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E2657

 
    
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The E2657 is an M-OV experimental valve and has a serial number of 49. Our other E2657 has a serial number of 20. The construction suggests a low power EHT rectifier similar to the EY86.
The top cap connection to the bell anode. The support has to be substantial as it is the only fixing for the anode.
The heater was tested and took 6.3 volts at 0.12 Amps to produce an orange glow seen through the base and reflected off of the bottom metal cylinder.
The thin glass tube envelope is 21 mm in diameter, and excluding the base pins is 66 mm tall.
Reference: Observation.

 

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

 

Absolute Maximum Operating Conditions
Rectifier
Vh
Ah
6.3
0.12,
Updated March 04, 2013.
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