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3C24
Power Triode — DHT — UX4 — Heintz & Kaufman
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Data: High
High quality — base, heater, all universal parameters present, and ≥50% of desirable parameters filled in. Safe to use for design decisions.
↗ TDSL
↗ Radiomuseum
Known Equivalents & Substitutes
VT-204
HK24G
24G
CV2736
CV789
Similar Tubes (Not Drop-In Compatible)
3C28
Related Gammatron transmitting triode listed alongside 3C24 on TDSL — different power rating
Electrical Specifications
Absolute Maximum
Anode Voltage (max)
Max. Plate Voltage
1,500
V
Anode Dissipation (max)
Max. Plate Dissipation
25
W
Typical Operating
Anode Voltage (typical)
Plate Voltage (typical)
1,000
V
Grid 1 Bias Voltage
Grid Voltage
-60
V
Notes
Grid connection is via a side contact on the envelope, not through the base pins. Anode connects through a top cap.
Originally designated 24-G Gammatron by Heintz & Kaufman; RETMA assigned the 3C24 type number.
VT-204 is the US military designation for this tube.
Thoriated tungsten filament requires careful reactivation procedure if overloaded.
Suitable for RF oscillator, amplifier, and modulator service in VHF equipment.
Pin Layout — UX4
1
2
3
4
5
1
Filament
2
No Connection
3
No Connection
4
Filament
SC
References
https://frank.yueksel.org/sheets/030/3/3C24.pdf
Anode Current
Plate Current
50
mA
Anode Resistance
Plate Resistance
6,700
Ω
Transconductance
Transconductance
3
mA/V
Amplification Factor (μ)
Amplification Factor
20
—
Capacitances
Grid-to-Plate Capacitance
Grid-Plate Capacitance
2.2
pF
Input Capacitance
Input Capacitance
2.5
pF
Output Capacitance
Output Capacitance
1.2
pF
Noise / RF
Max Operating Frequency
Max. Frequency (full ratings)
200
MHz
Heater
Heater Voltage
Filament Voltage
6.3
V
Heater Current
Filament Current
3
A
Grid (Side Contact)
TC
Top Cap —
Anode (Top Cap)