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Introduction
Products History Mr Chui Yat Sang
Since there is no photo record on some products and before 1988 , the introduction below is just part of the products made by Mr Chui Yat Sang.
	Date of production : 1989
	Introduction : 6L6GC 13W Push-Pull (Triod) Mono Block Power Amplifier
	Recent Situation: Repairing
	Date of production : 1996
	Introduction : 300B Sing-Ended Mono Block Power Amplifier Tube complement : one 6SN7GTB input and driver , one 300B output , one 5R4 rectifier. Transformer complement : Hi-Pro Force power , Tango X-5S output , Shuguang 3H 700mA choke.
	Serving Mr Lee in Australid
	Date of production : 1994 ~ 1995
	Introduction : EL34 x4 120W Ultra- Linear Push-Pull Power Amplifier Tube complement : one EF86 input , one A2900 driver , two matched EL34 pairs (output) Transformer complement : Shuguang power , Shuguang 3H 700mA choke Tango X-3.5P output.
	one pair in Japan , another pair in Hong Kong (Mr Chan's home)
	Date of production : 1995
	Introduction : 300B Sing-Ended stereo Power Amplifier Tube complement : one 6SN7GTB input and driver , one 300B output , one 5R4 rectifier. Transformer complement : Hi-Pro Force power , Tango X-5S output , Shuguang 3H 700mA choke.
	Serving Mr Tam in Hong Kong
	Date of production : 1993
	Introduction : 300B Sing-Ended stereo Power Amplifier Tube complement : one 6SN7GTB input and driver , one 300B output , one 5U4G rectifier. Transformer complement : Hi-Pro Force power , Hi-Pro Force output , Hi-Pro Force input Hi-Pro Force 10H 250mA choke.
	Sold in1993
	Date of production : 1997
	Introduction : KT-90 x4 120W Ultra- Linear Push-Pull Power Amplifier Tube complement : one EF86 input , one E182CC driver , two matched KT90 pairs (output) one 6BM8 regulator. Transformer complement : Shuguang power , Shuguang 3H 700mA choke Audio Note output.
	For reference
	Date of production : 1989
	Introduction : 211 Sing-Ended stereo Power Amplifier Tube complement : one EF86 input , one 6FQ7 driver , one 211 output , one 5AR4 rectifier. Transformer complement : Hi-Pro Force power , Hi-Pro Force output , Hi-Pro Force 10H 350mA choke.
	Lay up (treasure) in our workshop
	Date of production: 1988
	Introduction : 6L6GC 20W Push-Pull stereo Power Amplifier Tube complement : one 12AU7 input , one 12AX7 driver , one matched 6L6GC pairs (output)
	Lay up (treasure) in our workshop
	Date of production : 1988
	Introduction : 6N1 line amplifier
	don't know
	Date of production : 1998
	Introduction : 6C33C-B OCL 120W external power supply Mono Block Power Amplifier (Atma-Sphere chassis) Tube complement : one 12AX7 input , one 5963 driver , two matched 6C33C-B pairs(output). Transformer complement : one 3000W toroidal power , one 300w toroidal power. two 0.1H 4A choke
	Serving Mr To in Hong Kong
	Date of production : 1995
	Introduction : 6C33C-B OCL 400W Mono Block Power Amplifier Tube complement : one 12AX7 input , one 5963 driver , Four matched 6C33C-B pairs(output). Transformer complement : one 3000W toroidal power , one 1000w toroidal power. four 0.1H 4A choke
	Serving Mr Chung in canada
	Date of production : 1994
	Introduction : 6550A 25W Push-Pull(Triod) stereo Power Amplifier Tube complement : one 6DJ8 input , one 6SN7GTB driver , one 6BQ5 regulator. one matched 6550A pairs (output) Transformer complement : Hi-Pro Force power , Hi-Pro Force output , Hi-Pro Force 5H 250mA choke.
	don't know
	Date of production : 1995
	Introduction: 2A3 x4 Push-Pull Mono Block 35W Power Amplifier Tube complement : one 6SJ7 input , one 6K6 driver , two matched 2A3 pairs (output) Transformer complement : Hi-Pro Force output , Hi-Pro Force input Hi-Pro Force 10H 350mA choke.
	Serving Mr Young in Hong Kong
	Date of production : 1993 ~ 1994
	Introduction: 6BQ5 x6 Push-Pull stereo 35W Amplifier Tube complement : one 12AT7 input, one 12AT7 driver , three matched 6BQ5 pairs (output) Transformer complement : Hi-Pro Force power , Hi-Pro Force output , Hi-Pro Force 5H 400mA choke.
	Has produced a lot
	Date of production : 1993 ~ 1995
	Introduction: 2A3 Push-Pull stereo 15W Power Amplifie Tube complement : one 6SJ7 input , one 6K6 driver , one matched 2A3 pairs (output) Transformer complement : Hi-Pro Force output , Hi-Pro Force input Hi-Pro Force 15H 250mA choke.
	has produced about 20
	Date of production : 1989 ~ 1995年
	Introduction : 6V6 10W Push-Pull stereo Power Amplifier Tube complement : one 6DJ8 input , one 6SN7GTB driver , one 6BQ5 regulator. one matched 6V6 pairs (output) Transformer complement : Hi-Pro Force power , Hi-Pro Force output , Hi-Pro Force 5H 250mA choke.
	has produced about 20
	Date of production : 1994 ~ 1996
	Introduction : 211 25W Sing-Ended stereo Power Amplifier Tube complement : one EF86 input , one 6FQ7 driver , one 211 output , one 5AR4 rectifier. Transformer complement : Hi-Pro Force power , Hi-Pro Force output , Hi-Pro Force 15H 350mA choke.
	Lay up (treasure) in our workshop
	Date of production : 1994 ~ 1996
	Introduction : 811A 16W Sing-Ended stereo Power Amplifier Tube complement : one 6SL7 input , one 6L6G driver , one 811A output . Transformer complement : Hi-Pro Force power , Hi-Pro Force output , Hi-Pro Force input Hi-Pro Force 15H 350mA choke.
	has produced a lot , two of them lay up in our workshop
	Date of production : 1995
	ntroduction : 5881 50W Push-Pull stereo Power Amplifier Tube complement : one 6SL7 input and driver , one 5AR4 rectifier. one matched 5331 pairs (output) Transformer complement : Hi-Pro Force power , Hi-Pro Force output , Hi-Pro Force 5H 500mA choke.
	Serving Mr Yip in Hong Kong
	Date of production : 1990
	Introduction : EL34 x6 120W Ultra- Linear Push-Pull external power supply Power Amplifier Tube complement : one 6N2 input , one 6F2 driver , three matched EL34 pairs (output) Transformer complement : Hi-Pro Force power , Hi-Pro Force output , Two Hi-Pro Force 5H 500mA choke.
	has produced a lot , one of them lay up in our workshop
	Date of production : 1993 ~ 1996
	Introduction : 300B Sing-Ended Mono Block Power Amplifier Tube complement : one CV181 input , one 6L6G driver , one 300B output one 12AX7 regulator , one 6080 regulator. Transformer complement : Hi-Pro Force power , Hi-Pro Force output , Two Hi-Pro Force 10H 250mA choke.
	has produced about 20
	Date of production : 1990
	Introduction : EL34 x4 90W Ultra- Linear Push-Pull Power Amplifier Tube complement : one EF86 input , one 12AU7 driver , two matched EL34 pairs (output)
	Lay up (treasure) in our workshop
	Date of production : 1996
	Introduction: 300B Push-Pull Mono Block 45W Power Amplifier Tube complement : one 12AX7 input , one 5963 driver , one matched 300B pairs (output) one 12AX7 regulator , one 6080 regulator. Transformer complement : Shuguang power , Shuguang choke Tango X-3.5P output. Introduction: YS-Audio YSP-200 external power supply Preamplifier Tube complement : two 12AX7 and two 6V6 Line stage . one 6SJ7 regulator , two 5881 regulator , one EF80 regulator , one 6BQ5 regulator, for power supply.
	Serving in Malaysia
	Date of production : 9 / 2000
	Introduction: Tubes Line preamplifier with Input and Output transformer . Tube complement : Two Western Electric 396A P-P Line stage , One 83 rectifier Transformer complement : UTC A26 line output , UTC A11 line input . specially match SE power amplifier.

