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ID = 1059
United States of America (USA)
Brand: Raytheon Mfg. Co.; Cambridge, MA
Tube type:  Diode-Pentode   Audio Frequency 
Identical to 1AJ5
First year 1953 Beitman Radio Diagrams, Vol. 13, 1953 Motorola CH= HS-347
First Source (s)
16.Aug.1954 : Electron Tube Registration List

Base Subminiatur (wire-ends, flat) B5A
Filament Vf 1.25 Volts / If 0.04 Ampere / Direct / Battery =

The tube 1AJ5: 16.Aug.1954 : Electron Tube Registration List. But the Beitman Manual of 1953 brings a Motorola-chassis HS-347 with models 53LC (1, 2, 3) and therefore 1953 seems to be correct.

Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
9 x 38 x 6 mm / 0.35 x 1.50 x 0.24 inch
Weight 3 g / 0.11 oz
Tube prices 1 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
  1AJ5: W.W.Diefenbach
Günther Stabe
1AJ5: KS
Keith Staines

1AJ5: W.W.Diefenbach
Günther Stabe

1AJ5: Essential characteristics
Peter Hoddow

from Just Qvigstad

Usage in Models 5= 1953 ; 7= 1954? ; 3= 1954 ; 9= 1955? ; 7= 1955 ; 9= 1956? ; 11= 1956 ; 1= 1958?? ; 1= 1958? ; 5= 1958 ; 1= 9999

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):59

Forum contributions about this tube
Threads: 1 | Posts: 2
Hits: 1049     Replies: 1
Market introduction date 1953
Mark Hippenstiel

The series consists of:

  • 1AG4 Output Pentode
  • 1AH4 RF Pentode (April 1951)
  • 1AJ5 Diode-Pentode (August 1954)
  • 1V6 Mixer Pentode / Oscillator Triode (April 1951)
  • 1AK4 RF Pentode
  • 1AK5 Diode-Pentode

Namely the 1AJ5, registered in August 1954, was on the market a year earlier already. Raytheon has advertised this series in the January / February 1953 issue of Communication Engineering and in the March 1953 issue of Tele-Tech & Electronic Industries (see attachment, same ad for both publications).

The Tung-Sol Elekctric Inc data sheet for the tube is dated September 1, 1953. First sets appear end of 1953 e.g. with the Motorola HS-347 chassis.

Obviously, the registration for 1AJ5 was late and has to be marked as erroneuos. In my opinion, it cannot be reliably used to determine the year of a model release.

Kind regards,


Wolfgang Gebert

this ad was also published in Electronics, February 1953 p.33

End of forum contributions about this tube

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