▼ Menu

NR87

Sensibly equivalent to:
AC5PenDD CV1196
    
Extras ▼

 

The NR87 is a double diode output pentode based on the AC5/PenDD. It was later renamed CV1196.
The pinch and getter holder.
The top mica with control grid heat sink and copper connection to the top cap.
The pinch and lower mica.
The classic envelope is 54 mm in diameter, and excluding the B7 base pins is 122 mm tall.
Reference: Datasheet. Type NR87 was first introduced in 1938.

 

Pin Connections
B7
1
2
3
4
5
6
7
tc
a(d1)
a
a(d2)
h
h
k
g2
g1

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
gm
4.0
2.0
250
250
-8.5
40.0
7.5
9.0
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated April 14, 2019.
shape:classic construction:pinch type:double.diode.pentode age:1930.1940 base:b7 heater:4.0v pins:7 pin:1.a(d1) pin:2.a pin:3.a(d2) pin:4.h pin:5.h pin:6.k pin:7.g2 pin:tc.g1
Return to Main Index