Tube cross-reference
UBF80 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the UBF80 voltage radio detector converter. Compare core specifications and verify every restriction before using a replacement.
Exact variations of UBF80
These designations belong to the same electrical variation group. Their names may differ because of international standards, manufacturing tolerances, or materials, but they are recorded as electrically equivalent—not merely substitutes.
17C8 Voltage Pentode or Tetrode (with diode)
- Base
- Not recorded
- Socket
- B9A
- Base pins
- Not recorded
- Sections
- 3
- Heater voltage
- 17 V
- Heater current
- 0.1 A
Replacement tubes for UBF80
The following tubes are recorded as possible replacements for UBF80. This direction does not establish that UBF80 can replace them.
Voltage Pentode or Tetrode (with diode)
The database records 17C8 as a possible replacement forUBF80.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Pentode or Tetrode (with diode) |
| Construction | Diode-Diode-Pentode | Diode-Diode-Pentode |
| Base | Not recorded | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | Not recorded |
| Sections | 3 | 3 |
| Heater voltage | 19 V | 17 V |
| Heater current | 0.1 A | 0.1 A |
Where UBF80 can be used as the replacement
In these recorded relationships, UBF80 is the replacement tube. The listed original tubes are not automatically suitable as replacements for UBF80.
Voltage Pentode or Tetrode (with diode)
The database records UBF80 as a possible replacement for17C8.
No special restrictions are recorded for this substitution.
| Specification | UBF80 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Pentode or Tetrode (with diode) |
| Construction | Diode-Diode-Pentode | Diode-Diode-Pentode |
| Base | Not recorded | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | Not recorded |
| Sections | 3 | 3 |
| Heater voltage | 19 V | 17 V |
| Heater current | 0.1 A | 0.1 A |
Verify before substituting
Matching a base or heater voltage is not enough to prove that two tubes are interchangeable. Check pin connections, heater current, maximum ratings, bias requirements, warm-up behavior, and the equipment manufacturer’s service documentation before making a substitution.
View the complete UBF80 specifications →