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E88C — Small Signal Triode, Noval | Tubeofile
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E88C
Small Signal Triode — Noval
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Philips
↗ Radiomuseum
Known Equivalents & Substitutes
No known equivalents. If you know of any, use the ⚑ Report Issue button above.
Similar Tubes (Not Drop-In Compatible)
E88CC
Double triode variant (two sections) — different tube, not a substitute
EC86
Similar UHF triode — different characteristics
Electrical Specifications
Absolute Maximum
Anode Voltage (max)
Anode Voltage (max, operating)
200
V
Anode Dissipation (max)
Anode Dissipation (max)
2.6
W
Cathode Current (max)
Cathode Current (max)
16.5
mA
Heater-to-Cathode Voltage (max)
Heater-Cathode Voltage (max, cathode positive)
125
V
Typical Operating
Anode Voltage (typical)
Anode Voltage
160
V
Grid 1 Bias Voltage
Grid Voltage
-1.25
V
Anode Current
Anode Current
12.5
mA
Anode Resistance
Internal Resistance
5,200
Ω
Transconductance
Mutual Conductance
other
Equivalent Noise Resistance
Equivalent Noise Resistance
240
Ω
Noise Figure (850 MHz)
Noise Figure (850 MHz)
9.6
dB
Anode Voltage (max, cold start)
Anode Voltage (max, cold start)
400
V
Heater
Heater Voltage
Heater Voltage
6.3
V
Heater Current
Heater Current
0.155
A
Notes
Single triode — not to be confused with the E88CC which is a double triode.
Gold-plated Noval base pins for low interface resistance.
Designed for grounded-grid amplifier operation at UHF frequencies (band IV/V, up to 850 MHz).
10,000-hour rated life under specified test conditions.
Heater voltage must be maintained at 6.3 V average; exceeding 6.0-6.6 V range shortens tube life.
Amplification factor mu = 70, internal resistance Ri = 5.2 kohm.
Pin Layout — Noval
1
2
3
4
5
6
7
8
9
1
Grid
2
Cathode
3
Grid
References
https://frank.pocnet.net/sheets/009/e/E88C.pdf
13.5
mA/V
Amplification Factor (μ)
Amplification Factor
70
—
4
Heater
5
Heater
6
Internal shield
7
Grid
8
Anode
9
Anode