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Do It Yourself (DIY) paradise for tube and SET project builders.

RE: BDT Preamp Schematics

Aha, the "I" stands for "Insulated", the tab is insulated from the pins so you can screw it into a heatsink without needing mica insulators, nylon washers etc. Especially with the high voltages floating around these circuits I like to not have the HV where I could touch it!

John S.


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