Quote:
Originally Posted by old_tv_nut
12BY7A data sheet says transconductance is 11000 micromhos, or 11 ma per volt. Load is 5.6 kohms, so 5.6 volts per ma. Service data says input is 3v p-p.
3x11x5.6 = 185 v p-p. This could be different in this TV because minimum cathode resistance is 33 ohms (I may bother with actually calculating everything tomorrow). Anyway, 160 v p-p at max contrast does not seem unreasonable. 16 v p-p seems indeed to be a misprint.
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Will the b+ in this series string set even allow those kind of voltage swings? I looked at a similar US made set and they show 30vpp from the video out.
