Triode / Pentode Loadline Simulator v.1.0

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Parameters at operaing point
U_a =	[V]	I_a =	[mA]	U_g =	[V]	R_i =		R_a =	[KΩ]
S =	[mA/V]	µ	[V/V]	P_a =
Harmonic distortion for U_inp =
h₂ =	[%]	h₃ =	[%]	h₄ =	[%]	h_tot =	[%]
Single Stage Grounded Cathode Amplifier Parameters

SE Output Stage Parameters

SE Output Transformer Parameters

No. of tubes (parallel connection)	I_amax	U_amax	U_gmin	U_gmax
	[mA]	[V]	[V]	[V]
Lower frequency limit F_L	Frequency distortion M_L	Upper frequency limit F_H	Frequency distortion M_H	Transformer efficiency
[Hz]	[dB]	[Hz]	[dB]
Loudspeaker impedance R_L				Screen voltage U_s (pentodes)
[Ω]				[V]

Symbol description

Symbol	Description
U_a	Anode voltage at operating point.
I_a	Anode current at operating point.
U_g	Bias voltage (grid voltage) at operating point.
R_i	Plate (internal) resistance at operating point.
R_a	Plate load resistance.
S	Transconductance calculated at operating point.
µ	Amplification factor of a tube at operating point.
P_a	Anode power dissipation at operating point.
I_s	Screen grid current (tetrodes and pentodes).
P_s	Screen grid power dissiparion at operating point.
R_k	Cathode resistor.
P_rk	Power dissipation of cathode resistor.
G_(rk)	Gain of a single stage amplifier with cathode resistor.
G_(rk=0)	Gain of a single stage amplifier without or bypassed cathode resistor.
M_L	Lower frequency distortion at frequency F_L
M_H	Higher frequency distortion at frequency F_H
P_out(t)	Power dissipated in the anode circuit of SE amplifier
P_out	Output power (SE) - P_out(t) corrected by transformer efficiency
η	Output transformer efficiency (usually in the range from 0.8 to 0.9)
L_1min	Minimum inductance of the primary winding of output transformer
L_1smax	Maximum leakage inductance of the primary winding of output transformer
N	Output transformer windings ratio (ω₂/ω₁)