▼ Menu

PM3

Sensibly equivalent to:
CV1151 NR15
See also:
The Philips-Mullard (PM) Series - Mullard PM3 Box - Mullard PM3 Box - CV1151 short entry
    
Extras ▼

 

The PM3 was introduced in 1926 as a general purpose triode with a μ of 14. The filament current, initially 0.1 Amp was later reduced to 0.075 Amps and the label on this specimen specifies 0.075 A filament current. Our other PM3 is an earlier example and consumes 0.1 A filament current at 4.0 V.
The identification details are printed on the dome of the envelope. looking from the base up under the silvering on the glass reveals a horizontal box anode.
This is supported from the pinch by stout wires that form a wide U. The anode is stippled.
The balloon envelope is 43 mm in diameter and, excluding the B4 base pins, is 87 mm tall.
References: 1931 datasheet & 1004 Type PM3 was first introduced in 1926.

 

Pin Connections
B4
1
2
3
4
a
g1
f
f

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
ra
gm
4.0
0.075
125
16,000
0.85
Thanks to Andy Cowley for supplying the above PDF datasheet.
Updated April 04, 2015.
Return to Main Index