Tube cross-reference
17C8 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 17C8 voltage pentode or tetrode (with diode). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 17C8
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.
UBF80 Voltage Radio Detector Converter
- Base
- Not recorded
- Socket
- B9A
- Base pins
- 9
- Sections
- 3
- Heater voltage
- 19 V
- Heater current
- 0.1 A
Replacement tubes for 17C8
The following tubes are recorded as possible replacements for 17C8. This direction does not establish that 17C8 can replace them.
Voltage Radio Detector Converter
The database records UBF80 as a possible replacement for17C8.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode or Tetrode (with diode) | Voltage Radio Detector Converter |
| Construction | Diode-Diode-Pentode | Diode-Diode-Pentode |
| Base | Not recorded | Not recorded |
| Socket | B9A | B9A |
| Base pins | Not recorded | 9 |
| Sections | 3 | 3 |
| Heater voltage | 17 V | 19 V |
| Heater current | 0.1 A | 0.1 A |
Where 17C8 can be used as the replacement
In these recorded relationships, 17C8 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 17C8.
Voltage Radio Detector Converter
The database records 17C8 as a possible replacement forUBF80.
No special restrictions are recorded for this substitution.
| Specification | 17C8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode or Tetrode (with diode) | Voltage Radio Detector Converter |
| Construction | Diode-Diode-Pentode | Diode-Diode-Pentode |
| Base | Not recorded | Not recorded |
| Socket | B9A | B9A |
| Base pins | Not recorded | 9 |
| Sections | 3 | 3 |
| Heater voltage | 17 V | 19 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 17C8 specifications →