Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 78606
United States of America (USA)
Brand: Concert Master Mfg. Co. (brand) - see also Continental Corp.; Chicago, IL and Newark NJ
Tube type:  Vacuum Pentode   Power/Output 
Identical to 257_concertmaster

Base UY-Base, 5 Pins (USA, April 1927)
Was used by Radio/TV-reception etc.
Filament Vf 5 Volts / If 0.3 Ampere / Direct / Specified voltage AC/DC
Description This tube was intended for use in the output stage of D. C. line operated receivers and was designed to give relatively high amplification and power output with low plate voltage (110) available for this type of service. National Union and Tung-Sol also made this tube. 
Dimensions (WHD)
incl. pins / tip
x 135 x 52 mm / x 5.31 x 2.05 inch
Information source -- Collector info (Sammler)   

concert_master_257_pins.png 257_concertmaster: 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