Tips and Jottings

Radio Record, Volume II, Issue 27, 18 January 1929, Page 27

Tips and Jottings

Oiling the Pulley. ERE is an ingenious way of doing an awkward little job, that is, oiling the aerial pulley at the top of a mast. This is done simply by tying a length of three or four inches of cotton wool or felt to the rope and soaking this cotton wool thoroughly With oil, then letting the aerial down

until the felt lies over the pulley and applying tension so as to squeeze the oil out of the felt against the pulley and leaving it to run into the bearing. 3 Humming Noise. [fF you are troubled with a regular humming noise, and your set employs a low-frequency transformer, try changing over the leads to the primary, or those to the secondary. An Unusual Trouble. Mice which find convenient nesting quarters in radio receivers are in danger of their lives. This was demonstrated after a set owner became much chagrined when his speaker quit work. Aid of a service man was sought, and investigation revealed a nest in the receiver containing three dead mice. The mother had built the nest between two B battery wires carrying 185 volts. A short circuit developed with fatal results to the mice.