6AL5
The 6AL5/12AL5 (European: EAA91/EB91/HAA91) (P/N 154-016,154-0016-00,154-0038-00) is a high-perveance dual diode vacuum tube with a 6.3 V, 0.3 A heater.
The 12AL5 (European type HAA91) is the same but has a 12.6 V, 0.15 A heater. Both have a B9A (Noval) miniature 9-pin base.
The 6AL5/12AL5 serves as the as the "disconnect diode" in the timebase circuit of many tube-era Tektronix scopes starting with the 511 in the 1940s and continuing through the 1960s in sweep plug-ins such as the 3B2 and other plug-ins such as Type C/Type CA.
Tek part number: 154-0016-00 (6AL5), 154-0038-00 (12AL5/HAA91)
| Aged/Checked/Matched Pair Details | ||
|---|---|---|
| Used in | Tek Part# | S/N Range |
| 535A, 545A, 585A | 157-0075-00 (12AL5) | All |
| 316, 317, 502A, 516 | 157-0104-00 (6AL5) | All |
| 53X, 54X series, 551, 580 | 157-0104-02 (6AL5) | All |
Reference:
Data and Links
- System: max. 420 V peak, max. 9 mA, 2.5 pF
- RCA 6AL5 data sheet
- 6AL5 / 12AL5 @ radiomuseum.org
Some instruments using part 6AL5
| Instrument | Manufacturer | Class | Model | Description | Introduced |
|---|---|---|---|---|---|
| 163 | Tektronix | Plug-in | 163 | Pulse Generator Module | 1952 |
| 181 | Tektronix | Pulse generator | 181 | Time-mark generator | 1955 |
| 190 | Tektronix | Signal generator | 190 | Constant-Amplitude Signal Generator | 1954 |
| 1M1 | Tektronix | Plug-in | 1M1 | Calibration plug-in | 1964 |
| 310 | Tektronix | Oscilloscope | 310A | 4 MHz oscilloscope | 1955 |
| 310A | Tektronix | Oscilloscope | 310A | 4 MHz oscilloscope | 1959 |
| 315 | Tektronix | Oscilloscope | 315 | "Portable" tube scope | 1952 |
| 316 | Tektronix | Oscilloscope | 316 | 10 MHz 3" tube scope | 1959 |
| 317 | Tektronix | Oscilloscope | 317 | 10 MHz 3" tube scope | 1959 |
| 3B1 | Tektronix | Plug-in | 3B1 | 10 MHz time base plug-in | 1962 |
| 3B1S | Tektronix | Plug-in | 3B1S | Sampling time base plug-in | 1961 |
| 3B2 | Tektronix | Plug-in | 3B2 | Delaying timebase plug-in | 1963 |
| 3B3 | Tektronix | Plug-in | 3B3 | Time Base plug-in | 1962 |
| 3B5 | Tektronix | Plug-in | 3B5 | Automatic time base plug-in | 1966 |
| 502 | Tektronix | Oscilloscope | 502 | 1 MHz dual beam differential scope | 1958 |
| 502A | Tektronix | Oscilloscope | 502A | 1 MHz dual beam differential scope | 1963 |
| 503 | Tektronix | Oscilloscope | 503 | 450 kHz differential-input scope | 1960 |
| 511 | Tektronix | Oscilloscope | 511 | 10 MHz Tube scope First Tektronix oscilloscope |
1947 |
| 511A | Tektronix | Oscilloscope | 511A | 10 MHz Tube scope | 1948 |
| 512 | Tektronix | Oscilloscope | 512 | Early 2 MHz scope | 1948 |
| 516 | Tektronix | Oscilloscope | 516 | 15 MHz dual-trace scope | 1960 |
| 517 | Tektronix | Oscilloscope | 517 | 50 MHz scope | 1951 |
| 524 | Tektronix | Oscilloscope | 524AD | TV waveform monitoring scope | 1953 |
| 526 | Tektronix | Audio/Video | 526 | NTSC Vectorscope | 1959 |
| 535 | Tektronix | Oscilloscope | 535 | 10 (15) MHz dual-timebase scope | 1954 |
| 545 | Tektronix | Oscilloscope | 545 | 30 (33) MHz oscilloscope | 1955 |
| 545A | Tektronix | Oscilloscope | 545A | 30 (33) MHz oscilloscope | 1959 |
| 549 | Tektronix | Oscilloscope | 549 | 30 MHz storage oscilloscope | 1965 |
| 551 | Tektronix | Oscilloscope | 551 | 27 MHz scope | 1958 |
| 565 | Tektronix | Oscilloscope | 565 | 10 MHz dual-beam scope | 1962 |
| 570 | Tektronix | Curve Tracer | 570 | Curve tracer for tubes | 1955 |
| 581 | Tektronix | Oscilloscope | 581 | 100 (95) MHz oscilloscope | 1959 |
| 581A | Tektronix | Oscilloscope | 581A | 85 MHz oscilloscope | 1963 |
| 585 | Tektronix | Oscilloscope | 585 | 100 (95) MHz oscilloscope | 1959 |
| 585A | Tektronix | Oscilloscope | 585 | 85 MHz oscilloscope | 1963 |
| C | Tektronix | Plug-in | Type (53)C | Dual-trace 8.5 (24) MHz amplifier | 1954 |
| T | Tektronix | Plug-in | Type T | Timebase plugin | 1957 |
| Telequipment D52 | Telequipment | Oscilloscope | D52 | 6 MHz dual-beam scope | 1968 |
| Telequipment D56 | Telequipment | Oscilloscope | D56 | 15 MHz 2-ch scope | (?) |
| Telequipment S52 | Telequipment | Oscilloscope | S52 | 3 MHz dual-channel scope | 1968 |