Market introduction date 1953

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,
Mark

• Raytheon Advert (217 KB)

To thank the Author because you find the post helpful or well done.

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

To thank the Author because you find the post helpful or well done.