[Boatanchors] Setting Up a BC-348-R Receiver

[Roger Ruszkowski]

Matt,

As the unit come from Europe, You may want to ask about the line voltage.
A lot of Europe is on 220 volt.
Just because you have a line cord does not mean you can just plug it it,

If it still has the 28 Volt Dynomotor, these can be rebuilt.
The DC motor has carbon brushes. these wear out in time.
Stock motor brushes from drills and such can easily be sanded / filed down in size to fit.

A 24 volt transformer and full wave bridge with some filter caps will make up a nice 28 volt source for the
Dynomotor if you need it.

Some of the tube filament strings run on the 28 volts and the dynomotor just makes up the B+.

You may want to run this whole receiver off DC from a remote power supply and use lots of good filtering
in that remote power supply.

These receivers were powered from DC sources. 
Thus not a lot of 60 hertz filtering in them. 
They had lots of RF filtering for the generator whine and the big vehicle battery is a lot more
capacitor filtering than we usually think.

The AC filament hum on a couple early low level stages even if not noticeable in the audio output can 
raise the noise level and decrease the sensitivity.

Good luck with it and hope you enjoy it.

Roger AI4NI