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Show How Pigtail Lead Will Increase Efficiency Pigtail connections are just as desirable de-sirable and necessary for a condenser as for a variometer or varlocoupler. In many condensers the rotor shaft makes contact by rubbing against a little brass or copper strip to which a crew or binding post Is attached for making connections. After' s period of use the point where the contact Is made becomes black, as you can verify by looking at your own condenser If you are using the ordinary type. This black coating prevents the rotor shaft from making good electrical contact with the brass or copper strip, and thus greatly cuts down the efficiency of the conductor. However, It Is easy enough to make your own pigtail connections for your condensers. Get a piece of Insulated Utsendrant wire, or the small flexible leads sold st all radio stores for making mak-ing battery connections, and cut off a piece about two Inches long. Clean off the edge of the rotor shaft where It makes contact with the brass strip and solder one end of the flexible flex-ible lesd to this clesned part of the rotor shaft. The other end of the two-Inch lead la then soldered to the screw or binding bind-ing post used for connections to other parts of the set This completes the "pigtail" and will greatly Increase the efficiency of the condenser. In many cases the pressure of ths contact atrip against the rotor shaft serves also to keep the rotor plates properly spaced b'etweeen the stator plates. It this Is the esse, the brass strip should not be removed, - but should be used In conjunction with the pigtail connection. |