I acquired an 833A RF deck it is a 40/80M deck the only markings that may refer to the design is P.J. 2000 on the front panel. Info is a little scarce on this tube as far as rf amps go any ideas of what and when it may have appeared in a handbook or a QST? I would like to at least try it looks cool grounded grid thru a 55 ohm 100w resistor. Bob,kc0hfl