Well look at that… A Daven.

Penny & Giles, eat your conductive plastic hearts out.

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The tab at top is the cover lock; push it and turn to remove it for cleaning and service

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Big silver contact studs lead to the resistors inside.

In normal service these would be lubricated with Daven oil. This is a total mystery to me — it’s been out of production for decades, and I have no idea what a proper substitute would be.

The only other place I’ve seen rotary switches this hardcore are in avionics.

The Daven step attenuator was used in older broadcast consoles — I’m not sure on the details but I’ve heard that WVUM had one.

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