Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 78605
United States of America (USA)
Brand: Majestic tubes of Grigsby-Grunow
Developer: Majestic tubes of Grigsby-Grunow 
Tube type:  Vacuum Pentode   Power/Output 
Identical to G-59B
Similar Tubes
Different connections:

Base 7-Pin-Base U7B = medium, old, USA
Was used by Radio/TV-reception etc.
Filament Vf 2.5 Volts / If 2 Ampere / Direct / Specified voltage AC/DC

This tube was only made by Majestic and is not interchangeable with any other type. It is a triple grid power amplifier type. It differs from the 59 in that it has a direct filament. The base pin where the cathode would be utilised as in the type 59, is not used.

Acording to Tube Lore II, p. 28, the tube was available with a spray shielded bulb.

Dimensions (WHD)
incl. pins / tip
x 135 x 52 mm / x 5.31 x 2.05 inch
Information source 70 Years of Radiotubes and V.   p. 180
Tube Lore (II)   p. 28

majestic_g_59b_pins.png G-59B: Fin Stewart
Fin Stewart

Just Qvigstad


You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]

Data Compliance More Information