shop-built experimental triode

Cruft Laboratory, Harvard University

Object number: VT0515

Cruft Laboratory, Harvard University

Date: 1912

Object number: VT0826

Cruft Laboratory, Harvard University

Date: 1939

Object number: VT0208

Cruft Laboratory, Harvard University

Object number: VT0469

Cruft Laboratory, Harvard University

Date: 1941

Object number: VT0788

Cruft Laboratory, Harvard University

Date: 1941

Object number: VT0818

Cruft Laboratory, Harvard University

Object number: VT1075

Cruft Laboratory, Harvard University

Date: 1923

Object number: VT1102

Cruft Laboratory, Harvard University

Object number: VT0204

Cruft Laboratory, Harvard University

Object number: VT0197

Cruft Laboratory, Harvard University

Date: 1921

Object number: VT1021

Cruft Laboratory, Harvard University

Date: 1921

Object number: VT1020