Linley Gumm: Difference between revisions

From TekWiki
Jump to navigation Jump to search
No edit summary
No edit summary
 
(16 intermediate revisions by 3 users not shown)
Line 1: Line 1:
=Linley Gumm recalls his experiences starting at Tek:=
[[File:Linley Gumm.jpg|thumb|right|200px|Linley Gumm]]
{{Person
|Names=Linley Ford Gumm
|Birth date=Jan 30, 1942
|Birth place=Spokane, WA
|Death date=
|Death place=
|Countries=USA
|Affiliations=Tektronix;
|Wikidata id=
}} (ham callsign K7HFD) was a Tek engineer 1964-1976, senior engineer 1976-1981, principal engineer 1981-1985, chief engineer from 1985.


I joined TEK on June 15, 1964 joining the Instrument Evaluation group under [[Jerry Shannon]].  
He recalls his experiences starting at Tek:
The first thing that happened to me was I spent something like the first nine weeks working as a test technician  
 
in Plant 2 in bldg. 39 testing [[545B]] and [[647]] scopes.  
<blockquote>
I joined Tek on June 15, 1964 joining the Instrument Evaluation group under [[Jerry Shannon]].  
The first thing that happened to me was I spent something like the first nine weeks  
working as a test technician in Plant 2 in [[Building 39]] testing [[545B]] and [[647]] scopes.  
I was never very good at it.  
I was never very good at it.  
Jerry put me there to make sure I understood the environment that new products went into.  
Jerry put me there to make sure I understood the environment that new products went into.  
On Sept 21, 1964 I would have been back at the Sunset plant working in the evaluation group (bldg. 81?)  
On Sept 21, 1964 I would have been back at the Sunset plant  
working in the evaluation group ([[Building 81]]?)  
working for [[Herb England]] for perhaps five weeks.  
working for [[Herb England]] for perhaps five weeks.  
I was so raw that I cringe at the memory.
I was so raw that I cringe at the memory.
</blockquote>


==Regarding the [[Media:Tek 106 design notes.pdf|possible Tek 106 design notes]] document==
Regarding the [[Media:Tek 106 design notes.pdf|possible Tek 106 design notes]] document:
<blockquote>
In any case, the only thing on that page that is familiar is my characteristic printed signature.  
In any case, the only thing on that page that is familiar is my characteristic printed signature.  
I do very vaguely remember reviewing some small aspect of a new generator that involved floating power supplies.  
I do very vaguely remember reviewing some small aspect of a new generator that involved floating power supplies.  
I was blown away at the time by the rather caviler use of same.  
I was blown away at the time by the rather cavalier use of same.  
It all made sense but it was wildly different from anything I had seen at the time.  
It all made sense but it was wildly different from anything I had seen at the time.  
The design of that generator was well along when I first saw it.
The design of that generator was well along when I first saw it.


The nomenclature of the "new 105" on these drawings
The nomenclature of the "new 105" on these drawings makes it almost certain that this is an early set of [[106|Type 106]] drawings.  
makes it almost certain that this is an early set of [[106|Type 106]] drawings.  
The [[105|Type 105]] was a physically large, high voltage (i.e. approximately 100 volts p-p) square wave generator.  
The [[105|Type 105]] was a physically large, high voltage (i.e. approximately 100 volts p-p) square wave generator.  
It was entirely done out of vacuum tubes so it also made extensive use of floating power supplies.  
It was entirely done out of vacuum tubes so it also made extensive use of floating power supplies.  
The 106 was a box to replace the 105,  
The 106 was a box to replace the 105, reducing its size plus adding the capability of generating  
reducing its size plus adding the capability of generating a lower voltage waveforms with a much faster risetime.
lower voltage waveforms with a much faster risetime.


