RECEPTION’S ENEMY

Sun (Auckland), Volume II, Issue 587, 13 February 1929, Page 14

RECEPTION’S ENEMY

RIDDING SETS OF DLST

Even when the cabinet of a ‘ les3 receiver is carefully consul and apparently effectively sea.' will be found that there is * for dust to accumulate on tie ponents. Although the duet itspractically non-conducting cause little trouble if kept dry. it tends to collect moisture, and fore causes serious short circuit- 1 the receiver. These short c.'result in noises in the speaker, l- | volume, flatness of tuning, M* '■ in the retpid deterioration oiltension batteries. The cleaning of a wireless often difficult owing to the «* cated nature of the wiring _ accessibility of some of the c ents, but it can be facilitated use of a vacuum cleaner, esP** it be fitted with a blower d en well as suction apparatus. Dust can also be blown n<® accessible parts of a cabinet by < of a motor-car or bicycle pu™ more constant source of c air can be obtained for this P inflating an old motor-ca 1- = and releasing the air con through a nozzle connected o __ valve piece by a length tU Admail, soft brush cf the by artists can be ihß the most inaccessible to caeinet. and will be in removing dust. m ho o!c ceiver special attention given to the vanes of )0 jf. densers. Dust is liable . tween condenser va “ e ®’_ 1 ans e Z i vanes are meshed it will , circuits berween the ; able plates. Unless s blowing device is used i dislodge. A slip of thm » cut to a convenient snap* times be slipped between vanes to brush out dusi. HEATING A.c. VAL'fc

It requires a half »*•«'^ ! for the valves of alternating ? I sets to become operative- | type of valve will WjJV quicker than that, a ]tt <•*. | element of the type -- bk 1 emit electrons until t heated. . lhe The current draw of & of valve is so high so& 't must be turned ° n **#*■' ! before enough heat ajjodfc for it to fully heat the