Alle Röhren vom Hersteller: Purotron (RCA)

In der Gruppe dieses Herstellers, sind ebenfalls folgende Einträge vorhanden:

• → Admiral (by Sylvania)
• → Amperex
• → Amperite
• → Arcturos Radio Tube
• → Ates
• → Beam Tube Corporation
• → Beckman, Made in USA
• → Burroughs
• → CBS
• → Cetron Electronic Corp.
• → Chatham Electronics
• → Continental Electric
• → Cunningham
• → DeForest
• → Delco
• → Dumont
• → Eico
• → Eimac
• → Electronic Enterprises Inc.
• → EMI
• → Gammatron – Heintz & Kaufman
• → General Electric
• → General Electric Medical Systems SA
• → Heintz & Kaufman
• → Hewlett Packard (By RCA)
• → Hytron
• → ITT
• → ITT Standard
• → J.F.D. Manufacturing CO. (USA)
• → James Knights Co.
• → K-R Tubes Inc.
• → KEN-RAD
• → Lowrey
• → Magnavox
• → Marshall
• → Mazda Radio
• → National Electronics
• → National Union Electron Tube
• → NRC
• → Purotron (RCA)
• → Raytheon
• → RCA
• → Reliable
• → Rogers
• → Slater
• → Standard Electric
• → Standard Telephones & Cables Ltd.
• → Sylvania
• → The Fisher (Fisher Radio Corporation, New York)
• → Thermall R-I
• → Trans Radio
• → Tung-Sol
• → United Electronics
• → USA (Alle Varianten)
• → Welsh Electric Lamp Corp, Newark NJ
• → Western Electric
• → Westinghouse
• → Wincox-Gay
• → Z & I Aero Services Ltd. (Zaerix, USA)
• → Zenith (USA)