▼ Menu

B349

Sensibly equivalent to:
30L15 7EK7 PCC805
    
Extras ▼

 

The B349 is a low impedance high gain double triode designed for use as a cascode RF amplifier in VHF television receivers. The low voltage high current suggests a low noise design.
One of the triode sections can be seen end-on at the left of the image. The central structure is the inter-section screen.
The working part of each triode is small. The side flanges on the anode are there to help with heat dissipation.
The screen is easier to see in this image.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 46 mm tall.
References: Datasheet & 1040. Type B349 was first introduced in 1960.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
k(2)
g1(2)s
a(2)
h
h
g1(1)
k(1)in
k(1)out
a(1)

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
7
0.3
90
-1.2
15
3,100
9
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 30, 2015.
Return to Main Index