211
211 has no equivalent designation confirmed by the archive. Completed sales put the typical price at $180.50 per tube.
Construction
The 211 is a thoriated-tungsten filament tube. Its filament operates at 10 volts AC or DC and draws 3.25 amperes. The amplification factor is 12, and the grid-to-plate direct interelectrode capacitance is 5.4 μμf.
Ratings
The datasheet specifies a maximum plate dissipation of 100 watts. For AF power amplifier and modulator Class B service, the maximum DC plate voltage is 1250 volts. For RF power amplifier Class C telephony service, the maximum DC plate voltage is 1000 volts. Maximum plate dissipation is 100 watts for both RF power amplifier Class B telephony service and plate-modulated RF power amplifier Class C telephony service.
Applications
The datasheet provides typical operation values for two tubes in Class B AF power amplifier and modulator service, as well as for RF power amplifier Class B telephony, RF power amplifier Class C telephony, and plate-modulated RF power amplifier Class C telephony service. The datasheet states that data on operating frequencies for the 211 are given on the sheet TRANS. TUBE RATINGS vs FREQUENCY. The datasheet is dated MAY 1, 1950.
| Measure | Per tube |
|---|---|
| Median | $180.50 |
| Typical range (25th–75th) | $119.99 – $353.00 |
| Most sales (10th–90th) | $66.82 – $587.50 |
| Extremes incl. outliers | $32.99 – $1,170.95 |
| Completed sales | 81 |
| Brand | Median | Range | Sales |
|---|---|---|---|
| GE | $178.13 | $129.03 – $250.00 | 38 |
| RCA | $258.59 | $170.00 – $319.95 | 9 |
| Western Electric | $723.35 | $500.00 – $999.99 | 7 |
| Condition | Median | Sales |
|---|---|---|
| NOS | $375.00 | 11 |
| used | $188.03 | 45 |
| current | $89.75 | 13 |
Per-tube prices from completed sales, 2024-09-29 to 2026-10-22. Matched pairs and quads are divided out. See the price index for how these move over time.
Original manufacturer datasheets for 211, hosted by Frank Philipse's Electron Tube Data sheets.
| Manufacturer | Designation | Datasheet |
|---|---|---|
| RCA (HB3) | 211 | PDF (277 KB) |
Documents held here and used to write this page.
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