Page 5 Advertisement 1

Radio Record, Volume I, Issue 22, 16 December 1927, Page 5

The Wonderful (M# 'JFDi RM PM Filament Rm2 PM: 1 (FIF ), 0.1 amp 'For tzuo volt. accmnilator P.M. 2 (Powver) or dry cclls_ For 2-volt acc1_ Pricc 13/6. 'n 10 la t 0r 4, 0.15 anps. B3a amp1 FoL;vo: That $ the Secret Price 13/6, zolt accuanulator or dry cclls. Price 13/6. of the Mullard Valvel ~the secret of the Mullard' s magnificent volume ~its majestic power ~its pure undistorted repro- duction -its extraordinary economy and its all round efficiency. For the PM Filament is the greatest improvement in Radio since the valve superseded the crystal: PM 5 So tough that it can be tied in knots even after 1000 hours use. Result ~safety against accidents. PM: PM. 3, 0.1 amp. It has up to three times greater length and up to {Generalc "raloPur bccer five and a half times greater emission surface than: PM. 4 (Power)', mulators Or dry an ordinary filament;' For 4-volt accuinul cclls_ lators Ot 3 dry Price 13/6. cells, 0 1 amb And requires only one-tenth ampere to operate Price 13/6. efficiently_~a dying match generates more heat than a PM. Filament_~result, low current consumption. Truly the Mullard is {The Key to perfect and economical radio reception: Muilr) '(Muilac' There's a Mullard P.M. Valve for every holder PM 5 in your set: PM6 OBTAINABZE FROM ALL GOOD RADIO PM. 5 (General Purpose) , 0.1 amb DEALERS. PMa 6 (Power) _ For 6-volt accu- For 6-volt accll mulator or dry mulators or 4 dry cells. cells, 0.1 amp Price 13/6 Price 13/6. Mullard THE MASTER VALVE Q "(MULLaHbi (Miiur# P M If unable to obtain write NZ: Selling Agents: PM 254 256 SPEDDING LTD Bzv; 254 (4 volts, Christchurch, Box 922; Dunedin; Box 576; P M. 256 (6 volts, amps: ) . Swbcr- 0.25 amps: ) Suber- bozvcr valves for p owver zalves for; tast LF stages Wellington, Box 1581; Auckland, Box 462. last LF_ stage. Price 15/- Price 15/" NEW TXPES PM 1A; PM 3A; PM 5B_ DU/2 and DU/10. These special valves have been produced to Specially designed for rectifying purposes in meet the demand for Resistance Capacity Coupling Battery Charges or HT Supply Units. as it has long been realised that such gives the purest reproduction of broadcast speech and music, owing DU/10 is a half-wave rectifying valve requiring to its distortionless amplification: volts across the filament and consuming 1.1 amps: PM 1A is a two volt valve. DU/2 is a full wave rectifying valve requiring 'PM 3A is a four: volt valve. 4 volts across the filament and consuming 1.1 amps: PM SB ig & six volt valve. Ma Prices : DU/10, 17/6 each: and all may be:used either with dry cells or accumu- lator; Prices 13/6 each DU/2, 25/- each;