From lists@oceanbeach.com Mon Oct 12 10:52:50 2015
Subject:Re: Speakeasy vintage tube preamp schematic

> Quite often as it takes this path, it will connect the
> positive terminals of the two filter capacitors together. Google "pi
> filter” and you will find a schematic for this very common arrangement.

This was the clue I needed. Thanks, Wes!

Dave