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Thanks to Barrie  C. Hiern

Schematic of a early Drake AC-3 power supply, serial number 296.

(c) 1998-2012 D. PRODUCTS SA/NV - DRAKE is a registered trade mark of R.L. DRAVE COMPANY
No copy of text or image without a written authorization : email: JM CHERRY
Last updated on: 24 Dec 2011