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“Baby Will” Valve Junior Conversion
Version 4
Build Manual
22 September 2009
8 of 36
5.2 Remove the EVJ’s Stock Components
A few of the stock EVJ parts have to be replaced. The tubes, tube retainers,
stock circuit board, and output transformer need to be removed.
5.2.1 Remove the Tubes and Tube Retainers
It’s as simple as:
•
lift the tube retainer off the power tube,
•
turn the retainer shield until the spring lifts the shield off the per-amp tube,
•
pull the tubes out, and
•
unclip the power tube retainer.
These items can be discarded. They will not be used later in the build.
Now that the tubes and their hardware have been
removed we can take a look inside. This is a version 2
EVJ. You can tell by the green board and the rectified
DC heater supply. Version 3s have a black board.
5.2.2 Remove the Output Transformer
To remove the output transformer,
disconnect its wire leads from the main
amp circuit board and the output jack
circuit board.
You don’t need to label the
leads since this output
transformer won’t be used
later in the build. However,
it’s recommended to label
them just in case you want
to use it in another build at a
later time.
Pull these two spade connectors from the main circuit board.
