Useful Tips

Radio Record, Volume IV, Issue 27, 16 January 1931, Page 15

Useful Tips

TE you think that an anti-motor boating .device would improve your set, do not..be discouraged if there does not appear to-be room inside the set for it, as the wiring can in nearly all eases be done externally just as well as. internally. (COVERED wire which is made to pass through small holes in a screening box should not be relied upon to give sufficient insulation itself, but should be provided with a wrapping of insulated tape. ; [Tt is a good plan to include a flashlamp bulb in series with the condenser and loudspeaker of an output filter circuit, so that in the event of a condenser breakdown the small lamp will act as a fuse. TF one of your telephone earpieces breaks down remember that a wire across its two terminals will probably "restore" the phones temporarily, and enable you to listen to the conclusion of the programme on the one earpiece.

HEN readjusting a semi-permaneni crystal detector, remember that the contact consists of two separate crystals, and: these should not be ground together, but should be separated, and turned only: ‘when the two faces are: not. in: contact. S it is * difficult to. make perfecily. clean cuts through brags rods without spoiling the thread, a useful method is to affix one or two nuts to the rod beforé cutting it, so that when these are unscrewed the thread displacement is restored. [F your cone loudspeaker is enclosed ~ in a box and reception is a trifle "boomy," try .the effect of removing the back of the case, when, if resuits are improved, an open-work back is indicated. WHEN an aerial must of necegsity be supported against a wall, it should not be stapled to this, but should be fixed on "stand-off" insulators, SO that there is plenty of air spacing between the wire and the wall. [¥ you use a 6-volt accumulator cor sisting of three separate 2-volt sections, keep the cells properly connected in place before handing it in at the charging station, as if the connect: ing bars are removed they may be re placed wrongly.