VIRTUAL  MUSEUM

 

COLLECTION  OF  HISTORIC   EQUIPMENT   AND   COMPONENTS

 VACUUM  TUBES

 UNDER  CONSTRUCTION !

UV201A HISTORY

 

 

The AUDION versions of Lee de-Forest have been improved by RCA with a more reliable tube, the UV201. UV= is the UV type base, 2=is RCA. It was with Tungsten filament and amplification factor of 8. The filament power was 5 Watts (5V 1A). The filament power for a battery operated 5 tubes TRF receiver of the 1920's, required 25 Watts with UV201 tubes.

 

To reduce the filament power, RCA developed the UV201A, in which the filament was coated with oxide. This increased the electrons emission tremendously. The filament current was reduced in the UV201A to 0.25A and it became the most popular Triod in the TRF radios of the 1920's. Other manufacturers marked their UV201A versions with their prefix, ending with 01A.

© 2023 by Success Consulting. Proudly created with Wix.com                TELECOM MILESTONES Along the History of TELECOM and Electronics Technology

Telecom Milestones

CONSTRUCTION WITH VACUUM TUBEs

Hobyists and radio amateurs that constructed Home Brew vacuum tubes receivers and transmittrers, required tools for producing the metal chassis.

 

The main problem was drilling the large holes for the tube sockets. The Socket Punch Set in the pictures is one of the popular sets in the 1950's.

TUNGSRAM EM-32

 

MAGIC-EYE

 

Tuning Indicator

 

          5Z4G                           6K6G                    DH63 (6Q7G)                    6K7G                        6K8G

NIXIE TUBE VALVO ZM1022

NEON 7 SEGMENT DISPLAY TUBES

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