At that time at TEK, the Instrument Evaluation organization was responsible for the design  
At that time at Tek, the Instrument Evaluation organization was responsible for the design and
and limited production of equipment used in manufacturing test.  
limited production of equipment used in manufacturing test.  
Over time some of these products were deemed to be of sufficient quality and interest  
Over time some of these products were deemed to be of sufficient quality and interest to be sold to the public as products,
to be sold to the public as products if for no other reason they were specified in oscilloscope manuals as necessary for calibration.  
if for no other reason than that they were specified in oscilloscope manuals as necessary for calibration.  
They would start out as 067- test fixtures and then later be given a product ID (I don't know if the 106 went this route).  
They would start out as 067- test fixtures and then later be given a product ID (I don't know if the 106 went this route).  
This involved things like time mark generators, sine wave sources, load test boxes, etc.  
This involved things like time mark generators, sine wave sources, load test boxes, etc.  
Therefore, a box to replace the 105 would be done in the Instrument Evaluation group.  
Therefore, a box to replace the 105 would be done in the Instrument Evaluation group.  
I noted [[Bill Lukins]] name on some of the documentation on the [Tekwiki] web site.  
I noted [[Bill Lukens]]' name on some of the documentation on the Tekwiki web site.  
I believe he was one of the major players in the 106 development.
I believe he was one of the major players in the 106 development.


(As a completely off the subject aside, the [[140|140 color bar generator]] started out as a 067- test fixture intended to test vector scopes.  
(As a completely off-the-subject aside, the [[140|140 color bar generator]] started out as a 067- test fixture  
I have some early front panels of same in my garage.  
intended to test vector scopes. I have some early front panels of same in my garage.  
Charlie, of course, fully intended to sell them as a product from the get go  
[[Charlie Rhodes|Charlie]], of course, fully intended to sell them as a product from the get-go  
but needed to pretend to be doing a cal fixture to get permission to develop it)
but needed to pretend to be doing a cal fixture to get permission to develop it.)


In any case, I don't believe I drew the diagram on that page.  
In any case, I don't believe I drew the diagram on that page.  
Line 43: Line 58:
Further, all of the lettering is much better than I have ever been able to do.  
Further, all of the lettering is much better than I have ever been able to do.  
The only thing I recognize on that page that might be done my me is the 3.9K notation scribbled above R402.
The only thing I recognize on that page that might be done my me is the 3.9K notation scribbled above R402.
</blockquote>
==Links==
* [[Media:LinleyGumm_TW_03271987.pdf|TekWeek March 27, 1987: Chief Engineer Linley Gumm]]
* [https://prabook.com/web/linley_ford.gumm/1383716 Linley Gumm] @ Prabook
* [https://www.nctatechnicalpapers.com/Paper/1972/1972-key-frequency-parameter-measurements-and-instruments Key Frequency Parameter Measurements And Instruments (1972)]
{{Documents|Author=Linley Gumm}}
{{Designer|Linley Gumm}}
{{Patents|Linley Gumm}}


<gallery>
<gallery>
File:1964-xx-xx_Sunset_(Bldgs_81_%26_86).jpg|Sunset Building 81
1964-xx-xx_Sunset_(Bldgs_81_%26_86).jpg|Sunset Building 81
</gallery>
</gallery>
[[Category:Tektronix people]]

Latest revision as of 04:56, 12 October 2023

Linley Gumm

Linley Ford Gumm (b. Jan 30, 1942 in Spokane, WA – ?) (ham callsign K7HFD) was a Tek engineer 1964-1976, senior engineer 1976-1981, principal engineer 1981-1985, chief engineer from 1985.

He recalls his experiences starting at Tek:

I joined Tek on June 15, 1964 joining the Instrument Evaluation group under Jerry Shannon. The first thing that happened to me was I spent something like the first nine weeks working as a test technician in Plant 2 in Building 39 testing 545B and 647 scopes. I was never very good at it. Jerry put me there to make sure I understood the environment that new products went into. On Sept 21, 1964 I would have been back at the Sunset plant working in the evaluation group (Building 81?) working for Herb England for perhaps five weeks. I was so raw that I cringe at the memory.

