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1230-A: Difference between revisions
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The | The {{Title|General Radio 1230-A Electrometer and DC Amplifier}} was introduced in {{Catalog O}} and remained available through {{Catalog T}}. | ||
The Type 1230-A is laboratory instrument designed for the measurement of extremely small voltages or currents and conversely extremely large resistances. It achieves this with the 5886 electronmeter vacuum tube used in the first stage of amplification. The combined gain of the three stages result is a transconductance in the millions of micromhos. The output of the amplifier is read from the panel meter or an optional recorder connection at the rear panel. The recorder terminals are in series with the meter so a resistor is required without a recorder connected. | The Type 1230-A is laboratory instrument designed for the measurement of extremely small voltages or currents and conversely extremely large resistances. It achieves this with the 5886 electronmeter vacuum tube used in the first stage of amplification. The combined gain of the three stages result is a transconductance in the millions of micromhos. The output of the amplifier is read from the panel meter or an optional recorder connection at the rear panel. The recorder terminals are in series with the meter so a resistor is required without a recorder connected. | ||