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Maximum bandwidth is 500kHz, and common-mode rejection is 50,000 to 1. | Maximum bandwidth is 500kHz, and common-mode rejection is 50,000 to 1. | ||
Type 1A7's front end is a matched quad of [[7586]] [[nuvistors]], with | Type 1A7's front end is a matched quad of [[7586]] [[nuvistor|nuvistors]], | ||
two in parallel - to reduce noise - on each input. These tubes are | with two in parallel - to reduce noise - on each input. These tubes are | ||
in temperature-equalizing housings, and mounted on a rubber-isolated | in temperature-equalizing housings, and mounted on a rubber-isolated | ||
subchassis. The "coarse" balance adjustment controls the relative | subchassis. The "coarse" balance adjustment controls the relative |