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Re: 400k resistor on 300B grid???

Thorsten,
It is probably true for WE300B tubes. Most current production 300B have the limit of 50k with fixed bias and 100k with autobias (look at AVVT, EML etc datasheets). Everything is fine if you have the the sensitive speakers and don't drive 300B amplifier to hard.

Can you tell me why high Rp pentodes can't work with grid choke?
Maciek


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