Royal Radio: "Polle Royal" from 1926


 Above: the radio removed from its wooden case which has lost its paper label


 How it should look courtesy of Len Arzoomanian who runs a website about Radios from Rhode Island

click the three pictures below to see more...


 What the missing paper label should look like and a set complete with its 5 triode valves




 Upper and lower views of the baseplate. The shiny crosses are the valveholders.



 Above, another view of the baseplate showing the three coils which should be fixed to the rear of the tuning condensers




 Views of the three tuning knobs which need to be kept in step which necessitated keeping a log book in which you could record the settings for particular stations. Some receivers had a provision on the front of the set or on the lid for this purpose but increasingly, better manufacturing and assembly introduced single knob tuning and of course with the advent of superhet receivers only a single tuning knob was necessary.


Below... the model identification and the manufacturer





 Above: The filament knob, a rather coarse gain control

Below: The volume control knob

 Above: The filament rheostat

Below: The volume potentiometer





 The three identical tuning condensers with their three matched coils. These have been broken off their fixings. Note the adjuster screw on each condenser so the action of the control was stiff enough to remain in place in normal use.

 A tiny fixed resistor. The set has very few discrete components, relying on different battery voltage sockets for the different voltages required to operate the set.

 Above and below are the two intervalve transformers. These are designed to provide a measure of amplification within the receiver and use stamped iron laminations which were more efficient and much easier to manufacture than earlier types using iron wire.

 The set looks substantially complete and worthy of restoration. Key are the two transformers as often these can go open circuit because they use extremely thin wire which can fuse from valve failure or incorrect connection of the power leads. To bring back its good looks will involve a lot of careful cleaning and a spot of carpentry on the case.

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