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B&K 470 Rejuvenator test socket question.
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03-25-2018, 03:09 PM
jr_tech
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Join Date: Sep 2009
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IIRC, both the tubes mentioned were designed with low power heaters and the cathode is directly heated... the heater operates at around 0.6 to 0.65 volts... will the 470 even go that low?
jr
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