6084
6084 is also designated E80F. Completed sales put the typical price at $26.69 per tube.
6084
The 6084 is a long-life audio-frequency pentode of rigid construction, featuring an indirectly heated, coated unipotential cathode. It is housed in a T6½ bulb with a small-button noval 9-pin base.
Construction and Ratings
The Philips datasheet gives maximum plate voltage (without current) as 550 volts and maximum plate voltage as 300 volts. Maximum plate dissipation is 1 watt. Maximum grid No.2 voltage (without current) is 550 volts, with a maximum operating grid No.2 voltage of 200 volts and a maximum grid No.2 dissipation of 0.3 watt. Maximum negative grid No.1 bias is 100 volts, and maximum grid No.1 circuit resistance is 3 megohms. Maximum cathode current is 7.5 mA. The maximum external resistance between heater and cathode is 20,000 ohms, and the maximum voltage between heater and cathode is 60 volts. The heater is rated at 6.3 volts and 300 mA.
Characteristics
Typical characteristics are given at a plate voltage of 250 volts, grid No.3 voltage of 0 volts, grid No.2 voltage of 100 volts, and grid No.1 bias of -2 volts. At this operating point, plate current is 3 mA, grid No.2 current is 0.55 mA, transconductance is 1850 micromhos, and plate resistance is 1.8 megohms. The amplification factor of grid No.2 with respect to grid No.1 is 25.
Capacitances
Direct interelectrode capacitances are given as: plate to all other elements except grid No.1, 7.1 µµF; grid No.1 to all other elements except plate, 5.1 µµF; plate to grid No.1, maximum 0.025 µµF; grid No.1 to heater, maximum 0.002 µµF; and cathode to heater, 3.7 µµF.
Physical and Mechanical
The JETEC basing designation is 9B J. Pin connections are: pin 1 grid No.2, pin 2 internal, pin 3 cathode, pin 4 heater, pin 5 heater, pin 6 plate, pin 7 internal shield, pin 8 grid No.3, and pin 9 grid No.1. Maximum overall length is 2 5/8 inches, maximum seated height is 2 3/8 inches, and bulb length excluding tip is 2 inches ± 3/32 inch. Maximum diameter is 7/8 inch. The mounting position is any.
| Designation | Evidence | Confidence |
|---|---|---|
| E80F | 62 independent documents | strong |
Equivalence is asserted only where the archive's own literature states it directly, in at least 40 separate documents. Tubes that merely substitute in some circuits are not listed here.
| Measure | Per tube |
|---|---|
| Median | $26.69 |
| Typical range (25th–75th) | $22.00 – $41.95 |
| Most sales (10th–90th) | $20.28 – $45.00 |
| Extremes incl. outliers | $13.00 – $45.00 |
| Completed sales | 10 |
| Brand | Median | Range | Sales |
|---|---|---|---|
| Amperex | $33.49 | $26.98 – $41.95 | 5 |
| Philips | $23.24 | $20.28 – $43.00 | 4 |
| Condition | Median | Sales |
|---|---|---|
| NOS | $26.98 | 7 |
| used | $26.20 | 3 |
Per-tube prices from completed sales, 2026-07-05 to 2026-09-14. Matched pairs and quads are divided out. See the price index for how these move over time.
Original manufacturer datasheets for 6084, hosted by Frank Philipse's Electron Tube Data sheets.
| Manufacturer | Designation | Datasheet |
|---|---|---|
| Philips | 6084 | PDF (271 KB) |
| Philips | E80F | PDF (554 KB) |
| Philips | E80F | PDF (412 KB) |
Documents held here and used to write this page.
- E 80 F (filed under E80F)
- ### **PHILIPS**