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The 3A9 provides differential high-impedance voltage inputs and an AC current probe input | The 3A9 provides differential high-impedance voltage inputs and an AC current probe input | ||
for use with | for use with 125-turn probes ([[P6021]] or [[P6019]]). | ||
The front-end of the 3A9 starts with a differential pair formed by the two N-channel JFETs in a [[151-1027-00]], Q133. | The front-end of the 3A9 starts with a differential pair formed by the two N-channel JFETs in a [[151-1027-00]], Q133. |