LS-19 bare board
circuit came from MFA. using three 6922, addiing constant current source at the input stage.
board size: L 220mm X W 155mm
LS-19 bare board
circuit came from MFA. using three 6922, addiing constant current source at the input stage.
board size: L 220mm X W 155mm
LS-59 (Modify SL-1) assembled & tested Special version for DIYCLUB(The layout are completely re-arrange for better performance) circuit modify from convergent SL-1,have two voltage amplify stage, 12AU7 used in first stage,second stage is 12AX7 SRPP, output stage use a 6DJ8 as a cathode follower,voltage swing about 50V.With more dynamic ,mid and high end is lush, …
LS-37 assembled & tested MM/MC RIAA Phono Amp, using 4 pieces of 12AX7,input impedance of mm head is adjusttable, m/c input voltage section connect as ground grid, grounding is “STAR” ground. PP coupling capacitor,metal film and carbon film resistor (tubes, case and power transformer not included) You can change the input impedance from 150ohm to …
GA-31A MM assembled & tested MM RIAA Phono Amp, Voltage amp stage using 4 pieces of 6922/6DJ8, input stage is using LM394. The sound of GA 31 Phono kit is relaxed atmosphere, rich layers; it can be very good with your MM phono. board size: 230mmx155mm (tubes, case and power transformer not included)
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