Tips and Jottings

Radio Record, Volume IV, Issue 35, 13 March 1931, Page 17

Tips and Jottings

WHEN overhauling a set which has been put ‘away for some time and which is being reconditioned, do not forget the grub screws on the panel controls will probably have worked loose and will need tightening. A PANEL which has been stood aside for some months may show signs of greyness, but this can generally be removed by a light application of mineral oil, and patiening with a soft, clean duster, Seed A: good stain for ‘darkening base- "" poards may be made from a solution of permanganate of potash, F a cabinet has been scratched badly so as to reveal the white wood, eareful treatment with a solution of permanganate of potash will often restore the colour, and enable the seratch to be hidden. is a good rule never to discharge an accumulator: at a rate of more than ‘one-tenth of its actual ampere hour capacity. (A twenty actual hour accumulator should not be called upon for more thdn two amps., etc.) QWING to evaporation the level of ~~. the liquid in an accumulator falls in time, but it should not be allowed to go lower than a quarter of an inch above the top of the plates, when loss should be made good by adding a little distilled water. To connect the ’phones the wrong way round in a _ valve receiver tends to demagnetise a and make them insensitive.