6CS6
6CS6 is also designated EH90. Completed sales put the typical price at $10.54 per tube.
Description
The 6CS6 is a miniature tube used as a gated amplifier in color and black-and-white television receivers. It may also be used as a combined sync separator and sync clipper. The tube requires a miniature 7-contact socket.
Ratings
The 6CS6 has a heater voltage of 6.3 volts and a heater current of 0.6 ampere. The maximum grid-circuit resistance is 0.5 megohm.
Related Types
Types 3CS6, 4CS6, and 12CS6 are identical with type 6CS6 except for heater ratings. The 3CS6 has a heater voltage of 3.15 volts, and the 4CS6 has a heater voltage of 4.2 volts.
| Designation | Evidence | Confidence |
|---|---|---|
| EH90 | 49 independent documents | confirmed |
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 | $10.54 |
| Typical range (25th–75th) | $8.90 – $13.93 |
| Most sales (10th–90th) | $6.21 – $20.31 |
| Extremes incl. outliers | $2.75 – $20.54 |
| Completed sales | 14 |
| Brand | Median | Range | Sales |
|---|---|---|---|
| RCA | $10.23 | $9.47 – $14.59 | 4 |
| Sylvania | $11.89 | $6.99 – $13.93 | 3 |
| GE | $10.49 | $6.21 – $10.60 | 3 |
| Condition | Median | Sales |
|---|---|---|
| NOS | $10.99 | 11 |
Per-tube prices from completed sales, 2026-07-20 to 2026-09-22. Matched pairs and quads are divided out. See the price index for how these move over time.
Original manufacturer datasheets for 6CS6, hosted by Frank Philipse's Electron Tube Data sheets.
| Manufacturer | Designation | Datasheet |
|---|---|---|
| RCA (RC30) | 6CS6 | PDF (447 KB) |
| General Electric | 6CS6 | PDF (339 KB) |
| Tung-Sol | 6CS6 | PDF (282 KB) |
| RCA (HB3) | 6CS6 | PDF (187 KB) |
| Philips | EH90 | PDF (278 KB) |
Documents held here and used to write this page.
- MAXIMUM CIRCUIT VALUES Grid-Circuit Resistance ......
- EH90 PHILIPS (filed under EH90)