7199
7199 has no equivalent designation confirmed by the archive. Completed sales put the typical price at $32.19 per tube.
The 7199 is a triode-pentode vacuum tube designed primarily for high-fidelity audio applications. The pentode section is suited to preamplifier service, while the triode section is intended for use as a phase inverter. The tube features exceptionally low hum and noise output.
Construction
The Sylvania datasheet for the 7199 was prepared and released by the Technical Publications Section, Emporium, Pennsylvania, in August 1959. The tube has a heater voltage of 6.3 volts and may be mounted in any position.
Ratings
The triode section has a maximum plate voltage of 215 volts and a maximum plate dissipation of 2.4 watts. The pentode section has a maximum plate voltage of 220 volts, a maximum grid No. 2 voltage of 130 volts, a maximum plate dissipation of 3.0 watts, and a maximum grid No. 2 dissipation of 0.6 watt. The heater-cathode voltage, with the heater negative with respect to the cathode, has a maximum total DC and peak of 200 volts. With the heater positive with respect to the cathode, the maximum DC is 100 volts and the maximum total DC and peak is 200 volts.
Typical Operating Characteristics
Under typical operating conditions, the triode section has a plate current of 9.0 mA, a transconductance of 2100 micromhos, and a plate resistance of 0.0081 megohm. The triode section has an amplification factor of 17. The pentode section, under typical operating conditions, has a plate current of 12.5 mA, a grid No. 2 current of 3.5 mA, a transconductance of 7000 micromhos, and a plate resistance of 1.0 megohm.
Capacitances
The triode section has a grid-to-plate capacitance of 2.0 micromicrofarads, an input capacitance of 2.3 micromicrofarads, and an output capacitance of 0.3 micromicrofarad. The pentode section has a maximum grid No. 1 to plate capacitance of 0.06 micromicrofarad, an input capacitance of 5.0 micromicrofarads, and an output capacitance of 2.0 micromicrofarads.
| Measure | Per tube |
|---|---|
| Median | $32.19 |
| Typical range (25th–75th) | $27.71 – $44.95 |
| Most sales (10th–90th) | $20.00 – $59.99 |
| Extremes incl. outliers | $10.47 – $103.00 |
| Completed sales | 92 |
| Brand | Median | Range | Sales |
|---|---|---|---|
| RCA | $32.38 | $25.98 – $38.95 | 45 |
| GE | $31.27 | $25.00 – $39.99 | 13 |
| Sylvania | $30.37 | $27.99 – $59.80 | 12 |
| Raytheon | $55.80 | $19.48 – $63.00 | 3 |
| Tung-Sol | $39.99 | $30.00 – $49.99 | 3 |
| Condition | Median | Sales |
|---|---|---|
| NOS | $35.87 | 46 |
| used | $28.24 | 26 |
Per-tube prices from completed sales, 2026-07-02 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 7199, hosted by Frank Philipse's Electron Tube Data sheets.
| Manufacturer | Designation | Datasheet |
|---|---|---|
| Sylvania | 7199 | PDF (507 KB) |
| RCA (HB3) | 7199 | PDF (308 KB) |
| RCA (RC30) | 7199 | PDF (145 KB) |
Documents held here and used to write this page.
- engineering data service