John Kobbe: Difference between revisions

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[[File:Kobbe_1959.jpg|thumb|300px|right|John Kobbe, 1959]]
[[File:Kobbe_1959.jpg|thumb|300px|right|John Kobbe, 1959]]
{{Person
|Names=John R. Kobbe
|Birth date=
|Birth place=
|Death date=2013-03-07
|Death place=
|Countries=
|Affiliations=Tektronix;
}} joined Tektronix in 1951 to work in the test department.


'''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.


Having had no formal engineering education, Kobbe
Kobbe then joined the Engineering department and later the Advanced Research group.
co-initiated a "scope class" to design and build an oscilloscope
in the test department, don't ring 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 into the Advanced Research group..


==Products and Inventions==
==Products and Inventions==


* Use of lossy coax cable in scope probes: [http://www.freepatentsonline.com/2883619.html US Patent 2883619, Electrical Probe]. John Kobbe and [[Bill Polits]] (filed 1956)
: see [http://wpeval.wilhelmphoto.com/?page_id=13 Tek Stories: Oscilloscope Patents]
:and [http://dfad.com.au/links/THE%20SECRET%20WORLD%20OF%20PROBES%20OCt09.pdf Doug Ford, ''The Secret World of Oscilloscope Probes'']
* unblanking and sweep circuits for [[310]], [[315]]
* unblanking and sweep circuits for [[310]], [[315]]
* [[575]] curve tracer
* [[570]] curve tracer
* Use of lossy coax cable in scope probes: [[Patent US 2883619A|US Patent 2883619, ''Electrical Probe'']]. [[John Kobbe]] and [[Bill Polits]]. Applied 1956.
: see also [http://dfad.com.au/links/THE%20SECRET%20WORLD%20OF%20PROBES%20OCt09.pdf Doug Ford, ''The Secret World of Oscilloscope Probes'']
* [[Patent US 2930986A|US Patent 2,930,986, ''Distributed Amplifier'']]. [[John Kobbe]] and [[Bill Polits]]. Applied 1956. ([http://patentimages.storage.googleapis.com/pdfs/US2930986.pdf PDF])
* [[T581]] CRT (ref. [http://extras.springer.com/2006/978-0-387-28340-1/wbapdx51.pdf Staric/Margan paper])


==Publications==
==Links==


* http://www.vintagetek.org/wp-content/uploads/2011/10/Tek-series-500-development.pdf
* [https://www.vintagetek.org/my-early-tektronix-days-by-john-kobbe-2/ My Early Tektronix Days] by John Kobbe
* http://www.vintagetek.org/my-early-tektronix-days-by-john-kobbe-2/
* [https://vintagetek.org/oscilliscope-patents/ Oscilloscope Patents] by John Kobbe
* [http://w140.com/US2930986.pdf US Patent 2,930,986: J. R. Kobbe, "Distributed Amplifier"]
* [https://www.vintagetek.org/wp-content/uploads/2011/10/Tek-series-500-development.pdf How the Tektronix Series 500 Scopes Came Together] by John Kobbe
* [https://tek-retirees.com/wp-content/uploads/simple-file-list/Newsletters/2013_05_may.pdf Death Notice in May 2013 Tek Retirees newsletter]
{{Designer|John Kobbe}}
{{Patents|John Kobbe}}


==Photos==
==Photos==

Latest revision as of 05:25, 13 December 2023

John Kobbe, 1959

John R. Kobbe (? – d. 2013-03-07) 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

see also Doug Ford, The Secret World of Oscilloscope Probes

Links

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

Patents by John Kobbe

Page Office Number Title Inventors Company Filing date Grant date
Patent US 2804571A US 2804571A Unblanking circuit for cathode ray tubes John Kobbe Tektronix Inc 1953-04-20 1957-08-27
Patent US 2791642A US 2791642A Phase inversion circuit John Kobbe Tektronix Inc 1953-07-06 1957-05-07
Patent US 2853609A US 2853609A Multivibrator hold off circuit Dick Ropiequet • John Kobbe Tektronix Inc 1955-02-21 1958-09-23
Patent US 2930986A US 2930986A Distributed amplifier John Kobbe • Bill Polits Tektronix Inc 1956-02-29 1960-03-29
Patent US 2883619A US 2883619A Electrical probe John Kobbe • Bill Polits Tektronix Inc 1956-02-29 1959-04-21
Patent US 3061788A US 3061788A Multivibrator hold-off circuit John Kobbe Tektronix Inc 1958-09-17 1962-10-30
Patent US 3122652A US 3122652A Time base generator John Kobbe • Oz Svehaug Tektronix Inc 1960-12-21 1964-02-25
Patent US 3185887A US 3185887A Deflection amplifier compensation linearizer circuit John Kobbe Tektronix Inc 1961-03-20 1965-05-25
Patent US 3168679A US 3168679A Intensity control compensation circuit for use in a cathode ray oscilloscope John Kobbe Tektronix Inc 1961-05-08 1965-02-02
Patent US 3219801A US 3219801A Pulse counter John Kobbe • Sam McCutcheon Tektronix Inc 1961-08-25 1965-11-23
Patent US 3248655A US 3248655A Ratchet memory circuit and sampling system employing such circuit John Kobbe • Cliff Moulton • John V Rogers • Norm Winningstad Tektronix Inc 1962-05-07 1966-04-26
Patent US 3168656A US 3168656A Transmission line circuit having termination impedance which includes emitter junction of transistor John Kobbe Tektronix Inc 1962-06-18 1965-02-02
Patent US 3247462A US 3247462A Balanced paraphase amplifier including a feed forward path John Kobbe Tektronix Inc 1963-08-19 1966-04-19

Photos

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