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#490 Heathkit SB-230 GI-7B upgrade #2 Tube socket construction

Zero Labs ZERO LABS · OCT 02, 2025

This YouTube video has 1 000 views and was published Oct 2, 2025 on Zero Labs. That is 0.1x the channel's average views.

#490 Heathkit SB-230 GI-7B upgrade #2 Tube socket construction ▸ WATCH ON YOUTUBE
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