7027
7027 has no equivalent designation confirmed by the archive. Completed sales put the typical price at $48.67 per tube.
Description
The 7027 is a push-pull AF power amplifier tube intended for Class AB operation in high-fidelity audio-amplifier applications. It uses an 18-pin base, JETEC B8-191. Its maximum overall length is 4.06 inches and its maximum diameter is 1.63 inches.
Construction
The tube's pinout includes Pin 1 – Grid No. 2, Pin 2 – Heater, Pin 3 – Plate, Pin 4 – Grid No. 2, and Pin 5 – Grid No. 1.
Ratings
The 7027 has a maximum plate supply voltage of 450 volts and a maximum plate and screen-grid supply voltage of 450 volts. The maximum peak heater-cathode voltage is 200 volts, whether the heater is negative or positive with respect to the cathode. For fixed-bias operation, the maximum grid No. 1 circuit resistance is 0.1 megohm; for cathode-bias operation, it is 0.5 megohm.
| Measure | Per tube |
|---|---|
| Median | $48.67 |
| Typical range (25th–75th) | $34.99 – $70.99 |
| Most sales (10th–90th) | $28.95 – $106.67 |
| Extremes incl. outliers | $14.95 – $214.99 |
| Completed sales | 42 |
| Brand | Median | Range | Sales |
|---|---|---|---|
| RCA | $57.95 | $35.40 – $77.00 | 25 |
| GE | $35.13 | $27.02 – $57.00 | 6 |
| Sylvania | $35.31 | $31.28 – $60.00 | 3 |
| Condition | Median | Sales |
|---|---|---|
| NOS | $47.50 | 17 |
| used | $46.67 | 16 |
Per-tube prices from completed sales, 2026-07-11 to 2026-09-25. Matched pairs and quads are divided out. See the price index for how these move over time.
Original manufacturer datasheets for 7027, hosted by Frank Philipse's Electron Tube Data sheets.
| Manufacturer | Designation | Datasheet |
|---|---|---|
| RCA (HB3) | 7027 | PDF (342 KB) |
| JJ | 7027 | PDF (122 KB) |
Documents held here and used to write this page.
- AVERAGE PLATE CHARACTERISTICS TRIODE CONNECTION