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Neotron EF95=6AK5 ...
Neotron EF95=6AK5 ...
USD$8.14
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STC / ITT 5A/180M ~436A, similar to 3A/167M,437A E55L,UK made,Best! USD$92.13/per piece
Stock : 8 pcs.
Status : NOS
Box : Sealed! OB

Descriptions :
STC 5A/180M
NOS
TESTED AS NEW
GOLD PINS , BLACK PLATES
MADE IN UK
SEALED ,WITH ORIGINAL BOX,IN PERFECT CONDITION

PENTODE; TRIODE CONNECTED =>HIGH GM 32 MA/V; u=30; PW=6W
SIMILAR TO WESTERN ELECTRIC 436A ,WITH DIFFERENT BASE
HIGH GM,SIMILAR TO 3A/167M, 437A,EC8020,E55L ,BUT NOT INTERCHANGEABLE!

For reference : some testing information of 5A/180M found in internet:
Testing conditions:Voltage Anode = 175v , Voltage Screen = 150v,
Voltage grid = Set to appropriate value to get 25mA anode current.
The test results=> Tube 1 : Vg -1.70 Gm 34.0 mA/V ;
Tube 2 : Vg -1.85 Gm 33.0 mA/V ...etc

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