LS57 bare board (6X4/EL84/12AU7)
$21.00
LS57 bare board special version for Diyclub<(6X4,EL84,12AU7)
2.4mm thick gold plated fiber glass PCB with 2oz copper.
High voltage section using 6X4, EL84, 12AU7.
Two heater regulator 6.3V~ 12.6VDC adjustable using LM317.
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