Philco model 252 originates from
1932-1933. Electrically this model is equivalent to model
224 and is, according to the printed text ("EXPORT") on
the bottom of the chassis, obviously produced in the USA for
export to Europe. USA sources (Rider's manuals, Philco
books or databases) do not make mention of this model. I am
very much interested to know more about the history of this
The housing is a wooden cabinet of the well known cathedral type.
Tubes employed: 36, 44, 36, 42 and 80.
Chassis after partial restoration.
The radio had the following main defects:
1. audio output tube replaced by an EL33 (so original socket
replaced and wiring modified)
2. original speaker (with field coil) replaced by a
3. PU entrance removed
4. original front replaced
5. coil housing dented.
I dismantled the radio until the last screw and piece of
wire. The chassis was cleaned and the top was coated with a
zinc spray. The variable capacitor and padders were
dismantled, cleaned and remounted. The same story holds for
the RF and IF coils, the capacitor block and trimmers. The
block condensors were emptied and provided with new
components. Thereafter the blocks were sealed again with
The dent in the coil housing was removed by carefully pressing a
wooden model of the proper size into it.
Many resistors were too far off-value. Most of the time
they were too high and I corrected their value by mounting a
small size resistor with the appropriate value in parallel.
In the meantime the radio is fully electrically restored and it
functions quite well.
Only the volume control does not function properly. The
volume potentiometer has a total resistance of more than 800
kohm. Judging from the schematic, this value cannot be
right. Unfortunately the schematic does not mention any
Chassis after full restoration