , schematic , or option list .
I did locate schematic / parts list for the similar Tektronix NT7000
I know from a letter I received from them over 20 years ago that the 3 wide mainframe could be configured as supporting either 2 TEK 7000 series scope amp vertical plugins (typically 7A13 or 7A22 ) along with a single 7000 series time base . or less commonly 3 7000 series amps .
I just received a pristine, possibly unused mainframe which is configured differently . the right hand compartment has a different connector than Tektronix used , and appears to only have only the Power supplies otherwise ) supplies connected to it . (further inspection may prove otherwise )
Backplane PCB is not fully populated by components suggesting numerous hardware configurations existed .
Before going further I will be verifying power supply voltages and locations .
Any Documentation / suggestions would be appreciated
Thank you
Further inspections shows handwritten notation on motherboard tm500
Connector in rightmost slot is mechanically compatible with a Tektronix TM500 series plug in
Apparent addition of a 2 additional power transistors on right most slot connector mounting bracket
Suspect / hope this is a straight forward modification to enable usage of a Tek TM500 module in this slot
Getting interesting .
Huh, that is interesting but I guess not totally unexpected. Those mainframes are pretty rare so it is hardly surprising that the TM500 modification has not been documented before.