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PM1HL

Information - Help 
ID = 14610
       
Country:
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Triode, vacuum   Universal 
Identical to PM1HL
Similar Tubes
Normally replaceable-slightly different:
  210HL_Cossor ; CV3641 ; VT50
Other characteristic (electr. data):
  PM1 ; PM1A ; PM1HF ; PM1LF

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Filament Vf 2 Volts / If 0.1 Ampere / Direct / Battery =
Description Medium Impedance Triode. Ri=22.5k, Gm=1.2mA/V at Va=150, Ia=2.3mA, Vg=-1.5V.
Clear or metallised bulb.

The 1933 Mullard data optimistically calls it "Non Microphonic Detector" and "...Complete freedom from microphony"
It is also therein suggested as being suitable for the RF and IF stages. 
Literature Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   
 
pm1hl.jpg
PM1HL: own collection
John Koster

 
1_102.png
PM1HL: Telefunken Werkstattbuch
Wolfgang Bauer

 
pm1hl_techdat01.png
PM1HL: Mullard Valves 1936
Peter Hoddow


Usage in Models 1= 1926 ; 1= 1929?? ; 3= 1929 ; 3= 1930 ; 23= 1931 ; 1= 1932?? ; 12= 1932? ; 5= 1932 ; 3= 1933?? ; 17= 1933? ; 6= 1933 ; 1= 1934?? ; 6= 1934? ; 8= 1934 ; 1= 1935?? ; 2= 1935? ; 5= 1935 ; 2= 1936? ; 4= 1936 ; 2= 1937 ; 2= 1939 ; 1= 1940

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):109


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