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6146B

Sensibly equivalent to:
8298A
    
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The 6146B is a variant of the popular 6146 HF power beam tetrode. The 6146B was designed for mobile transmitters and the heater was designed for a wide range of input voltage and not just the 10% around the nominal 6.3 Volts.
The 6146 family first appeared in 1952 with the A and B variants following later in the decade.
The original etched Type is the 6146B and the secondary printing also says 6146B plus it has the equivalent 8298A as well.
The anode connects to the top cap via a thin shaped sheet of metal. The two halves of the anode are stitched together. The anode would be formed by a single machine that cut folded and stitched the two halves together. The anode is made from nickel sheet.
The wide glass tube envelope is 38 mm in diameter and excluding the IO base pins, the valve is 80 mm.
References: Datasheet & 1040.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
tc
k,bp
h
g2
k,bp
g1
k,bp
h
m
a

 

Absolute Maximum Operating Conditions
Beam Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
mAg
Pdriv
Pout
Pdiss
freq
f.max
6.3
1.25
600
150
-58
112
9
2.8
0.2W
52W
27W
60
175
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated July 22, 2017.
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