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Show Tandem Condenser and How the Part It Made A variable condenser having 43 Platen cao be easily made Into tandem tan-dem condenser, composed of two 17-ptate 17-ptate sections, says a writer In Radio Newt. The condenser used for this purpose should be one of the tyi which la held together by three bolts, ao It can be taken apart Remove these bolts, being careful not to bend the plates, and cut the lon( bolta In half with a hacksaw. Before the condenser Is taken apart. It la best to measure the eiact distance dis-tance between the two end plates, so that the bakellte strips can be cut tor the exact length. This la necessary because the distance between the bear.-Ings bear.-Ings of the rotor roust be kept the same. In 17-plate condensers there will be 0 stator plates for each section. sec-tion. Since the rotora of a condenser In a R.F. receiver are connected to the "A lead, the rotor need not be aepa rated. OR MH0 jp" AATCJ 131 HARD RUBBfft. ! ' fg .. r BJWfUTC f3i -fXeWIDt 5TRIP5J , C g! AND XT " t?" METAL -J JHAllBOLTJ fofi-" INSULATION BETWEEN NiHrljV RrR AN SIAT01 How to Construct Tandem 17-Plat Condenser From 43-Plate Condenser. Assemble the two end plates and place them on the table, at the same distance apart as they were originally. Measure the distance between the Inner In-ner edges and make the separators this length. In Fig 1 the separators are of bakellte rods, drilled and tapped to the size of the condenser bolts. The method of assembly Is clearly shown In the diagram. One separator Is nsed for each holt, and for most condensers three will be required. re-quired. This Is a neat method but a little dillicult. A similar method Is shown In Fig. 2. This will be found to be excellent If the hakelite remains firm, but the construction con-struction Is not as strong as that shown In Fig. 3. Here the two stators are supported by three bakellte strips, about H Inch thick and Inch wide, and Just as long as the condenser was originally. Four small metal brackets are bolted on each strip and then to the stators by means of the original bolts cut In half. The live center plotes of the rotor should be removed and cut down to washers. Replace these washers In the original positions nnd the rotor will be the same length as before. Thus the two rotors are one, electrically elec-trically speaking. |