Grinnell College Physics Museum

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280 items

DC MilliAmmeter

0-400 MilliAmperes Model 321-7 (or 1)

DC Ammeter

0-300 milliamperes Type DO-41, Model ABF220

AC MilliAmmeter

0-100 MilliAmperes Model 476

DC Ammeter

0-20 Milliamperes Type DO-41, Model AAX223

Galvanometer

A galvanometer is a device for detecting electric current. The galvanometer pointer deflection is from electric current passing through a coil immersed in a magnetic field.

Oscillograph

Type PM12a6

Vacuum Tube

Created by Grinnell Students in 1922.

MilliAmmeter

0-100 MilliAmperes DC Model 1331

DC Voltmeter

0-75 Volts DC Model 267

RF Ammeter

0-10 Amperes RF Model 507

DC Ammeter

0-10 Amperes Model 280

Multimeter

Model AR-620

DC Ammeter

0-1.5 amperes DC Type DO-41, Model ABM219

DC milliammeter

0-25 Milliamperes DC Model 301

DC Voltmeter

0-800 Volts DC Model 489

DC Ammeter

0-50 MilliAmperes Model 287

Ammeter

0- 500 Amperes DC Model No. 1

Voltmeter

0-120 Volts Model 269

Ammeter

0-50 Amperes DC

Decibel Meter

-.7 to 3 DB Model KX-7497

DC Milliammeter

0-600 Milliamperes DC Model 1