Oregon Analog Tools ASM7 mainframe for Tek 7000 series scope plug ins

[kbrill]

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

[kbrill]

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 .

[David Hess]

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.