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g_p       plate conductance  ( = 1/r_p )
I_b        static plate current with no signal
I_bm      plate current at maximum power dissipation
I_bn       plate current at negative limit of bias
I_bp       plate current at positive limit of bias
I_c2       screen current
I_p        nominal plate current in pentode for e_b/e_c2 = 2
I_pp       nominal plate current at condition of positive limit bias
i_b         total instantaneous plate current
i_c2        total instantaneous screen grid current
i_g2        a-c  component  of  i_b
i_k          total alternating cathode current ( i_p + i_g2 )
i_p         a-c  component  of  i_b
K         gain
K_n        gain at most negative excursion of e_c
K_p        gain at most positive excursion of e_c
K_s         gain at static bias, E_c
P_c2       power dissipated in screen grid
P_p        power dissipated in plate
P_pm      maximum instantaneous plate dissipation
R_i         input resistance
R_k1       unbypassed portion of cathode bias resistance
R_k2       bypassed portion of cathode bias resistance
R_L        static load resistance
R_LD      dynamic load resistance
R_o        output resistance
r_p         plate resistance   (delta e_b / delta i_b   with E_c1 and E_c2 constant   ~ 1 / g_p )
R_s        series resistance for limiting screen voltage and current
X_c2       screen correction factor ( X_c2 ~ i_c2/I_p ~ g_m1/G_m1 )
X_p        plate correction factor ( X_p ~ i_b/I_p ~ g_m1/G_m1)
 
 
 
 
 
 
 

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Copyright 2008 for Phyllis K. Pullen, M.D.,
by Robert J. Legg