Regarding the possible Tek 106 design notes document:

In any case, the only thing on that page that is familiar is my characteristic printed signature. I do very vaguely remember reviewing some small aspect of a new generator that involved floating power supplies. I was blown away at the time by the rather cavalier use of same. It all made sense but it was wildly different from anything I had seen at the time. The design of that generator was well along when I first saw it.

The nomenclature of the "new 105" on these drawings makes it almost certain that this is an early set of Type 106 drawings. The Type 105 was a physically large, high voltage (i.e. approximately 100 volts p-p) square wave generator. It was entirely done out of vacuum tubes so it also made extensive use of floating power supplies. The 106 was a box to replace the 105, reducing its size plus adding the capability of generating lower voltage waveforms with a much faster risetime.

At that time at Tek, the Instrument Evaluation organization was responsible for the design and limited production of equipment used in manufacturing test. Over time some of these products were deemed to be of sufficient quality and interest to be sold to the public as products, if for no other reason than that they were specified in oscilloscope manuals as necessary for calibration. They would start out as 067- test fixtures and then later be given a product ID (I don't know if the 106 went this route). This involved things like time mark generators, sine wave sources, load test boxes, etc. Therefore, a box to replace the 105 would be done in the Instrument Evaluation group. I noted Bill Lukens' name on some of the documentation on the Tekwiki web site. I believe he was one of the major players in the 106 development.

(As a completely off-the-subject aside, the 140 color bar generator started out as a 067- test fixture intended to test vector scopes. I have some early front panels of same in my garage. Charlie, of course, fully intended to sell them as a product from the get-go but needed to pretend to be doing a cal fixture to get permission to develop it.)

In any case, I don't believe I drew the diagram on that page. At that time I used a template and my resistors had many fewer points. Further, all of the lettering is much better than I have ever been able to do. The only thing I recognize on that page that might be done my me is the 3.9K notation scribbled above R402.

Links

Documents Authored by Linley Gumm

Document Page Class Title Author(s) Year Refers to
Tekscope 1972 V4 N1 Jan 1972.pdf 2 Article A Microwave Spectrum Analyzer for the 7000-Series Oscilloscopes Linley Gumm • Larry Lockwood • Morris Engelson • Al Huegli 1972 7L12
Tekscope 1977 V9 N3.pdf 6 Article A High Performance Transportable Microwave Spectrum Analyzer Linley Gumm 1977 7L18

Products by Linley Gumm

Manufacturer Model Description Designers Introduced
Tektronix 7L12 1.8 GHz Spectrum Analyzer Morris Engelson • Linley Gumm • Gene Kauffman • Larry Lockwood • Gordon Long • Steve Morton • Paul Parks • Fred Telewski • Neal Broadbent • Jack Doyle • Al Huegli • Steve Skidmore • Leighton Whitsett • Judy Hanson • Robert Holmes • Carolyn Moore • Rena Randle 1971
Tektronix 7L18 18 (60) GHz Spectrum Analyzer Linley Gumm • Bob Bales • Russell Brown • George Maney • Carlos Beeck • James Wolf • Dave Shores • Philip Snow • Wesley Hayward • Jack Reynolds • Steve Morton • Don Kirkpatrick • Dennis Smith • Al Huegli 1978
Tektronix 492 21 GHz Spectrum Analyzer Larry Lockwood • Steve Morton • Linley Gumm • Robert Alm • Bob Bales • Carlos Beeck • Bill Benedict • Craig Bryant • Russell Brown • Wes Hayward • David Leatherwood • Gordon Long • Dave Morton • Bill Peterson • David Shores • Steve Skidmore • Dennis Smith • Phil Snow • Leighton Whitset • Norman Witt 1980

