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
A GRADO RA1 HEADPHONE AMPLIFIER CLONE

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.
100/120 HZ FILTER AMPLIFIER BOX.
SWITCHABLE TURNTABLE STROBE GENERATOR.

A BUCK BOX TO LOWER 240V TO 220V FOR CHINESE GEAR.
AN EXTERNAL TONE CONTROL BOX.
QUICK 40dB PAD FOR AUDIO TESTING RIAA AMPLIFIERS.
AIRCRAFT HANDLERS HEADSET TEST BOX AND TRAINING AID.
A SIMPLE EMERGENCY LIGHT.
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FULL INDEX TO THE RADIO & TV SERVICING BOOKS

ABOUT ME!