Tag Archives: Hickok

JJ 12AX7 : Standard, V1, Balanced …

I bought 3 versions of the JJ 12AX7 : “standard”, marked V1, marked B (balanced) selected by Tube Town, german online shop I appreciate. I tested them on my tube tester (Hickok 600A) to compare transconductance of triode #1 and … Continue reading

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Hickok 600A tube tester

New in da house. Will help me a lot ! From great site BAMA (see also mirror site here), manual (retyped) and schematic : Hickok 600A manual retyped Hickok 600A schematic

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