	Date of production : 10 / 2000
	Introduction: Tubes balance Line preamplifier with Input and Output transformer . Tube complement : Two Western Electric 396A balance Line stage , Two Sylvania 6BH8 regulator for HV B+ power supply every channel Transformer complement : Tango NP-8 line output , Sowter 9062E line input . AA Grade Hi-End full balance line preamplifer .
	Serving Mr Chan in Hong Kong
	Date of production : 11 / 2000
	Introduction: Tubes Line preamplifier with Input and Output transformer . Tube complement : Two Western Electric 396A P-P Line stage , One 83 rectifier Transformer complement : UTC A26 line output , UTC A20 line input . specially match SE power amplifier.
	Serving Mr Buhl in Germany
	Date of production : 12 / 2000
	Introduction: Tubes full balance external power supply Line preamplifier with Input and Output transformer . Tube complement : Two Western Electric 396A balance Line stage , Two Sylvania 6BH8 regulator for HV B+ power supply every channel Transformer complement : Tango NP-8 line output , Sowter 9062E line input . AA Grade Hi-End full balance line preamplifer .
	Serving Mr Chan in Hong Kong
	Date of production : 1 / 2001
	Introduction: Tubes Line preamplifier with Input and Output transformer . Tube complement : Two Western Electric 396A P-P Line stage , Two 6U8A regulator for HV B+ power supply every channel Transformer complement : UTC A26 line output , UTC A11 line input . Specially match SE power amplifier.

