Category: TUBE PRE-AMP
Showing 17–32 of 41 results
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LS-31 assembled & tested Circuit using famous 5842, 6E2 tuning indicator, very simple design. PP coupling capacitor,metal film and carbon film resistor, board size: L 220mm X 155mm (tubes, case and power transformer not included)
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LS-32 assembled & tested 6H30 line amp, with 6E2 indicator tube, circuit very simply and sound excellent Available Options: power transform: Matching R-type transformer (+US$36)
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LS-35 assembled & tested Dual mono design, each set have two pieces of PCB, seperate dual power supply using two pieces of LS-DY, on the preamp section total six 12AX7 is used. PP coupling capacitor,metal film and carbon film resistor board size: L 220mm X W 155mm (tubes, case and power transformer not included)
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LS-35 bare board dual mono design, each set have two pieces of PCB, seperate dual power supply using two pieces of LS-DY, on the preamp section total six 12AX7 is used board size: L 220mm X W 155mm
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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 …
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LS-58 6SN7 bare board Special Version for DIYCLYB 6SN7 Classic line amp, first stage is common cathode, output stage is a cathode follower (tubes, case and power transformer not included) matching supply LS-DY, LS-65, LS-70, LS-9D board size: L 230mm X W 155mm. 2.4mm thick fibre glass board with thicker copper trace.
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LS-58 6SN7 pre-amp assembled &tested LS-58 Special Version for DIYCLYB 6SN7 Classic line amp, first stage is common cathode, output stage is a cathode follower board size: L 230mm X W 155mm. 2.4mm thick fibre glass board with thicker copper trace. (tubes not included)
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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, …
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LS-59 (Modify SL-1) bare board 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, liquid …
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LS-60 Balance pre-amp assembled & tested Applied active load technology to simple circuit design, electrical characteristics and sound quality have reached the top HI END equipment standard. Circuit use a dual-triode 12AU7, imposed constant current source active load FET technology, makes the gain, bandwidth, control to ideal, and then to impose a cathode follower output …
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LS-68 assembled and tested board modify from CJ : using four 12AX7 board size: L 230mm X W 155mm. 2.4mm thick fibre glass board with thicker copper trace. (tubes, case and power transformer not included)
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LS-68 bared board modify from CJ : using four 12AX7 board size: L 230mm X W 155mm. 2.4mm thick fibre glass board with thicker copper trace. (tubes, case and power transformer not included)
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LS-69 assembled and tested board Hybrid tube balance pre-amp using FET input, tube cathode follower output board size: L230mm W 150mm board thick 2.5mm (tubes, case and power transformer not included)
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LS-69 bare board Hybrid tube balance pre-amp using FET input, tube cathode follower output board size: L230mm W 150mm board thick 2.5mm
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LS-7B assembled & tested Modify from classic Marantz 7 preamp, circuit using two 12AX7 and one 12AU7, to lower the output impedance, a cathode follower is used. A tube high voltage regulator and rectify using 5687 a time delay circuit, a heater voltage regulator using LM317,SCR PP coupling capacitor,metal film and carbon film resistor, (tubes …
