LJ "Red Maroon" line preamplifier. Using:
OTK Russian 6h1n (6n1p) tubes and 5687 in signal section,
OTK Russian 5u4c/5c4s (5Z4) for rectifier. Photo file: July 25, 2007.
OTK Russian 6h1n (6n1p) tubes and 5687 in signal section,
OTK Russian 5u4c/5c4s (5Z4) for rectifier. Photo file: July 25, 2007.