[Boatanchors] OT: Ignorance :))

[David Hollander]

It's an early op-amp.

http://en.wikipedia.org/wiki/Op-amp#1941:_First_.28vacuum_tube.29_op-amp

73,

Dave N7RK
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Dave  N7RK          Boatanchors Home Page: http://members.cox.net/n7rk
Phoenix, Arizona         *DXCC Honor Roll*    *WAZ#22 - 75 Meter SSB*

ex-XE2/N7RK, N7RK/ZB2, VK2ERK, ZM0AJN, WB6NRK, WN6IWX

Boatanchor and Antique Radio Collector