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Showing UBF80 and all of its variations. Other filters are hidden while viewing variations.

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17C8
Voltage - Pentode or Tetrode (with diode)Diode-Diode-PentodeDissimilarCommon cathodeSeries-parallel
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Base
Refer to variations
Socket code
B9A
Sections
3
Heater
17 V / 100 mA
Plate
S3: 250 V / 1.5 W
Screen
S3: 250 V / 0.3 W
Ik max
S1: 0.8 mA · S2: 0.8 mA · S3: 10 mA
V Inverse
S1: 350 V · S2: 350 V
rP
S3: 1,000,000 Ω
gm
S3: 2.2 mA/V
B9A - Small-button Noval 9-contact
Variations:UBF80
Double-diode remote-cutoff pentode designed for RF, IF, or AF amplification together with receiver detection functions.
Radio Detector Converter
Source PDFs (2)
- 1959 Rogers (opens in a new tab)
- 9999 Mixed 2000 (opens in a new tab)
UBF80
Voltage - Radio Detector Converter Diode-Diode-PentodeDissimilar
PDF Google eBay
Base
Refer to variations
Socket code
B9A
Sections
3
Heater
19 V / 100 mA
Plate
S1: 300 V · S3: 300 V / 2 W
Screen
S3: 250 V / 0.3 W
Ik max
S3: 10 mA
Rectifier
S1: 0.8 mA
V Inverse
S1: 350 V
rP
S3: 1,400,000 Ω
gm
S3: 2.2 mA/V
9 pins - B9A - Small-button Noval 9-contact
Variations:17C8
Series-heater double-diode variable-mu pentode for RF/IF amplification, detection, and automatic gain control. The pentode provides controllable gain while paired diodes handle detector and control rectification.
Detector Tube Radio Detector Converter Remote Cutoff Tube
Source PDFs (9)

Electrical Summary

General Summary

17C8

Voltage - Pentode or Tetrode (with diode)Diode-Diode-PentodeDissimilarCommon cathodeSeries-parallel

Heater	17 V / 100 mA
Plate	S3: 250 V / 1.5 W
Screen	S3: 250 V / 0.3 W
Ik max	S1: 0.8 mAS2: 0.8 mAS3: 10 mA
V Inverse	S1: 350 VS2: 350 V
rP	S3: 1,000,000 Ω
gm	S3: 2.2 mA/V

B9A - Small-button Noval 9-contact

Variations:UBF80

Double-diode remote-cutoff pentode designed for RF, IF, or AF amplification together with receiver detection functions.

Radio Detector Converter

UBF80

Voltage - Radio Detector Converter Diode-Diode-PentodeDissimilar

Heater	19 V / 100 mA
Plate	S1: 300 VS3: 300 V / 2 W
Screen	S3: 250 V / 0.3 W
Ik max	S3: 10 mA
Rectifier	S1: 0.8 mA
V Inverse	S1: 350 V
rP	S3: 1,400,000 Ω
gm	S3: 2.2 mA/V

9 pins - B9A - Small-button Noval 9-contact

Variations:17C8

Series-heater double-diode variable-mu pentode for RF/IF amplification, detection, and automatic gain control. The pentode provides controllable gain while paired diodes handle detector and control rectification.

Detector Tube Radio Detector Converter Remote Cutoff Tube

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