155-0080-00

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155-0080 circuit from 7623 manual

The Tektronix M125  (P/N 155-0080-00) is a vertical output amplifier hybrid integrated circuit in a stud-mounted can.

It is used as the vertical output stage in 100 MHz-class 76xx scopes and contains three cascoded differential gain stages, two of which use the "ft doubler" circuit invented by Carl Battjes.

The 155-0080-00 consists of the main amplifier IC with 14 transistors, plus two D058 output transistors, all attached to the same ceramic substrate. This hybrid is also known is H125.

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