12_V_AT_10_A

Published:2009/7/17 1:55:00 Author:Jessie | From:SeekIC

Permits AC operation of 12-V FM transceiver. Article tells how to rewind 12-V TV power transformer rated above 120 W with No.12 enamel to get required 18-V secondary. If original winding has 2 turns per volt, new secondary will need 36 turns. Q1 is HEP233, HEP237, or similar transistor rated 10 A or higher, with heatsink, U1 is 25-A 100-PlV bridge rectifier, and U2 is National LM340K-12 regulator. CR1 can be any rectifier rated at least 3 A at 35 V. - L. McCoy, The Ugly Duckling, QST, Nov.1976, p 29-31.



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