Components by Linley Gumm

Patents by Linley Gumm

Page Office Number Title Inventors Company Filing date Grant date
Patent US 5233418A US 5233418A CATV sweep system using a gated receiver Linley Gumm • Richard T. King Tektronix Inc 1993-08-03
Patent US 4410879A US 4410879A High resolution digital-to-analog converter Linley Gumm • Steven R. Morton Tektronix Inc 1980-10-31 1983-10-18
Patent US 4688253A US 4688253A L+R separation system Linley Gumm Tektronix Inc 1986-07-28 1987-08-18
Patent US 4728884A US 4728884A Infinite dynamic range phase detector Linley Gumm Tektronix Inc 1986-10-09 1988-03-01
Patent US 5068614A US 5068614A Swept frequency domain reflectometry enhancement Walter D. Fields • Linley Gumm Tektronix Inc 1990-11-05 1991-11-26
Patent US 5073822A US 5073822A In-service cable television measurements Linley Gumm • Bill Benedict Tektronix Inc 1990-11-19 1991-12-17
Patent US 5493209A US 5493209A Tunable trigger acquisition system and method for making in-service time-domain signal measurements Linley Gumm • Dana E. Whitlow Tektronix Inc 1993-10-20 1996-02-20
Patent US 5521532A US 5521532A Digital synthesizer controlled microwave frequency signal source Linley Gumm Tektronix Inc 1994-10-06 1996-05-28
Patent US 6307896B1 US 6307896B1 Instrumentation receiver for digitally modulated radio frequency signals Linley Gumm • Jeffrey D. Earls Tektronix Inc 1998-04-03 2001-10-23
Patent US 6246717B1 US 6246717B1 Measurement test set and method for in-service measurements of phase noise Xiaofen Chen • Linley Gumm • Dana E. Whitlow • Larry Lockwood Tektronix Inc 1998-11-03 2001-06-12
Patent US 6275523B1 US 6275523B1 In-service measurement of transmitter nonlinearities Xiaofen Chen • Linley Gumm • Thomas L. Kuntz Tektronix Inc 1998-11-03 2001-08-14
Patent US 6477198B1 US 6477198B1 Quality cause measurement display Linley Gumm Tektronix Inc 2000-05-01 2002-11-05
Patent US 6437578B1 US 6437578B1 Cable loss correction of distance to fault and time domain reflectometer measurements Linley Gumm Tektronix Inc 2000-11-14 2002-08-20
Patent US 6384784B1 US 6384784B1 Direction finder system using spread spectrum techniques Linley Gumm Tektronix Inc 2001-01-05 2002-05-07
Patent US 6384589B1 US 6384589B1 Reference frequency spur cancellation in synthesized measurement receivers Linley Gumm • Thomas L. Kuntz • Xiaofen Chen Tektronix Inc 2001-04-04 2002-05-07
Patent US 6472945B1 US 6472945B1 Operational amplifier oscillator Linley Gumm Tektronix Inc 2001-04-27 2002-10-29
Patent US 6608475B2 US 6608475B2 Network analyzer using time sequenced measurements Linley Gumm Tektronix Inc 2001-08-23 2003-08-19
Patent US 6701265B2 US 6701265B2 Calibration for vector network analyzer Thomas C. Hill • Xiaofen Chen • Soraya J. Matos • Leroy J. Willmann • Kyle L. Bernard • Linley Gumm Tektronix Inc 2002-03-05 2004-03-02
Patent US 6930563B2 US 6930563B2 Self-adjusting I-Q modulator system Linley Gumm Tektronix Inc 2003-04-18 2005-08-16
Patent US 6876261B2 US 6876261B2 Phase lock for synthesizer phase reference oscillator Linley Gumm Tektronix Inc 2003-04-21 2005-04-05
Patent US 6768434B1 US 6768434B1 High speed x/sine(x) correction circuit Linley Gumm Tektronix Inc 2003-05-15 2004-07-27
Patent US 7519330B2 US 7519330B2 Simultaneous ACLR measurement Linley Gumm Tektronix Inc 2004-03-08 2009-04-14


  • Sunset Building 81

    Sunset Building 81

Retrieved from "https://w140.com/tekwiki/index.php?title=Linley_Gumm&oldid=86750"