7189
7189 has no equivalent designation confirmed by the archive. Completed sales put the typical price at $35.85 per tube.
The 7189 is a push-pull AF power amplifier tube intended for Class AB operation.
Ratings
The datasheet gives a maximum plate dissipation of 12 watts and a maximum plate current of 65 mA. The maximum AC-signal grid No. 2 input is given as 2 watts in one place and 4 watts in another. The maximum heater-cathode voltage is 100 volts with the heater either negative or positive with respect to the cathode.
Typical Operation
Typical operating values are given for two tubes in push-pull. In one condition, the plate supply voltage is 400 volts, the grid No. 2 supply voltage is 300 volts, and the grid No. 1 voltage is −15 volts. The signal grid No. 1 voltage is 14.8 volts. Under this condition, the zero-signal plate current is 15 mA and the maximum-signal plate current is 105 mA; the zero-signal grid No. 2 current is 1.6 mA and the maximum-signal grid No. 2 current is 25 mA. The effective load resistance (plate to plate) is 8000 ohms. Total harmonic distortion is given as 4 percent maximum, and the maximum signal power output is 24 watts.
| Measure | Per tube |
|---|---|
| Median | $35.85 |
| Typical range (25th–75th) | $23.46 – $48.24 |
| Most sales (10th–90th) | $17.30 – $60.00 |
| Extremes incl. outliers | $10.71 – $75.00 |
| Completed sales | 34 |
| Brand | Median | Range | Sales |
|---|---|---|---|
| GE | $35.29 | $23.50 – $39.99 | 5 |
| Amperex | $49.66 | $45.32 – $66.25 | 4 |
| RCA | $35.36 | $34.32 – $75.00 | 4 |
| Sylvania | $33.16 | $32.00 – $67.50 | 3 |
| Mullard | $23.46 | $22.50 – $60.00 | 3 |
| Condition | Median | Sales |
|---|---|---|
| NOS | $39.99 | 11 |
| used | $23.50 | 11 |
Per-tube prices from completed sales, 2026-07-03 to 2026-09-28. Matched pairs and quads are divided out. See the price index for how these move over time.
Original manufacturer datasheets for 7189, hosted by Frank Philipse's Electron Tube Data sheets.
| Manufacturer | Designation | Datasheet |
|---|---|---|
| RCA (HB3) | 7189 | PDF (301 KB) |
| Tung-Sol | 7189 | PDF (124 KB) |
| Sylvania | 7189 | PDF (109 KB) |
| RCA (RC30) | 7189 | PDF (62 KB) |
Documents held here and used to write this page.
- 7189