Here are a couple of early Car Radios

 Mystery Car Radio

 From the picture evidence that follows this set was made between 1945 and 1949.




 Certainly some WW2 surplus parts have been used...








 Missing vibrator... did the failure of this part see the demise of this particular radio?

 Above... a standard commercial tuning coil..

 Typical medium-wave tuning dial markings used in the USA?


 Ekco CR32 Car Radio

 This model, weighing in at a hefty 13 pounds, was manufactured in 1947 around the same date as the one shown above, but has an Ekco badge which allowed me to discover more details. The right hand control selects one of six preset stations and the left has a wavechange, Long/Medium plus volume control. The knobs have been replaced. The set was donated by Fred Hooper.
   The Scottish Ekco factory has now long since been demolished but its site is still visible on derelict land between the M74 and Cambuslang Road in Rutherglen near Glasgow. The reason the factory was built in Rutherglen in 1940 was that the main Ekco factory in Southend was thought to be vulnerable to German bombing.
 The set was designed around Mullard "E20s" valves, a type with a metal B8B base using a 6.3 volt heater. The B8B base has a central metal pip that engages with a strong spring in the valveholder to prevent the valve falling out if bumped. HT was supplied by a Plessey non-synchronous 12 volt vibrator to the left of the large squarish metal can. Mounted on the front panel is a small Goodmans loudspeaker.

 The valve line up is ECH21, EF22, EF22, EBL21 and what looks like a 6X5 rectifier. This is awkward to get at but has the label "Brimar BVA" and "6" with the remainder worn away. I don't have a circuit diagram for this set so can't say how the designers managed to wire the valve heaters for 12 volt operation as each type has a different current rating.

 Considerable car has been taken to shield the sets innards from ignition interference. Above you can see the removeable panel has metal fingers for earthing the sides and the outer case is internally copper plated and has copper fingers around the periphery to help with screening.

 As you can see there's plenty of scope for refurbishment...

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