Index
Amplifier Repairs
- Accuphase
- Aiwa
- Akai
- Alchemist
- Amcron
- Amstrad
- Arcam
- Armstrong
- Audio Expression
- Audio Innovations
- Audio Research
- Audio Vois
- Aura
- Avance
- Bang & Olufsen
- BK Electronics
- Bose
- Bryan
- Cambridge Audio
- Carver
- Counterpoint
- Creek
- Crimson
- Crown
- Cyrus
- Denon
- EAA
- Edison
- ETI
- Exposure
- Galactron
- GamuT
- Giovanni Stochino
- Goodmans
- Graaf
- Grundig
- Hafler
- Harman Kardon
- Hart
- Hitachi
- Ion Systems
- John Linsley Hood
- JVC
- Kenwood/Trio
- Krell
- Leak
- Linn
- Luxman
- Marantz
- Marshall
- McIntosh
- Metrosound
- Miscellaneous
- Mission
- Musical Fidelity
- NAD
- Nakamichi
- Nikko
- NVA
- Nytech
- Onix
- Opera
- Optonica
- Phase Linear
- Pioneer
- Powertran
- Primare
- Prinzsound
- Proton
- Quad
- Quantum Electronics
- Radford
- Realistic
- Revox
- Rogers
- Rotel
- Sansui
- Shearne Audio
- Sony
- Standard
- Sugden
- Technics
- Telefunken
- Tresham Audio
- Teac
- Texan
- Toshiba
- TUAC
- Wurlitzer
- Yamaha
Turntable Repairs
- Bush
- Dual
- JBE
- Lenco
- Linn
- Luxman
- Michell
- Pink Triangle
- Rega
- Roksan
- Systemdek
- Technics
- Telefunken
- Other
Other Repairs
- ADC
- Alpha by Highgate
- Beaulieu
- Cyrus
- DBX
- Farnell
- Marantz
- Naim
- Nakamichi
- Philips
- Quad
- Revox
- Sony
- Technics
Loudspeakers
- Acoustic Research
- Audio Pro
- Bang & Olufsen
- Bose
- Celestion
- Cerwin Vega
- Dynaco
- Gale
- JBL
- Meridian
- Mission
- NAD
- REL
- Yamaha
Tape
- Aiwa
- Akai
- Denon
- Hanimex
- JVC
- Kenwood
- Luxman
- Nakamichi
- Philco
- Philips
- Pioneer
- PYE
- Revox
- Sony
- Studer
- Tascam
- Teac
- Technics
- Yamaha
- Miscellaneous

Graaf Amplifier Repairs

Graaf GM20 Power Amplifier

Right side channel was distorted and at low level, resistors in the bias were high resistance due to the heat. Bias was set to 22 mA and the o\p DC was zeroed.