407A
407A has no equivalent designation confirmed by the archive. Completed sales put the typical price at $8.21 per tube.
What 407A Sells For
| Measure | Per tube |
|---|---|
| Median | $8.21 |
| Typical range (25th–75th) | $7.31 – $10.47 |
| Most sales (10th–90th) | $2.71 – $46.07 |
| Extremes incl. outliers | $2.71 – $46.07 |
| Completed sales | 8 |
By Brand
| Brand | Median | Range | Sales |
|---|---|---|---|
| Western Electric | $7.49 | $5.00 – $9.12 | 7 |
By Condition
| Condition | Median | Sales |
|---|---|---|
| NOS | $9.03 | 6 |
Per-tube prices from completed sales, 2026-06-26 to 2026-09-07. Matched pairs and quads are divided out. See the price index for how these move over time.
Datasheets
Original manufacturer datasheets for 407A, hosted by Frank Philipse's Electron Tube Data sheets.
| Manufacturer | Designation | Datasheet |
|---|---|---|
| LM Ericsson | 407A | PDF (1887 KB) |
| Sylvania | 407A | PDF (379 KB) |
| Tung-Sol | 407A | PDF (241 KB) |
| RCA (HB3) | 407A | PDF (63 KB) |
In the Archive
Documents held here and used to write this page.
- TWIN TRIODE 407A