[turretslug]

Slight tangential query here- I've long wondered about the g2 voltage limitations in RF PA specs- e.g. the 807 being quoted somewhat lower than the supposedly originative 6L6. I wondered if this was more to do with limiting screen dissipation or, more exotically, to hinder the tendency to B-K parasitics, when the anode has a tuned, resonant load subject to large-amplitude negative excursion than any straightforward clearance limitation. If so, that would suggest that higher screen voltage would be acceptable when an RF PA-marketed valve was used as an AF PA- say a 300V spec. limitation becoming more like 400V? Subject to the usual considerations of g2 dissipation, use of stopper resistors with high-slope valves and high g2 voltage and so on.