I don't believe this set, made in
early 1939, was designed to be a portable radio because it's
pretty heavy and has no means of carrying it, such as a handle.
It was probably aimed at customers without a mains supply and
to sell more Ever Ready batteries. Anyway, bakelite would not
be the ideal material for a portable radio case. Actually Ever
Ready did make a portable radio using the same design as this
table model. It was the Model 5214 whose details are recorded
below. I have one of these
sets which you can see here...click the link I need to extract
the chassis of this set from its case and either clean or replace
the old plexiglass dial cover because its now so cloudy that
the dial markings cannot be seen clearly.
Here's the rear view with the cover
removed and you can see that Ever Ready not only made batteries
and radios but valves as well. Despite the obvious deterioration
due to damp the valve metalising still looks to be in perfect
condition. Often when metalised valves are kept in damp conditions
the covering falls off. The shape of the valves is slightly unusual
and the lettering somehow looks foreign. Maybe they were made
elsewhere in Europe?
The set has a frame aerial
wound on a plywood former mounted inside the cabinet and the
valve lineup should have been as follows:- Frequency changer
DK1, IF amplifier DF1, detector & audio amplifier DAC1 and
audio output DL2. All have 1.4 volt filaments.
However, at some time in its
life, almost certainly around 1955 the set needed a couple of
new valves and, because side contact types were quite rare and
probably pretty expensive in the UK, two replacements were fitted.
These were a frequency changer type 1A7, also marked "DAR10
and Foreign" and a detector/audio amplifier type DAC32.
Because these valves use International Octal bases the valve
sockets were changed from side contact to a pair of octal sockets.
These are marked "Radiospares", the company now known
as RS components, which were supplying components branded as
such from 1954. Radio sets were very expensive back in the 1950s
so changing a pair of valveholders and adding two new valves
was a worthwhile proposition. Nowadays that exercise would be
out of the question. I must admit to having heard of a 1A7 valve
but not a "DAR10" but after thinking about this for
a few minutes the penny dropped... the marking is "DARIO",
a trade name of Philips..
What I'd read as a number 10
is in fact letters I and O.
The battery was a 1.5 volt plus
90 volt connected by that 4 wire lead, and because it's not a
mains set the loudspeaker is a permanent magnet type.
These Trader Sheet pages
give the details of the portable version of the 5318 table model.
Click either and you can see the PDF version.