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← PX4
Rolling Candidates to replace PX4
Power Triode — DHT — B4
⚠ Safety
Drop-In Replacements
✓
CV1168
✓
4XP
✓
AC044
✓
LP4
✓
NR44
✓
PP3/250
✓
P12/250
✓
P460
✓
S30C
✓
S30G
✓
VT131
Top 10 Picks
PX25
drop-in
4V
✓ Safe
Rolling Candidates (19)
i
Heater:
2V
0
2.5V
1
4V
1
●
5V
3
6.3V
1
7V
1
7.5V
3
10V
4
show all (8)
Fit:
Drop-in
1
Adapter
0
Status:
✓ Close
2
✓ Safe
12
⚠ Low Pa
5
1 shown (target 4V only)
▣ Compact
⚙ Thresholds filter
4V Heater
(1 candidates)
Tube
Status ↑
Pa
Ah
Fit
PX25
✓ Safe
25
W
2
drop-in
Generated 2026-04-09
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