Tuesday Tube : Western Electric 418A

Main reason that select this tube to work as driver for my amplifier

http://mellowgroovy.blogspot.com/2015/11/WEamplifierPart2.html

because it is a Western Electric tube that look like an expensive WE437A too much.

WE418A is an indirectly heated tetrode tube. Use 9 pin Magnoval socket.

Same base and bulb like WE437A and WE436A too.

Frame grid construction.

Square getter.

I've found this copper tube shield in ebay, it's look tight and rigid.

Keep it for my WE437A triode tube in the future. ;)

Tube shield inside with spring all around. Great design and usable.

Later version of WE418A had smoke glass and different font.

When I made a decision to use WE418A,

I'm searching more information and specification in google.

No triode curve from any sites. Only question but no answer.

Until I've found triode curve from project in MJ Audio magazine for February 2015 !!!

Plate Characteristic for triode connection of WE418A tube.

Characteristic & typical operation.

Sound of WE418A in triode connection so flat and powerful, 

easily match with almost power tube especially directly heated triode.

You can get the same feeling like looking and listening to WE437A. ;)

Cheer!