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← AL4
Rolling Candidates to replace AL4
Power Pentode — P8A
⚠ Safety
Top 10 Picks
AL3
adapter
4V
✓ Close
AL5/375
adapter
4V
✓ Safe
AL5
adapter
4V
✓ Safe
Rolling Candidates (128)
i
Heater:
2.1V
0
4V
3
●
6.3V
77
8.4V
1
10V
1
12.6V
4
15V
1
16.5V
1
18.9V
1
19V
2
21V
2
22V
0
25V
4
26.5V
1
30V
1
33V
1
35V
0
45V
1
show all (18)
Fit:
Drop-in
0
Adapter
3
Status:
✓ Close
14
✓ Safe
87
⚠ Low Pa
27
3 shown (target 4V only)
▣ Compact
⚙ Thresholds filter
4V Heater
(3 candidates)
Tube
Status ↑
Pa
Ah
Fit
AL3
✓ Close
9
W
1.85
adapter
AL5/375
✓ Safe
18
W
2
adapter
AL5
✓ Safe
18
W
2
adapter
Generated 2026-04-09
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