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← 300B
300B — Candidate to replace following?
Power Triode — DHT — UX4
⚠ Safety
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Equivalents
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Equivalents — Same Tube, Different Names
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WE300B
✓
4300A
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AV300B
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CV2609
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Top 10 Picks
71A
drop-in
5V
⚠ Low Pa
Your Tube
Base:
UX4
Heater:
5V / 1.2A
Type:
power triode
DHT
i
mu:
3.9
gm:
5.3
mA/V
ra:
740
Ω
Ia:
60
mA
Pa:
36
W
Cgp:
15
pF
Pinout (UX4)
h
a
g1
h
Candidates to replace (11)
Heater:
2V
0
2.5V
2
5V
0
●
6.5V
1
7V
1
7.5V
4
10V
0
show all (7)
Fit:
Drop-in
0
Adapter
0
Status:
✓ Close
1
✓ Safe
7
⚠ Low Pa
3
0 shown (target 5V only)
▣ Compact
⚙ Thresholds filter
No candidates match the selected filters.
Show candidates on other heater voltages (6 additional)
Generated 2026-04-09
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