117Z3
117Z3 has no equivalent designation confirmed by the archive. Completed sales put the typical price at $13.61 per tube.
The 117Z3 is a miniature cathode-type, close-spaced half-wave rectifier with a coated unipotential cathode.
Construction and Ratings
The 117Z3 has a miniature button base and can be used in any mounting position. Pin #1 of the socket must not be used as a tie post. The heater is rated at 117 volts and 40 mA AC or DC, permitting direct across-the-line heater operation without a dropping resistor.
Maximum ratings include an AC plate voltage (RMS) of 117 volts, a peak inverse voltage of 330 volts, a steady-state peak plate current of 540 mA, a steady-state DC output current of 90 mA, and a transient peak plate current of 2.5 amperes. The maximum DC heater-cathode voltage is 175 volts with the cathode positive and 100 volts with the cathode negative. The tube voltage drop, measured with the tube conducting 180 mA plate current, is 22.5 volts.
Applications
The 117Z3 is designed for service in three-way portable receivers. The Tung-Sol datasheet dated October 1, 1948 gives the 117Z3 characteristics, and the tube is interpreted according to RMA Standard M8-210.
| Measure | Per tube |
|---|---|
| Median | $13.61 |
| Typical range (25th–75th) | $10.62 – $15.67 |
| Most sales (10th–90th) | $6.69 – $36.75 |
| Extremes incl. outliers | $5.30 – $69.57 |
| Completed sales | 23 |
| Brand | Median | Range | Sales |
|---|---|---|---|
| RCA | $13.36 | $10.62 – $13.61 | 7 |
| Sylvania | $11.59 | $10.24 – $46.30 | 4 |
| Tung-Sol | $14.99 | $13.61 – $15.67 | 3 |
| Condition | Median | Sales |
|---|---|---|
| NOS | $14.89 | 10 |
| used | $13.61 | 7 |
Per-tube prices from completed sales, 2026-06-09 to 2026-10-17. Matched pairs and quads are divided out. See the price index for how these move over time.
Original manufacturer datasheets for 117Z3, hosted by Frank Philipse's Electron Tube Data sheets.
| Manufacturer | Designation | Datasheet |
|---|---|---|
| Tung-Sol | 117Z3 | PDF (105 KB) |
| RCA (HB3) | 117Z3 | PDF (92 KB) |
Documents held here and used to write this page.
- 117Z3