Category: TUBE PRE-AMP
TUBE PRE-AMP
Showing 33–41 of 41 results
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LS-7B bare board
$23.00Add to cartLS-7B bare board 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. board size:L 280mm X W 200mm
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LS-7B up-grade version assembled & tested
$211.00Add to cartLS-7B up-grade version 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,Analog section up-grade toGerman made GAD coupling capacitor,RA …
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LS-8 Shigeru Wada up-grade version assembled
$162.00Add to cartLS-8 Shigeru Wada up-grade version assembled & tested modify the output stage of M7 line stage from cathode follower to SRPP. up-grade to German made GAD MKP coupling Capacitor and RA metal film resistor sound very musical board size: 200mm X 150mm matching supply LS-DY, LS-65, LS-70, LS-9D (tubes, case and power transformer not included)
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LS-9 upgrade version assembled & Test
$195.00Add to cartLS-9 upgrade version assembled & tested (for customer made only) Circuit modified from Jadis, using 6 pieces of 12AT7 double side gold plated pcb board, GAD MKP coupling capacitor, RA metal film. board size: L 230mm X 155mm (tubes, case and power trasformer not included)
