Preamplifiers
- SR560 Stanford Research PreamplifierCondition: UsedFrequency: 1 MHz
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- SR570 Stanford Research PreamplifierCondition: UsedFrequency: 100 Hz
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- SR445 Stanford Research PreamplifierCondition: UsedFrequency: 300 Hz
- SR550 Stanford Research PreamplifierCondition: UsedFrequency: 100 Hz
- GAP-802 Instek PreamplifierSpecial Price $538.46 Regular Price $600.00Condition: NewFrequency: 3 GHz
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