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Philbrick Researches Universal Multiplier-Dividers and Operational Amplifiers

Currency:USD Category:Collectibles / Autographs Start Price:NA Estimated At:200.00 - 400.00 USD
Philbrick Researches Universal Multiplier-Dividers and Operational Amplifiers

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Auction Date:2019 Jun 12 @ 18:00 (UTC-5 : EST/CDT)
Location:15th Floor WeWork, Boston, Massachusetts, 02108, United States
ALS - Autograph Letter Signed
ANS - Autograph Note Signed
AQS - Autograph Quotation Signed
AMQS - Autograph Musical Quotation Signed
DS - Document Signed
FDC - First Day Cover
Inscribed - “Personalized”
ISP - Inscribed Signed Photograph
LS - Letter Signed
SP - Signed Photograph
TLS - Typed Letter Signed
Collection of six components manufactured by Philbrick Researches, including: two rack-mountable K5-M Universal Multiplier-Divider units, each measuring 19? x 7? x 13?, both filled with vintage vacuum tubes; and four Model UPA-2 chopper stabilized operational amplifier units, measuring 17? x 3.25? x 2.5?, each featuring several vintage vacuum tubes and one with a "Flowmeter Calibrate" knob. In overall very good to fine condition. Founded by George A. Philbrick, Philbrick Researches was responsible for the commercialization and wide adoption of operational amplifiers, or op-amps, as well as electronic computers based on them.