Tube cross-reference
18FX6 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 18FX6 voltage radio detector converter. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 18FX6
The following tubes are recorded as possible replacements for 18FX6. This direction does not establish that 18FX6 can replace them.
Voltage Radio Detector Converter
The database records 18FX6A as a possible replacement for18FX6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Radio Detector Converter |
| Construction | Heptode | Heptode |
| Base | 7CH | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 18 V | 18 V |
| Heater current | 0.1 A | 0.1 A |
Where 18FX6 can be used as the replacement
In these recorded relationships, 18FX6 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 18FX6.
Voltage Radio Detector Converter
The database records 18FX6 as a possible replacement for18FX6A.
- No-warmup series circuits only
| Specification | 18FX6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Radio Detector Converter |
| Construction | Heptode | Heptode |
| Base | 7CH | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 18 V | 18 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 18FX6 specifications →