Hi folks.
i havethis projectto build a AV monitor and are done with the schematic, it´s from an existing television, for video they use the PCL84, i just want to use the penthode, so my question is, is there another tube i can use instead of pcl84 with nearly the same data, i like the 12by7a but i´m not sure it can fit in the circuit.
sincerely
Alex
The PFL200 was introduced in 1963/4. The Baird 680 monochrome cable TV employed a PL802 for the video output. Possibly the only mono set to do so.
Till Eulenspiegel
thanx for answering, but im only interested in a video penthode like pl83, but i dont think it can be driven at 18 mA on the anode
PL83 was a reasonable video pentode in its day and has a 15V 300mA heater. It has an anode operating current of 36mA and I believe it was used by Philips in their projection TV sets. It is possible to operate at a lower anode current, probably by adjusting the screen voltage and changing grid bias to suit.
12HG7A was used by B&O in their 3400 chassis and 12GN7A in 3200 series.
Rich