Audioengine B1 Bluetooth Music Receiver connect Tube codec for iPhone playback

 

Technics SP10 mk2 ~ repair 33,45,78 rpm select button

                     replace J-K flip flop and other logic gate

Garrade 401 tonearm setup-1

 

Garrade 401 turntable tone arm setup

 

 

Condenser cartridge phono pre-amplifier

 

 

 

outside track

inner track 

 

outside track 

inner track

outside cartridge top view

inner cartridge top view 

Dr. Feickert尺規

Thorens TD124 motor pulley switch grid voltage 60hz to 50hz

 

before 60hz

 

                      tuning turntable speed by AC source

repair Garrade 401 turntable

 

             garrard 401 lever pivot washers broken can't switch speed

Grace G-565F Tone arm

 

Product name:  Grace G-565F *LONG*  static balance tonearm
Overall length: 365mm
Effective length: 285mm
Overhang: 15mm
Offset angle: 21゜
Tracking Error: < ± 1.5 °
Stylus pressure adjustment range: 0 - 3g
Cartridge/headshell weight: 0-20g (20-40g with additional weight)