Manufacturer: National Company (USA), Malden, MA
Model: CRM, S#???
Vintage: 1938
Purpose: Monitor Scope
Condition: Working
Comments:
This unit is as basic as can be. There is no amplifier for X or Y deflection and no sweep generator. It is a basic monitor scope, possibly used with external amplifiers. The CRT is a 913, so voltages between 10V and 100V can be observed easily. The original capacitors have been replaced and the unit works fine.
The name plate does not show a serial number, so this may have been a kit.
Model: CRM, S#???
Vintage: 1938
Purpose: Monitor Scope
Condition: Working
Comments:
This unit is as basic as can be. There is no amplifier for X or Y deflection and no sweep generator. It is a basic monitor scope, possibly used with external amplifiers. The CRT is a 913, so voltages between 10V and 100V can be observed easily. The original capacitors have been replaced and the unit works fine.
The name plate does not show a serial number, so this may have been a kit.
Documentation:
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