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Tubelab Discussion and support of Tubelab products, prototypes and experiments

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Old 29th July 2014, 04:42 PM   #1
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Join Date: May 2009
Default 300B B+

Hi! I built my Tubelab SE some time ago with 45 tubes but now I'd like to try 300B. However, I was surprised to see around 275V checking the Tubelab wbsite! Usually, it's more like 350-400V as B+
Did some fellows try that tube here?
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Old 30th July 2014, 01:54 AM   #2
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Join Date: May 2009
Default Got my answers

Searching for Tubelab with 300B, I found a very useful thread:

Tubelab SE checkout shows -300V Bias voltage?
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