6J1 HiFi stereo tube electronic valve Preamp Preamplifier amplifier board

1: Using patch + plug-in production process , Performance and stability

2: The tubes are supplied separately , Avoid interference .

3: Note: The board must use two independent winding 12v transformers

4:Transformer needs to be purchased separately, this kit does not contain transformer

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Input voltage: 2 independent winding AC 12v (each winding power 3w or more)

Board magnification: about 1 times

Board size: 100mm * 50mm