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Show f .jrtfc I OsoUtcr Z W RW' A If you have a nonregeneratlve receiver and you desire to listen into pure CW code signals, the above method will be the solution. L1 consists of 60 turns of No. 22 DCC wire wound on a 32-lnch tubing and tapped at every third turn. C1 Is .0005 mfd. variable condenser. The arrow coming from the A minus Is the only variable portion of the coll and goes to the 16 taps. By varying these taps, closer or looser coupling between the plate and the grid on be obtained. Use a UV 201A tube with 674 volU Ml the plate. Radio World. |