Page 31 Advertisement 2

Radio Record, Volume III, Issue 19, 22 November 1929, Page 31

The 91 BLUE SPOT Patent Four Pole, Double Balanced Armature Driving Unit TYPE 66K Generally accepted by the technical press and trade as the finest movement available for driving 2 cone; the Blue Spot Unit standg unrivalled as a meang of providing faithful reproduction. If you are pushing any particular type of receiver, however good it i8, and whatever claims you make for it; you will find that your biggest selling help will be obtained by coupling to it a Blue Spot Unit: G8K is essentially a completely discharged 4-pole magnet unit which drives the cone spindle through a perfectly straight Jine move- ment: The special steel used for the magnet permits of an enormous fux, thus making the unit exceptionally sensitive: The armature -the only part liable to give 8 natural resonance ~has been carefully damped and is to all intents and purposes dead silent in action: The unit reproduces al1 audio frequencies from 50 to 7,000 cycles without giving undue prominence to either end of the register; G6K has a special adjustor for regulating the gap be- twecn the butterdy piece and the four poles of the magnet. 66K and 66P. Retail Price, 32/6 TRADE PRICES UPON APPLICATION: Sole NZ Agents : RODGER IMPORTING CO- LTD: 159 MANCHESTER STREET, CHRISTCHURCH