Hi - This is the website of Les Carpenter G4CNH.

On this site are links to various things I have Repaired, Modified, Designed or Researched.

A LOOK AT THE YAQIN 10L/10T & 13S AMPLIFIERS
PUTTING LIFE INTO THE YAQIN MS12-B PHONO/PREAMPLIFIER
PUTTING LIFE INTO THE YAQIN MS22/23B PHONO AMPLIFIER
BUILDING A REV.2 SWAP BOARD FOR THE YAQIN MS22/23
FITTING A REV.2 SWAP BOARD TO THE YAQIN MS22/23
A LOOK AT THE YAQIN MS33 MC/MM PHONO AMPLIFIER
A LOOK AT THE YAQIN 100B STEREO VALVE AMPLIFIER

LET'S BUILD A LES-BOX RIAA AMPLIFIER FROM SCRATCH
SERVICING THE RM KL400 LINEAR AMPLIFIER
A LOOK AT THE TEAC A3440 REEL TO REEL TAPE RECORDER
A QUAD 405 AMPLIFIER REPAIR
A FAT MAN iTUBE 182 AMPLIFIER REPAIR
A LOOK AT THE XIANG SHENG 728A PRE-AMPLIFIER 
THE SUSSEX VALVE/VACUUM TUBE TESTER
AEA MAGNETIC LOOP REPLACEMENT CONTROLLER

DECADE RESISTANCE BOX - 1 Ohm to 1M Ohm
8 OHM 60 WATT NON-INDUCTIVE LOADS FOR AMPLIFIER TESTING.
SPEAKER SWITCH TO TWO SEPARATE AMPLIFIERS
SPECIAL SWITCH FROM TWO SOURCES TO TWO OUTPUTS.
4 TUBE BIAS MONITOR BOX FOR AMPLIFIER SERVICING.
SWITCHABLE TURNTABLE STROBE GENERATOR.
AN ATTEMPT TO BUILD A MC CARTRIDGE PRE-AMPLIFIER.

A BUCK BOX TO LOWER 240V TO 220V FOR CHINESE GEAR.
AN EXTERNAL TONE CONTROL BOX.
QUICK 40dB PAD FOR AUDIO TESTING RIAA AMPLIFIERS.

FULL INDEX TO THE RADIO & TV SERVICING BOOKS

ABOUT ME!