6AX5GT
6AX5GT has no equivalent designation confirmed by the archive. Completed sales put the typical price at $15.27 per tube.
Description
The 6AX5GT is a full-wave rectifier tube with a short-intermediate-shell octal base.
Construction
The tube has a maximum overall length of 3-5/4 inches, a maximum seated length of 2-3 inches, and a maximum diameter of 1-9 inches. Its bulb length is 3-5/4 inches. Pin 2 and pin 7 are the heater connections. Pin 3 serves as the plate of diode No. 1, pin 7 as the plate of diode No. 2, and pin 8 as the cathode.
Ratings and Operation
The maximum hot-switching transient plate current duration is 0.2 second. The RCA datasheet provides operating characteristics for full-wave circuits with both capacitor-input and choke-input filters, using AC plate-to-plate supply voltages of 700 or 900 volts RMS.
With a choke-input filter at 700 volts AC plate-to-plate, the DC output voltage is approximately 270 volts at half-load (75 mA) and approximately 250 volts at full-load (150 mA). At 900 volts AC plate-to-plate, the DC output voltage is approximately 365 volts at half-load (62.5 mA) and approximately 350 volts at full-load (125 mA). Voltage regulation from half-load to full-load is approximately 20 volts at 700 volts AC input and 15 volts at 900 volts AC input.
| Measure | Per tube |
|---|---|
| Median | $15.27 |
| Typical range (25th–75th) | $11.05 – $18.99 |
| Most sales (10th–90th) | $6.91 – $25.30 |
| Extremes incl. outliers | $4.50 – $30.00 |
| Completed sales | 28 |
| Brand | Median | Range | Sales |
|---|---|---|---|
| RCA | $12.50 | $8.00 – $15.20 | 9 |
| GE | $14.44 | $13.89 – $15.69 | 4 |
| Raytheon | $15.99 | $9.00 – $19.10 | 3 |
| Tung-Sol | $20.00 | $10.25 – $25.30 | 3 |
| Condition | Median | Sales |
|---|---|---|
| NOS | $15.58 | 13 |
| used | $15.16 | 10 |
Per-tube prices from completed sales, 2026-07-14 to 2026-09-21. Matched pairs and quads are divided out. See the price index for how these move over time.
Original manufacturer datasheets for 6AX5GT, hosted by Frank Philipse's Electron Tube Data sheets.
| Manufacturer | Designation | Datasheet |
|---|---|---|
| RCA (HB3) | 6AX5GT | PDF (419 KB) |
| Tung-Sol | 6AX5GT | PDF (298 KB) |
Documents held here and used to write this page.
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