The plate current, plate voltage and grid voltage of a 6F6 triode tube are related as
Ip = 41(Vp + 7 Vg) 1.41, Where Vp and Vg are in volts and ip in microamperes. The tube is operated at Vp = 250 V, Vg = –20 V. Calculate
(a) the tube current,
(b) the plate resistance,
(c) the mutual conductance and
(d) the amplification factor.
a) Given, VP = 250 V, Vg = –20 V
Also
b) Differentiating the given equation with respect to ip keeping Vg constant.
The dynamic resistance of triode is defined as,
c) Differentiating the given equation with respect to Vg keeping Vp constant
d)
where rp is the plate resistance and gm is the trans-conductance
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