- Jan 1, 1970
My first novice transmitter used a Horizontal Output tube. (ca. 11960's)Joerg said:For ham radio we've used PL509 because the TV-version was much cheaper
and they had that coveted formal 30W plate dissipation rating. It also
allowed us to feed five filaments in series. Since that was 40V each we
could connect one PL500 (used to regulate the grid 2) in series as well
and got an almost perfect match to 230V.