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The plug-in contains a 25 kHz oscillator that is used to drive a Wheatstone bridge. | The plug-in contains a 25 kHz oscillator that is used to drive a Wheatstone bridge. | ||
This AC excitation / demodulation principle limits signal bandwidth to 6 kHz. | |||
Type Q was [[introduced in 1960]] and was the last all-tube plug-in. | Type Q was [[introduced in 1960]] and was the last all-tube plug-in. |