# Amplex V1.0 - 5150 drive

# ------------------------- Valve Stage 1 -------------------------
# Caution! High output level!
v

# Rg, Ohms
68k

# Rp, Ohms
220k

# Rk, Ohms
1800

# Ck off-0, on-1
1

# Ck, F
1u

# ------------------------- RC High Pass Filter -------------------------
hprc
# R
1M
# C
22n

# ------------------------- Gain Type 2 -------------------------
g2

# C1 Pre-bright cap, F
2.2n

# R1 Pre-bright res, Ohms
470k

# C2 Bright cap, F
# 1 pF without bright
1n

# R2 Gain pot, Ohms
500k

# R3 Load, Ohms
10M

# ------------------------- Valve Stage 2 -------------------------
# Caution! High output level!
v

# Rg, Ohms
470k

# Rp, Ohms
100k

# Rk, Ohms
1800

# Ck off-0, on-1
1

# Ck, F
# 1u + 22u
23u

# ------------------------- RC High Pass Filter -------------------------
hprc
# R
# 470k + (1M || 220k)
650k
# C
22n

# ------------------------- Resistive Divider -------------------------
rd
# R1
470k
# R2
# 1M || 220k
180k

# ------------------------- Valve Stage 3 -------------------------
# Caution! High output level!
v

# Rg, Ohms
470k

# Rp, Ohms
100k

# Rk, Ohms
39k

# Ck off-0, on-1
0

# Ck, F
1u

# ------------------------- RC High Pass Filter -------------------------
hprc
# R
330k
# C
22n

# ------------------------- Low Pass Filter -------------------------
# Anode cap 1nF imitation
lp, 2500

# ------------------------- Divider -------------------------
# Stage load
d
1.33

# ------------------------- Valve Stage 4 -------------------------
# Caution! High output level!
v

# Rg, Ohms
220k

# Rp, Ohms
220k

# Rk, Ohms
1800

# Ck off-0, on-1
1

# Ck, F
1u

# ------------------------- RC High Pass Filter -------------------------
hprc
# R
# ?
100k
# C
22n

# ------------------------- Resistive Divider -------------------------
rd
# R1
1M
# R2
100k

# ------------------------- Valve Stage 5 -------------------------
# Caution! High output level!
v

# Rg, Ohms
1

# Rp, Ohms
220k

# Rk, Ohms
2200

# Ck off-0, on-1
0

# Ck, F
1u

# ------------------------- RC High Pass Filter -------------------------
hprc
# R
# ?
1M
# C
22n

# ------------------------- Resistive Divider -------------------------
rd
# R1
1M
# R2
1M

# ------------------------- Valve Stage 6 -------------------------
# Caution! High output level!
v

# Rg, Ohms
1

# Rp, Ohms
100k

# Rk, Ohms
2200

# Ck off-0, on-1
0

# Ck, F
1u

# ------------------------- Cathode Follower -------------------------
#cf

# ------------------------- High Pass Filter -------------------------
hp
31

# ------------------------- Divider -------------------------
d
140

# ------------------------- Tonestack -------------------------
ts

# C1
570p

# C2
22n

# C3
22n

# R1 Treble pot
250k

# R2 Bass pot
1M

# R3 Middle pot
50k

# R4
47k

# ------------------------- Power Amp -------------------------
pa

# Low End (resonance) freq, Hz
85

# Low End quality (Q)
2.5

# Presence freq, Hz
1500

# Feedback off-0, on-1
1

# BIAS voltage, V
55

# BIAS asymmetry, V
3

end