	Date of production : 2 / 2001
	Introduction: Ultimate Grade , full balance KT88 power amplifier. Output power : RMS 100W / 30Hz sine wave, Max 175W / 30Hz . Tube complement : One Sovter 6AS7 for 600V/350mA B+ regulator power supply One ECG 6SJ7 for 600V/350mA B+ regulator power supply , One Sovter 6BM8 for 300V/40mA B+ regulator power supply , Two Telefunken 12AT7 balance input One Mullard ECC82 driver Two G.E.C. KT88 AB1 P-P power output Transformer complement : Tango X-5P output. 3 pcs Tango choke , Hi-Pro Force power .
	Serving Mr Chan in Hong Kong
	Date of production : 9/2001
	Introduction: Ultimate Grade , 300B or VV52B SE power amplifier. Output Power : Use VV52B RMS 17W / 30Hz sine wave , Max 34W / 30Hz . Use 300B RMS 10W / 30Hz sine wave , Max 32W / 30Hz. Tube complement : One Western Electric 420A for 500V / 150mA B+ regulator power supply One Western Electric 396A for 500V / 150mA B+ regulator power supply. One Western Electric 417A input One Western Electric 350B driver One Western Electric 300B power or VV52B power. Transformer complement : Tango XE-60-3.5S , Lundahl interstage for 350B driver power tube , Hi-Pro Force power , GE choke. More.......
	Serving Mr To in Hong Kong
	Date of production : 10/2001
	Introduction: Ultimate Grade , AD1 P-P power amplifier. Output Power : RMS 10W / 30Hz sine wave , Max 15W / 30Hz. Tube complement: One Telefunken RGN4004 rectifier One Telefunken AC2 input Two Telefunken RE074 driver Two Telefunken AD1 power . Transformer complement : Tango XE-60-8P , UTC A20 input , Western Electric choke , Fluke choke , Paeco power . More........
	Serving Mr To in Hong Kong
	Date of production : 11/2001
	Introduction: Reference Grade , EL156 x4 P-P power amplifier. Output Power : RMS 112.5W / 30Hz sine wave , Max 220W / 30Hz. Tube complement: One Western Electric 417A input One Telefunken ECC82 driver Four Telefunken EL156 power Transformer complement : LUNDAHLL Sweden 250W Output , LUNDAHLL Sweden Input , LUNDAHLL Sweden Power x 2, Shuguang choke.
	Serving Mr Wong in Hong Kong
	Date of production : 4/2002
	Introduction: Reference Grade Tubes full balance external power supply Line preamplifier with Input and Output transformer . The preamplifier working by 396A P-P mode with output transformer. Tube complement : Two Western Electric 396A balance Line stage , Two Sylvania 6BH8 regulator for HV B+ power supply every channel Transformer complement : Western Electric line output , Sowter line input .
	Serving for Mr Kim in South Korea
	Date of production : 6/2002
	Introduction: Ultimate Grade Tube Line Preamplifier. with Balance or RCA Input and Balance or RCA Output , Remote. The preamplifier working by 396A SE mode with output transformer. with twin Crystal SC3310 digital volume control. Twin solid state regulator for HV B+ power supply with tube current control every channel. Tube complement : Western Electric 417A input. Western Electric 396A output. Western Electric 412A current control. Transformer complement : FLUKE power , HP choke , Tango Line output , LUNDAHLL Sweden input.
	Serving for Mr Chan in Hong Kong.

Introduction

Products History Mr Chui Yat Sang

Products History
Mr Chui Yat Sang