Antique radios, Old Time Radios

38

ID = 3111

Country:

United States of America (USA)

Brand:	Common type USA tube/semicond. Common type USA tube/semicond. Canadian Marconi Co. Ltd. (CMC, Esterline), Marconi's Wireless; Montreal, QC Philco, Philadelphia Stg. Batt. Co.; USA Raytheon Mfg. Co.; Cambridge, MA Sylvania (Hygrade, GTE, Nilco); Emporium (PA) Triad Television & Mfg. Co.; Pawtucket, RI
Tube type:	Vacuum Pentode Power/Output

Identical to

38 = UY38A = ER238 = VT-38 = PH238 = NY-68 = UY38 = UY238 = NU-38 = 138A = RYB238 = T-38 = NU-238

Similar Tubes

Normally replaceable-slightly different:

38038 ; 438

Other class quality (otherwise equal):

CV712

Other characteristic (electr. data):

NY-68A

Multiple differences or of other kind:

6Z-P1 ; 6ZP1

First year

1930 -- Collector info (Sammler)

First Source (s)

Jun.1931 : -- Collector info (Sammler)

Successor Tubes

Base

UY-Base, 5 Pins (USA, April 1927) (Codex=Hfo) Top contact with a cap.

Was used by

Radio/TV-reception etc.

Filament

Vf 6.3 Volts / If 0.3 Ampere / Indirect / Specified voltage AND current AC/DC

Description

We believed that the tube is from 1931, but some models indicate 1930. Who knows more?

Tube prices

1 Tube prices (visible for members only)

Information source

Essential Characteristics, GE 1973
Taschenbuch zum Röhren-Codex 1948/49

38: Internet Miguel Angel Trujillo-Rodriguez More ...
38: Telefunken Werkstattbuch Wolfgang Bauer More ...	Just Qvigstad	38: Sylvania Technical Manual Peter Hoddow More ...

Usage in Models

2= 1930?? ; 2= 1931?? ; 6= 1931? ; 34= 1931 ; 7= 1932?? ; 50= 1932? ; 58= 1932 ; 14= 1933?? ; 15= 1933? ; 39= 1933 ; 16= 1934?? ; 10= 1934? ; 50= 1934 ; 8= 1935?? ; 4= 1935? ; 32= 1935 ; 11= 1936?? ; 18= 1936? ; 18= 1936 ; 7= 1937?? ; 15= 1937? ; 7= 1937 ; 6= 1938? ; 7= 1938 ; 3= 1939?? ; 3= 1939 ; 3= 1940?? ; 1= 1940 ; 2= 1941? ; 1= 1942?? ; 1= 1946 ; 1= 2020

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):451

Collection of

David Erali (USA)

Robert Gillespie (USA)

Bruce Morgenstern (CDN)

Baptiste Hobbe (CDN)

Christian Schaufelberger (CH)

David Pfister (CH)

Patrice Follet (F)

Justo Puertas-Paule (E)

Benedetto Pirani (I)

Collection of a member from FIN

Tor Steinnes (N)

Carlos A. Pieroni-García (ROU)

Valery Gromov (RUS)

Peter Pfeiffer (D)

Forum contributions about this tube

Threads: 1 | Posts: 1

Hits: 382 Replies: 0 Output pentode type 38
John Dodgshun 05.Sep.21	1 Output pentode type 38 According to John Stokes, 70 years of Radio Tubes & Valves, the 38 was first introduced in July 1931.

38
End of forum contributions about this tube

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38

Common type USA tube/semicond.

Collection of