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DY86/87

Sensibly equivalent to:
152A 1S2 1S2A DY86
See also:
Valves and their Habits
    
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The DY86 is a television EHT rectifier from 1956. It was designed to have its heater supply produced by an overwind on the line output transformer. The 18,000 Volt rating places this as a rectifier for medium sized monochrome televisions.
The construction of this DY86/7 is different from the standard version of the anode bell near the top cap and the bell being open at the bottom to admit the heater/cathode. Here the anode is brought lower and is partly enclosed by a guard ring. This format would limit the release of soft X-rays.
Although distorted by the glass the anode bell can be seen to sit within the cup of the screen.
The thin glass tube envelope is 20 mm in diameter, and excluding the B9A base pins is 68 mm tall.
References: Datasheet & 1040 Type DY86/87 was first introduced in 1955.

 

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

 

Absolute Maximum Operating Conditions
Rectifier
Vh
Ah
Va
mAa
1.4
0.55
18,000
0.15
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 07, 2016.
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