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← 7B4
Rolling Candidates to replace 7B4
Small Signal Triode — Loctal
⚠ Safety
Drop-In Replacements
✓
V879
Top 10 Picks
6SF5
adapter
6.3V
✓ Close
ECC35
adapter
6.3V
⚠ Low Pa
76
adapter
6.3V
⚠ Low Pa
6P5GT
adapter
6.3V
⚠ Low Pa
420A
adapter
6.3V
⚠ Low Pa
6N2P
adapter
6.3V
⚠ Low Pa
6SL7
adapter
6.3V
⚠ Low Pa
6SU7
adapter
6.3V
⚠ Low Pa
7F7
adapter
6.3V
⚠ Low Pa
ECC86
adapter
6.3V
⚠ Low Pa
Rolling Candidates (21)
i
Heater:
2.5V
0
6.3V
1
●
12.6V
1
show all (3)
Fit:
Drop-in
0
Adapter
1
Status:
✓ Close
2
⚠ Low Pa
19
1 shown (target 6.3V only)
▣ Compact
⚙ Thresholds filter
6.3V Heater
(1 candidates)
Tube
Status ↑
Pa
Ah
Fit
6SF5
✓ Close
—
0.3
adapter
Generated 2026-04-09
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