Basing (pinout)
Bottom view — the socket as you see it from the wiring side. Hover, tap, or focus a pin to name it. Read from the datasheet basing diagram (how to read these →).
Hover, tap, or focus a pin to name it.
- High voltage (B+)
- Control grid
- Cathode
- Heater / filament
- No connection
Viewed from below (socket / wiring side) · octal · basing 7AC
⚡ Oxblood pins sit at B+ — hundreds of volts in service, lethal, and still charged after power-off.
Datasheets
Primary manufacturer data, via public tube-data archives. The model below is fitted to the tabulated "average characteristics" in these sheets; the datasheet files themselves are linked, never rehosted.
| Publisher | Type | Source |
|---|---|---|
| RCA | 6L6 / 6L6-G | frank.pocnet.net ↗ |
| RCA | 6L6GC | frank.pocnet.net ↗ |
| Tung-Sol | 5881 | frank.pocnet.net ↗ |
Circuit Codex model
A CC0 ngspice model in the Koren form, fitted here to the published anchor — no parameters copied from other model collections. Methodology →
- Anchor
- shares the 5881/6L6GC family model (see reference/tubes/5881.yaml)
- Source
- RCA Receiving Tube Manual RC-19, 1959, average characteristics (6L6 family)
- Note
- No separate 6L6G SPICE model is carried; the 5F4 netlist instantiates the 5881 model for the output pair (see amps/5f4/notes.md). This entry exists so the published-layout socket pins validate against the real 6L6G basing. Caveat: because the simulation borrows the 5881/6L6GC-anchored model, any headroom or maximum-rating figure it produces reflects the 6L6GC family, not the real 6L6G — the original coke-bottle 6L6/6L6-G carries markedly lower plate-dissipation and voltage ratings, and those conclusions do not transfer to it.
- File
- models/5881.inc ↗