GEORGE A. PHILBRICK RESEARCHES, INC.


230 Congress Street
Boston 16, Massachusetts

285 Columbus Avenue
Boston 16, Massachusetts

127 Clarendon Street
Boston, Massachusetts 02116

Allied Drive at Route 128
Dedham, Massachusetts 02026


Philbrick Model K2-W Opamp with it's box
photo copyright Doug Coward 2000
Model K2-W computing opamp
George A. Philbrick Researches
Boston, Massachusetts
This is a general purpose computing opamp. First introduced in 1952.
Model K2 ELECTRONIC ANALOG COMPUTOR MODULES
Operational Amplifiers
Model DC Open
Loop Gain
Power Input Voltage
Range
Output Voltage
Range
Drift Rate Tubes
K2-W
Operational
Amplifier
15,000 ±300vdc
6.3vac
±50vdc ±50vdc ±5mv
per day
2 12AX7
K2-X
Operational
Amplifier
30,000 ±300vdc
6.3vac
±50vdc ±100vdc ±5mv
per day
1 12AX7
1 6AN8
Booster Amplifiers
Model Gain Power Input Voltage
Range
Output Voltage
Range
Thermal
Dissipation
Tubes
K2-B1
Booster
Follower
About 0.8 ±300vdc
6.3vac
±70vdc max ±55vdc 24 watts 2 6CM6
Stabilizing Amplifiers
Model DC Open
Loop Gain
Power Output Offset Output Voltage
Range
Stability Tube/Chopper
K2-P
Stabilizing
Amplifier
1000 +300vdc
6.3vac
Below 1mv ±130vdc Below 0.1mv 1 12AX7
1 Airpax A175


P65 amplifier
Close up of two Philbrick P65 solid state operational amplifiers
MP manifold
Close up of the Model MP manifold patch panel
MP manifold
Model MP Solid State Operational Manifold
George A. Philbrick Researches
This is a small desktop manifold with a built-in +/- 15 vdc power supply
and will accept up to four plug-in amplifiers.

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