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([[1A5|Type 1A5]] has an internal jumper that can be cut.) | ([[1A5|Type 1A5]] has an internal jumper that can be cut.) | ||
Original production uses a pair of type [[8056]] [[Nuvistor|Nuvistors]] in the front end; | Original production uses a pair of type [[8056]] [[Nuvistor|Nuvistors]] in the front end; starting at serial number 7000 these were replaced with JFETs. | ||
In the letter-series timeline of differential comparators, Type W, [[introduced in 1965]], | In the letter-series timeline of differential comparators, Type W, [[introduced in 1965]], | ||