Assembeld 6Z4+6N3-J HIFI StereoTube preamplifier /Cathode output tube preamp board Note: this is a assembeld and tested board, Default price inclue 2pcs 6N3 and 1pcs 6Z4 tubes PCB size: 140*80MM recommend voltage: Dual AC180V 37MA AC7.5V 2A AC6.3V 1A package:1pc Assembeld 6Z4+6N3 HIFI StereoTube preamplifier /Cathode output tube preamp board
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