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

4H-20

Information - Help 
ID = 85437
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Current Regulator, Iron in Hydrogen 
Identical to 4H-20

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Filament
Information source -- Original-techn. papers.   Schematic to ID = 157575 Rogers 400 Combination


Just Qvigstad
Usage in Models 4= 1929?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):4
 

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