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The 6L6GB is similar to the more common 6L6GC, but has lower ratings (maximum plate and screen voltages 360V and 270V vs. 500V and 450V, and maximum plate and screen dissipations 19W and 2.5W vs. 30W and 5W). All of the curves for the 6L6GB are applicable to the 6L6GC.
See also 6L6GC
From the GE Receiving Tubes manual
2. Characteristics and typical operation
3. Plate characteristics for triode and pentode
6. Screen characteristics, operation characteristics
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