45
45 has no equivalent designation confirmed by the archive. Completed sales put the typical price at $63.34 per tube.
Construction
The 45 is a vacuum tube with a coated unipotential cathode heater rated for 6.3 volts AC or DC at 0.7 ampere. It uses an ST-14 bulb with a 6-pin medium base. The base pinout assigns pin 1 to the heater, pin 2 to the plate, pin 4 to the grid, pin 5 to the cathode and screen, and pin 6 to the heater.
Physical Dimensions
The tube has a maximum overall length of 4-11/16 inches, a maximum seated height of 4-1/16 inches, and a maximum diameter of 1-13/16 inches.
Datasheet References
The Radiotron datasheet refers to type 6F6-G for additional data and curves.
Base UX4, viewed from below (the wiring side), pins numbered clockwise from the key. Read from the datasheet's basing table and checked against it automatically — confirm against the original datasheet before wiring.
| Measure | Per tube |
|---|---|
| Median | $63.34 |
| Typical range (25th–75th) | $38.00 – $130.99 |
| Most sales (10th–90th) | $23.17 – $205.00 |
| Extremes incl. outliers | $4.62 – $368.98 |
| Completed sales | 177 |
| Brand | Median | Range | Sales |
|---|---|---|---|
| RCA | $60.90 | $34.99 – $131.95 | 44 |
| Sylvania | $64.50 | $38.00 – $134.50 | 31 |
| National Union | $91.19 | $62.49 – $264.50 | 11 |
| Tung-Sol | $63.34 | $48.94 – $99.95 | 10 |
| Raytheon | $180.00 | $69.90 – $205.00 | 9 |
| Philco | $54.69 | $31.50 – $72.58 | 6 |
| Ken-Rad | $66.26 | $20.50 – $71.95 | 6 |
| Arcturus | $101.50 | $52.50 – $164.50 | 5 |
| Cunningham | $110.72 | $85.00 – $139.98 | 4 |
| Condition | Median | Sales |
|---|---|---|
| NOS | $63.44 | 37 |
| used | $62.26 | 122 |
Per-tube prices from completed sales, 2026-08-08 to 2026-10-17. Matched pairs and quads are divided out. See the price index for how these move over time.
Original manufacturer datasheets for 45, hosted by Frank Philipse's Electron Tube Data sheets.
| Manufacturer | Designation | Datasheet |
|---|---|---|
| AWV | 45 | PDF (230 KB) |
| Tung-Sol | 45 | PDF (169 KB) |
| RCA (HB3) | 45 | PDF (133 KB) |
| Sylvania | 45 | PDF (73 KB) |
| RCA | 45 | PDF (40 KB) |
Documents held here and used to write this page.
- RADIOTRON