EF50 Pinout

Here is a pinout for the EF50 valve/tube. Remember, that the pinout of the valve must be mirror reversed (across the vertical axis), when transferring onto the B9G socket. There are two pins marked "s", which are for the internal shield. In this one valve radio project, they connect to earth. The centre stem part also has a clip terminal, which also usually connects to earth.

Pin Configuration

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