Williamson-202_20-pwr-sch 维修电路原理图.pdf

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1、R14470k0.5WR19470k0.5WR260R233k1WR347k2WC10AOTCin 8.2nFpolystyreneR11M0.5WR622k1WR722k1WC*R8470k0.5WC247-100F500VR9470k0.5WV1V2V3V4V5V7V6R42200.5WR522k1WC147F500VR1147k2WR10180 0.5WR1347k2WC3220nF630VC6220nF630VC4220nF630VC7220nF630VR18100 1WR16100 1WR21100 2WR22150 3WR24100 1WR15 1k 0.5WR20 1k 0.5W

2、R17 1002WR15 1.2kZout4.7k 0.5WOutputC547-100F500VC*C*a aa aa aa aa aa aaaC868-100F500VC*RCH1 1k 1WCH130H 20mA( Sowter 8609 )CH210H 150mA( Sowter CA15 )Chum220nF 630V MKT for 50Hz mains180nF 630V MKT for 60Hz mainsC98-22F630V MKT5V 3A6.3V 4A0V0V0V425V 150mA440 - 460V420 - 440VItems marked in orange a

3、re changesfrom the original schematic C*= 1.0F 4.7F Polypropylene(MKP) bypass capacitor which mayimprove high frequency definition!This link may bereplaced with4.7 1W resistorto prevent humloopsF1 315mA ASa.c.mainsinLNEThe Williamson Amplifier “new version”The Williamson Amplifier “new version”from

4、Wireless World August 1949 p. 282from Wireless World August 1949 p. 282Redrawn 1996 by Keith SnookRedrawn 1996 by Keith Snookd.c. daylight ltdd.c. daylight ltd. .( Sowter 8950set to 15 )2V85-105V310-320V310-320V200-210V87-107VR23100 1W170-180V170-180V35-40VECC81ECC81V3+V4ECC81KT66KT662VR4 and R25 1%all other resistors 5%T2T1425V 150mANote: This schematiccontains changes from theoriginal, refer to: www.dc-daylight.ltd.uk for originalvalues.RadioFans.CN 收音机爱 好者资料库