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QY3-65

Sensibly equivalent to:
4-65A CV1905 CV6122
See also:
QY3-65 Advert - VHF Power Tetrodes Advert - Valves at the Radio Exhibition 1955 - Audio Power Valves Advert
    
Extras ▼

 

The QY3-65 is a 65 Watt anode dissipation RF tetrode for use at up to 250 MHz. It is also rated for modulator or AF amplifier service in Class AB.
The cylindrical anode has ridges to aid heat dissipation as well as being carbonised.
The base uses five of the seven pins of the B7A design. As a professional valve it has gold plated pins.
The wide glass tube envelope is 51 mm in diameter, and excluding the B7A base pins is 95 mm tall. The skirt is 56 mm in diameter.
References: datasheet Type QY3-65 was first introduced in 1955.

 

Pin Connections
B7A
1
2
3
4
5
6
7
tc
f
g2
-
g1
-
g2
f
a

 

Absolute Maximum Operating Conditions
Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
6.0
3.5
2,500
400
-
190
-
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 15, 2016.
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