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← 2A3
2A3 — Candidate to replace following?
Power Triode — DHT — UX4
⚠ Safety
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Top 10 Picks
45
drop-in
2.5V
✓ Safe
Your Tube
Base:
UX4
Heater:
2.5V / 2.5A
Type:
power triode
DHT
i
mu:
4.2
gm:
5.25
mA/V
ra:
800
Ω
Ia:
60
mA
Pa:
15
W
Cgp:
16.5
pF
Pinout (UX4)
h
a
g1
h
Candidates to replace (10)
Heater:
2V
0
2.5V
1
●
5V
0
6.5V
1
7V
1
7.5V
2
show all (6)
Fit:
Drop-in
1
Adapter
0
Status:
✓ Safe
5
⚠ Close, low Pa
1
⚠ Low Pa
4
1 shown (target 2.5V only)
▣ Compact
⚙ Thresholds filter
2.5V Heater
(1 candidates)
Tube
Status ↑
Pa
Ah
Fit
45
✓ Safe
10
W
-33%
1.5
drop-in
Generated 2026-04-09
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0
selected
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