CRT Question - Old Calculator

Yes, and people ask for DB9 connectors and IN4148 diodes.... Not all output pentodes ahve the suppressor grid borught out to a spearate pin. And while I've not checked al lthe data books, it wouldn't suprise me if at least one beam tetorde had the beam forming plates brought out separately. I once tired ot use an EF86 as an AND gate, with the inputs on the control grid and suppressor grid. It worked, but it needed a lot of -ve bias o nthe suppressor grid to cut it off. I also remeembr a Mazda valve, 6F33, which was designed for supressor grid control. I think it was designed for use i nthe flywheel sync circuit of a TV set, but I came across it ian an FSK modulator for RTTY which had 2 oscillators (mark and space) and a pair of 6F33s to get them to the output I met a chap who made a transmitter where all the valves were 807s. Even the rectivfiers (all grids strapped ot the andoe, an 807 as a diode...). I've also noticed that the anode slope of a 6080 (big double triode used as the series pass elemenet in Tekky 'scope PSUs, amongst other things) is about 120 Ohms. I have wondered about paralleling up 15 or 16 sections and directly drivign an 8 ohm speaker.... Or maybe a totem pole output stage -- Philips tried them, with a UL84 on top of an EL84 driving some high-impedance speaker (800 ohmes?) .It worked, but the very fine wire of the high impedance speech coil was prone to going O/C -tony