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EY86

Sensibly equivalent to:
6S2 CV2966
See also:
Valves and their Habits
    
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The EY86 is a television EHT rectifier is rated in terms of peak inverse volts (PIV) and that is quoted at 22,000 Volts. If fed from a sine wave the anode voltage would be limited to just under 8,000 Volts, but driven from the positive peaks of the line output transformer the rectified voltage can be about 17,000 Volts and pulse input was a design feature. This is sufficient for a medium sized black and white TV.
The EY86 on a B9A base was a development of the EY51 wire ended design. This exhibit is not gettered, unlike later production of this design.
The maximum reservoir capacitor for use with this valve is 0.002 µF, normally the capacitance of the CRT itself is used as reservoir.
The anode is a cylinder closed at the top and firmly fixed to the top cap. The cathode assembly is not visible due to the presence of the shield. The latter helps to prevent radiation of harmonics from the spiky input waveform.
The anode hangs from the top of the envelope. The cathode and screen has a multi-point connection to the base pins.
The base of the anode is inside the screening ring.
The screening cylinder has a single hole for the heater lead. The tempered pins are brought to a point.
The thin glass tube envelope is 22 mm in diameter, and excluding the B9A base pins, is 62 mm tall.
References: Data-sheet & 1040. Type EY86 was first introduced in 1956. See also 1956 adverts.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
tc
h,k,s
h
nc
h,k,s
h
h,k,s
nc
h
h,k,s
a

 

Absolute Maximum Operating Conditions
Rectifier
Vh
Ah
mAa
6.3
0.09
0.8
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 04, 2022.
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