Reader's idea
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THIS week's prizewinner is Mr. D. G. Doughton, of Oxton, Birkenhead, Cheshire, who repairs public service vehicles. He says that on the CA V 210 control board a type BCK cut-out is employed. This unit requires accurate setting up as there are two contacts which should make and break together. Mr. Doughton says that the simple
unit he made indicates by two bulbs what is going on. For the sake of convenience a C AV CRF flasher box and terminals were used—the two lampholders being mounted in the lid, wired as shown in the drawing.
To use the unit the terminal on the cut-out near the main contact must be lifted, then one side of the battery supply is taken to 33, one switch wire is connected to 18 and the remaining switch is taken to 21/32. Then, with an insulated feeler between the main contacts, the supply connected and the cutout armature pressed home, the auxiliary contacts can be synchronized quickly and accurately.
Continents Handyman: It is true that units can leave the works ill-set and early trouble can be experienced. The idea is a good one, but not all fitters have the knowledge to take it to these lengths. I would be inclined to keep this a skilled electrician's job, though I must compliment Mr. Doughton on beating the problem.