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qj5Juga8T0uEE3vZ3+wbGA_thumb_16bac.jpg
Circuit board with small handle.

'Input Amplifier MS120 Exp 7-2-68' marked on board;

'Digital Equipment Corporation Maynard Massachusetts' marked on side of insertion handle edge.

vmnQoDgaReOXhuSoOKsq4A_thumb_16baa.jpg
Circuit board with small handle.

'Linc 8 Capacitor and Power Up G906A' marked on board; 'G906' marked on handle.

'Digital Equipment Corporation Maynard Massachusetts' marked on side of insertion handle edge.

yzoot8YES+ibe%EyPCQYBw_thumb_16a41.jpg
Circuit board with small handle.

'Solenoid Drivers ', 'M044B' and '5008563' marked on board; 'M044' marked on handle.

'digital' marked on insertion handle edge.

Box printed with 'digital decproducts module', marker writing '6/1' and '1'…

UNADJUSTEDNONRAW_thumb_16a3e.jpg
Circuit board with small handle.

'EIA to TTY Converter W671B' marked on board; 'W671' marked on handle.

'727A' stamped and 'digital' marked on one side of, and 'Digital Equipment Corporation Maynard Massachusetts' marked on other side of …

UNADJUSTEDNONRAW_thumb_16a39.jpg
Circuit board with small handle.

'FLIP CHIP', 'Clamped Loads W005' and '12-67' marked on board; 'W005' marked on handle.

'Digital Equipment Corporation Maynard Massachusetts' marked on insertion handle edge.

QIkduyU2SC281ciC3EMevg_thumb_16a35.jpg
Circuit board with small handle. ' Inverter B104C' and '5-68' marked on board; 'B104' marked on handle.

'Digital Equipment Corporation Maynard Massachusetts' marked on insertion handle edge.

UNADJUSTEDNONRAW_thumb_16a32.jpg
Circuit board with small handle. ' Diode Gate Driver B685B' marked on board; 'B685' marked on handle.

Printed paper tag attached denotes 'PDP-10 Defective Module'. Writing in pen notes 'Wesleyan 3-20-76'

'Digital Equipment Corporation…

V5W%XZ32RM23OlQ1i8BOSw_thumb_16a2a.jpg
circuit substrate board with markings but no electronics; with small handle.
'XOR Gates M121A' marked on board; 'DEC Flip Chip' marked on obverse.
'Digital Equipment Corporation Maynard Massachusetts' marked on insertion handle edge.

UNADJUSTEDNONRAW_thumb_16a27.jpg
Circuit board with small handle.
'R202D' marked on board; 'R202' marked on handle.
'Digital Equipment Corporation Maynard Massachusetts' marked on insertion handle edge.

UNADJUSTEDNONRAW_thumb_16a23.jpg
Circuit board with small handle.
'Inverter R107C' and '7 - 66' marked on board; 'R107' marked on handle.
'Digital Equipment Corporation Maynard Massachusetts' marked on insertion handle edge.

tFYZnn0qQHibJQ32ZofU4w_thumb_16a1e.jpg
Circuit board with small handle. ' NAND Gate R121A' and 'I 67' marked on board; 'R121' marked on handle.
'Digital Equipment Corporation Maynard Massachusetts' marked on insertion handle edge.

IMG_9469.jpg
Bare backplane for connection of System Building Blocks including power connectors. Label applied to back reads '901 Model 2/26/61'. Sticker applied to front reads 'O.K. Inspected by (DLC in pen) Date: (9/12/61 in pen) Digital Equipment…

IMG_9467.jpg
System Building Block in enclosure. Pulse Generator 3410 marked on front; number stamped '18418' front top.

'Digital Equipment Corporation Maynard Massachusetts' marked on back.

IMG_9466.jpg
System Building Block in enclosure. Flip-Flop 3201 marked on front; number stamped '15863' front top, label applied to front marked 'C'.

'Digital Equipment Corporation Maynard Massachusetts' marked on back.

IMG_9464.jpg
System Building Block in enclosure
Inverter 3101 marked on front; number stamped '21236' front top.

'Digital Equipment Corporation Maynard Massachusetts' marked on back.

IMG_9461.jpg
System Building Block missing enclosure
Clock 3401 marked on front, number stamped '16134' front top. Two dial knobs with one having settings marked A, B, C, D, E

circuit board marked 'Clock Model 3401 D' and '00697'
'Digital Equipment…

IMG_9457.jpg
System Building Block in enclosure
Flip-Flop 3201 marked on front; number stamped '13006' front top.
circuit board marked FF 3201-E 00644
'Digital Equipment Corporation Maynard Massachusetts' marked on back.

IMG_9448.jpg
System Building Block in enclosure
Flip-Flop 3201 marked on front
circuit board marked FF 3201-J Pat. Pend.
'Digital Equipment Corporation Maynard Massachusetts' marked on back.

IMG_9434.jpg
large aluminum (painted) rectangular mounting box for System Building Blocks. Painted speckled tan/brown. 'DEC Building Blocks' marked on back along with 'Digital Equipment Corporation' and 'Maynard Massachusetts' (no other nomenclature).

From…

IMG_9424.jpeg
model number 4509 stamped on front
level standardizer 1502A written on circuit board end
serial number 0137536 stamped on side