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Donner Analog Computers

Model 3500 table top analog computer. Uses vacuum tubes.

Donner 3500 analog computer. Donner 3500 analog computer. Donner 3500 analog computer rear. Donner 3500 label. Donner 3500 analog top.
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A second model 3500 table top analog computer.

Donner 3500 analog computer. Donner 3500 analog computer front. Donner 3500 analog computer rear. Donner 3500 label. Donner 3500 boards.
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Various Donner problem boards.

Donner 3430 problem board #1. Donner 3430 problem board #2. Donner 3430 problem board #3. Donner 3034 problem board.
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Systron Donner SD80 large analog computer, solid state.

SD80 overall view (with some Heathkits on top). SD80 left side showing digital voltmeter. SD80 problem board #3. SD80 right side coefficient pots. SD80 left side opened up. SD80 right side opened up.
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