Murphy Radio Model A28RG From 1935
The A28C console described on the previous page was also available as a radiogram with a Garrard single play deck on metal copper anodised base plate. Unlike most radiograms where an incorporated top lid covered all radio and gram elements, the A28RG lid covers only the gram section of the instrument (see picture below left). The cabinet is a typical uncompromising R.D. Russell design, with some Art Deco leanings (note the solid square-finished post to the left upright of the cabinet and curved radius between the front right and side vertical of the cabinet). But it is in fact rather a brutal cabinet, with the large expanse of unrelieved veneered wood to the front with a circular grille cloth for the loudspeaker no bigger than the speaker itself.
The A28C and A28RG are notable as being the first Murphy receiver range to feature station names on the tuning dial, in fact the model A30 from a year later still did not feature stations on the dial. The dial on the A28C and A28RG is specially constructed so that parallax errors are avoided when tuning, by having the cursor at the same level as the dial markings. No other manufacturer did this, and Murphy only did it for this receiver. To be realistic, it probably wasnít worth the expense and trouble! This receiver also had other features like Noise Suppression and AVC, but is really noteworthy as being the first Murphy receiver that employed Automatic Tuning Correction, ATC. This was achieved using a Mazda AC/SP1 valve that measured any difference from the accurate IF frequency and applied an equivalent correction to the oscillator frequency thereby bringing the station into perfect reception. It is interesting operating this receiver, as the listener can hear the ATC circuitry at work, since it can take a couple of seconds to bring a station to maximum strength once the operatorís hand has left the tuning knob. Valve line up is AC/VP1, AC/TP, AC/VP1, V914, AC/SP1, AC/SP1, V914, AC2/PEN, UU3.
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