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6C9.

 
    
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The 6C9 is a VHF double tetrode designed for use as VHF RF amplifiers or VHF autodyne (self oscillating) mixers.
The 17C9 is the same valve electrically but has a 150mA heater for series heater chain use.
One tetrode showing the anode reduced to a band away from the working face.
The two sections side view. The grids can be clearly seen as can the central shield that connects to the second cathode.
The B9A base with additional central pin.
The thin glass tube envelope is 20 mm in diameter, and excluding the special ten pin base is 49 mm tall.
Reference: Datasheet. Type 6C9. was first introduced in 1962.

 

Pin Connections
1
2
3
4
5
6
7
8
9
10
g1(2)
g2(2)
a(2)
h
h
k(1)
g1(1)
g2(1)
a(1)
k(2),s

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.4
125
80
-1
10.0
1.5
0.1M
8.0
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated December04, 2014.
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