Tips and Jottings

Radio Record, Volume IV, Issue 37, 27 March 1931, Page 15

Tips and Jottings

AN extra pair of "hands" for holding small work while it is soldered can easily be improvised by slipping a strong elastic band over the handle of a pair of pliers. HE golden rule of successful soldering is to keep the iron and work clean, and at the correct temperature. "THE numbers on a tuning dial have no direct relation to wave-length, but merely indicate the position of the moving plates in relation to the fixed plates.

ON very short waye-lengths of from 10 to 15 metres, long-distance transmission is best carired out in direct sunshine. ECHNT. research has shown that short-wave transmission is powerfully affected by spots on the sun. LL American broadcasting stations announce their call signs every fif-

teen minutes: except during radio dramas. (This is by ruling of: ‘the Federal Radio Commission. ) yy NEVER stand a grid-bias nets’ on live wires, terminals, ete. but instead mount it securely by means of a strip or strap, both for economy’s. sake and safety. GOOD way of mounting a frame aerial is to employ a heavy duty jack and plug, via which the contacts can be made. yy order. to get good raprodiictiani of the bass notes, it is important that the inductance of the low-frequency transformer primary should be high.