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Page 77
9.3 Installing the Valve Bases
9.3.1 Wiring the Valve Bases
Now we'll wire the valve bases.
As you can see above, the valve base — viewed from the top — has 6 holes. Obviously, the holes at
the tips are for mounting the base to the chassis and the 4 holes in the middle are for the 300B pins.
Note that the 4 300B pin holes consist of 2 larger and 2 smaller holes:
this is critical to getting the
valve base orientation correct.
We will install the valve bases with the
larger holes nearest the Driver board.
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