radiomuseum.org
Please click your language flag. Bitte Sprachflagge klicken.

257_concertmaster

Information - Help 
ID = 78606
       
Country:
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_tube_bm.jpg
257_concertmaster: Bob Millard collection
Fin Stewart

 
concert_master_257_pins.png
257_concertmaster: Fin Stewart
Fin Stewart

 

from 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]
  
rmXorg