Murphy Radio Model A30C From 1936
Shown above is the console version of the A30. This cabinet style is rather similar to the table version, including the “Chinese oval” speaker cloth. This marks a move away from previous years where the console version was markedly different from the table model (for example the A24 and A24C from 1934). For the console version of the A30 a small painted plywood back is included, which rather surprisingly incorporates minimal ventilation. Heat build-up at the top of the cabinet is potentially worse than in the table model of the A30, as the chassis is directly underneath the top of the cabinet since the speaker is mounted below the chassis. Hence the free air area found above the chassis in the table model is not present. To reduce the risk of heat damage to the veneers and surfaces above a metal chimney is included to direct heat from the rectifier and output valve out from the rear of the cabinet. Valve line-up is AC/TP, AC/VP1, AC2/PENDD, UU3.
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