Transcription of RECONDITIONING AND MODERNIZING THE …
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RECONDITIONING AND MODERNIZING THE …
RDF PRODUCTSV ancouver, Washington, USA 98682 Tel: +1-360-253-2181 Fax: +1-360-635-4615E-Mail: Website: Radio Application Note RECONDITIONING AND MODERNIZINGTHE HEATHKIT HP-23 AC POWER SUPPLYRev A02/08-11/vr001_apl_01By Alex J. BurwasserOriginal Writing: July 2011iiTABLE OF CONTENTSSECTION I - INTRODUCTION AND OVERVIEW ..1 SECTION II - SUMMARY CIRCUIT DESCRIPTION ..2 SECTION III - AC LINE CORD REPLACEMENT AND COSMETICS .. LINE CORD REPLACEMENT ..5 SECTION IV - SILICON RECTIFIER DIODE REPLACEMENT .. REPLACEMENT ..6 DIODES IN SERIES .. RECTIFIER DIODE REVERSE VOLTAGE ISSUES .. SERIES RECTIFIER DIODE REVERSE VOLTAGE ..8 SECTION V - ELECTROLYTIC CAPACITOR REPLACEMENT ..9 CHARACTERISTICS OF ELECTROLYTIC CAPACITORS .. FOR C1-C4 (125 uF/500 V) .. C1/C2/C3/C4 .. FOR C5-C7 (40uF) ..13 SECTION VI - PHOTOS OF FULLY RECONDITIONED HP-23B AND VENDOR NOTES ..15 LIST OF ILLUSTRATIONSF igure 1 - Heathkit HP-23B AC Power Supply Schematic ..3 Figure 2 - HP-23B w/Top Cover Removed.
1 of 16 - RDF Products - Vancouver Washington USA SECTION I - INTRODUCTION AND OVERVIEW This paper is a vintage radio technical document that describes the reconditioning,
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