5755
5755 has no equivalent designation confirmed by the archive. Completed sales put the typical price at $19.34 per tube.
Description
The 5755 is a heater-cathode type double-triode of miniature construction, housed in a T-6½ glass envelope with a miniature button 9-pin base. It is designed for precision DC amplifiers, computers, and regulated power supplies. Special cathode springs are incorporated to reduce microphonic response. The tube may be mounted in any position.
Ratings
Heater voltage is 6.3 or 12.6 volts, ±10%. When the heater is parallel-connected at 6.3 volts, heater current is 0.360 ampere. For each triode unit, maximum plate voltage is 250 volts, maximum plate dissipation is 1.0 watt, and maximum heater-cathode voltage is 75 volts. The grid current limit is 10⁻⁹ ampere.
Typical Operating Characteristics
At a plate voltage of 180 volts, plate current is 2.2 mA and transconductance is 1500 μmhos. At a plate voltage of 110 volts and grid voltage of −0.95 volts, plate current is 0.15 mA, transconductance is 500 μmhos, amplification factor is 70, and plate resistance is 9.14 megohms.
| Measure | Per tube |
|---|---|
| Median | $19.34 |
| Typical range (25th–75th) | $8.33 – $37.99 |
| Most sales (10th–90th) | $4.57 – $60.66 |
| Extremes incl. outliers | $2.94 – $84.38 |
| Completed sales | 18 |
| Brand | Median | Range | Sales |
|---|---|---|---|
| Raytheon | $13.64 | $7.99 – $20.45 | 12 |
| Western Electric | $40.23 | $29.98 – $60.66 | 6 |
| Condition | Median | Sales |
|---|---|---|
| NOS | $20.45 | 11 |
| used | $12.94 | 5 |
Per-tube prices from completed sales, 2026-06-21 to 2026-09-09. Matched pairs and quads are divided out. See the price index for how these move over time.
Documents held here and used to write this page.
- TECHNICAL INFORMATION