Description
The last ''classic'' looking HMV radio was the Australian made model 64-52. (This model was not manufactured by HMV in the UK).
It was a 5 tube radio with an internal ferrite rod antenna and an effective tone control. The large oval speaker (in association with the circuit design) produced a very natural and pleasant sound !
A 'feedback loop' in the audio output stage was provided by a 25 microfarad 40 volt electrolytic capacitor which was connected from the secondary winding of the speaker transformer to the cathode of the audio power amplifier tube, resulting in low audio distortion and better audio frequency range.
There are only three electrolytic capacitors in this radio. Two in the power supply and the 25 MF feedback capacitor in the audio output stage. The two original 16 microfarad electrolytics in the power supply have been replaced with two 22 microfarad capacitors.