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EY500A

 
    
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The EY500A is a colour television efficiency diode. It is the PY500A with a 6.3 Volt heater for AC sets using a mains transformer. It would probably be found in colour monitors that would connect to other equipment. In professional applications a non-isolated chassis would be a hazard.
Thanks to Jonathan Marsh for the image.
The wide glass tube envelope is 30 mm in diameter, and excluding the B9D base pins is 105 mm tall.
Reference: Datasheet. Type EY500A was first introduced in 1968.

 

Pin Connections
B9D
1
2
3
4
5
6
7
8
9
tc

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
6.3
0.3
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 20, 2013.
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