[Boatanchors] Strange Drake Power supply

[Michael Tallent]

I have a power supply with no printed info on it.  It is the size of the
AC-3,4 and has a power transformer similar to AC3,4 but it has only 1 metal
can capacitor on the chassis, and a large filter choke wired into the HV
supply.  It all looks original with not extra holes.  The bias pot is on top
near a corner and all the filter caps are inside the chassis.  Someone wrote
on the side that it is a AC-4, but I have both the AC-3 and the AC-4 and it
is not like either.

Did Drake make a third version of this type of power supply?

The filter caps are bad and I will replace them all.

It is the same size and has the mounting points in the bottom plate to
attach inside the MS4 speaker.

Mike Tallent W6MXV