The Tektronix 3A8 is an operational amplifier plug-in for 560-series scopes.
It was designed by Roy Hayes.
The Type 3A8 can be used with any of the following adapters:
013-081, 013-068, 013-0048-01, 013-0049-01, 013-0086-00, 013-0067-00.
Specifications please add
The 3A8 contains three Nuvistors, one 6CW4 and a selected pair of 7586s.