5R4GY
5R4GY has no equivalent designation confirmed by the archive. Completed sales put the typical price at $43.98 per tube.
The 5R4GY is a full-wave rectifier tube. It has a medium-shell octal 5-pin base made of Micano.
Construction
Pin 1 of the 5R4GY has no connection. Pins 2 and 8 are filament connections, and pin 4 is plate No. 2. The maximum overall length is 5-5/16 inches, the maximum seated length is 4-3/4 inches, and the maximum diameter is 2-1/16 inches.
Mounting
The 5R4GY may be mounted vertically, or horizontally with pins 1 and 4 in a vertical plane.
Ratings and Typical Operation
The datasheet gives maximum peak inverse plate voltage ratings of 2100, 2400, and 2800 volts for altitudes up to 40000 ft and up to 20000 ft. Maximum peak plate current per plate ratings are 250, 175, and 150 mA with capacitor input to filter, and 250, 250, and 175 mA with choke input to filter, at the corresponding altitudes. Typical operation values for AC plate-to-plate supply voltage are 1400, 1500, and 1800 volts at full load, and 1500, 1700, and 2000 volts at no load.
| Measure | Per tube |
|---|---|
| Median | $43.98 |
| Typical range (25th–75th) | $22.97 – $49.99 |
| Most sales (10th–90th) | $11.95 – $179.00 |
| Extremes incl. outliers | $9.00 – $290.00 |
| Completed sales | 21 |
| Brand | Median | Range | Sales |
|---|---|---|---|
| RCA | $24.48 | $17.73 – $46.95 | 8 |
| Brimar | $228.72 | $179.00 – $290.00 | 3 |
| Condition | Median | Sales |
|---|---|---|
| NOS | $49.99 | 5 |
| used | $28.00 | 10 |
Per-tube prices from completed sales, 2026-07-28 to 2026-09-12. Matched pairs and quads are divided out. See the price index for how these move over time.
Original manufacturer datasheets for 5R4GY, hosted by Frank Philipse's Electron Tube Data sheets.
| Manufacturer | Designation | Datasheet |
|---|---|---|
| RCA (HB3) | 5R4GY | PDF (158 KB) |
| Tung-Sol | 5R4GY | PDF (153 KB) |
| Ferranti | 5R4GY | PDF (103 KB) |
| Brimar | 5R4GY | PDF (60 KB) |
Documents held here and used to write this page.
- 5R4GY
1 further designation appears alongside 5R4GY in the literature but below the evidence threshold used here, so it is not listed as equivalent.