John Kobbe
John Kobbe (? – ?) joined Tektronix in 1951 to work in the test department.
Having had no formal engineering education, Kobbe co-initiated a "scope class" to design and build an oscilloscope in the test department, during which he designed an un-blanking circuit and a simplified sweep circuit that were eventually used in the 300 series.
Kobbe then joined the Engineering department and later the Advanced Research group.
Products and Inventions
- unblanking and sweep circuits for 310, 315
- 575 curve tracer
- Use of lossy coax cable in scope probes: US Patent 2883619, Electrical Probe. John Kobbe and Bill Polits. Applied 1956. (PDF)
- US Patent 2,930,986, Distributed Amplifier, John Kobbe and Bill Polits. Applied 1956. (PDF)
- T581 CRT (ref. Staric/Margan paper)
Products by John Kobbe
| Model | Class | Description | Designers | Introduced |
|---|---|---|---|---|
| 315 | Oscilloscope | "Portable" tube scope | Frank Hood • Dick Ropiequet • John Kobbe • Ted Goodfellow • Jim Morrow | 1952 |
| 570 | Curve Tracer | Curve tracer for tubes | John Kobbe | 1955 |
| K | Plug-in | 30 MHz amplifier plug-in | John Kobbe | 1955 |
| 310 | Oscilloscope | 4 MHz oscilloscope | Frank Hood • John Kobbe | 1955 |
| G | Plug-in | 20 MHz differential amplifier | John Kobbe | 1955 |
| 575 | Curve Tracer | Curve tracer for transistors | John Kobbe | 1957 |
| 310A | Oscilloscope | 4 MHz oscilloscope | Frank Hood • John Kobbe | 1959 |
| CA | Plug-in | 24 MHz dual-channel amplifier | John Kobbe • Bill Polits | 1959 |
Components by John Kobbe
| Model | Class | Description | Designers | Used in |
|---|---|---|---|---|
| 154-0696-00 | CRT | CRT | John Kobbe | 213 |
| T54 | CRT | CRT | John Kobbe | 541 • 545 |
| T581 | CRT | CRT | John Kobbe | 581 • 585 |
| T5810 | CRT | CRT | John Kobbe | 581A • 585A |
Publications
- http://www.vintagetek.org/wp-content/uploads/2011/10/Tek-series-500-development.pdf
- http://www.vintagetek.org/my-early-tektronix-days-by-john-kobbe-2/
