4P1S direct heat pipe two-channel preamplifier board JCDQ-2F, 6F3 vacuum tube high voltage regulator, LM317 voltage regulator

4P1S direct heat pipe two-channel preamplifier board JCDQ-2F, 6F3 vacuum tube high voltage regulator, LM317 voltage regulator
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sku: 1005006340759832
$34.52
Shipping from: China
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