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From the cover
of The Audio Adventure magazine, February 1996.
When Jan
Didden visited in October 2010 he interviewed me about my involvement with
audio before, during and after my 37 year career in R&D of Microwave and RF
Test Equipment at Hewlett Packard Co. (now Agilent) in California. The interview was published in the
Juli 2011 issue of AudioXpress magazine.
At AXPONA-Atlanta in 2011 I was interviewed by vimeo about
ORION-4.
A little bit about work, fun and life ...
| Work
/ Fun |
Hewlett-Packard Co., Palo Alto and Santa Rosa, California, '61-'98
(R&D Design Engineer, Project Mgr., Section Mgr., Senior Engineer)
Siemens, Zentrallabor, Muenchen, Germany, '61
Telefunken, Hannover, Germany, '57 |
| Major
Projects / Designs |
8566
Microwave Spectrum Analyzer, 100Hz - 22GHz, '78
8554 RF Spectrum Analyzer
8405 RF Vector Voltmeter
8546 EMC Analyzer
85650 Quasi-Peak Adapter
85685 RF Preselector |
| EMC
Standards Development |
ANSI
C63.1
IEC/CISPR SC/A, Publication 16
'82-'00 |
| Education |
Ongoing
...
Stanford University, EE, '62-'64
TH Darmstadt, Germany, Dipl. Ing. Elektrotechnik, '55-'61
Abitur, Kant Gymnasium, Bad Oeynhausen, '55
Radio Amateur License DJ1SX (diy 2-m rig), '51 |
| Audio
Fun /
Work |
Linkwitz
Lab, consulting/sharing, '99-present
Phoenix 3/2000 *** Thor 7/2001 *** Orion 9/2002 *** Pluto 4/2005 *** Pluto+
7/2006 *** Orion++ 1/2007 *** Pluto2 5/2008 *** Orion3 7/2010 *** Orion4
4/2011 *** LX521 10/2012 ***
Audio
Artistry, VP of Engineering, '94-'99
(Vivaldi, Dvorak, Beethoven, - Elite, - Grand Loudspeaker Systems)
G-Jobs with colleagues at Hewlett-Packard, '62-'94
(FM tuners, stereo decoders, pre- and power amplifiers, equalization of
commercial speakers & headphones, passive crossover box speakers,
active crossover box and open baffle speakers) |
| Fun |
Reading, digital photography,
listening to recorded music, live music,
audio design, recording,
traveling, windsurfing, downhill skiing, hiking, |
| Home
front |
Born
'35, Bad Oeynhausen, Germany
Father: Oeffentlich bestellter Vermessungsingenieur (surveyor); Mother:
School teacher's daughter; Brother: 8 years older
WW2 and post-war Germany from a young person's perspective, '39-'48
Lutheran Confirmation (but serious doubts about religion), '49
Married,
'61 (my wife's assessment of a loudspeaker's sound and appearance is
important to me)
Working at HP in California for a 2 year cultural experience, '61
Involvement with New Age groups ('63+) and challenging R&D work at HP
resulted in permanent stay
Daughter in '62; Son in '65; Granddaughters, '99, '04, '05 |
| Spiritual
search |
Jesus as Teacher discussion
groups - Sequoia Seminar - LSD - Creative Initiative - Beyond War -
Eckhart Tolle - Adyashanti - Tony Parsons |
B E I N G A L I V
E
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Biography for invited talk "Finding
the Prototype for Stereo Loudspeakers",
AES 51st Conference on Loudspeakers and Headphones, Helsinki, 2013
| Siegfried Linkwitz
April 2013 |
Since 1999 I have been adding information to the
LINKWITZ LAB website to educate about loudspeaker design, sound
reproduction and recording. I provide detailed plans for DIY construction
of state-of-the-art dipole and monopole loudspeakers using active
electronics. The speakers are optimized for operation in reverberant
domestic spaces.
After retirement from Hewlett-Packard Co. (now
Agilent) in 1998 I continued to pursue my life-long interests in audio,
having designed between 1994 and 1999 a line of dipole loudspeakers with
moving coil drive units for Audio Artistry. While at HP I developed the
"Linkwitz Transform" circuit and earlier, in 1975, the
"Linkwitz-Riley Crossover" filters out of a shared audio hobby
with Russ Riley.
I worked for 37 years in Research & Development
at HP, on state-of-the-art electronic test equipment, such as microwave
spectrum analyzers, network analyzers and EMI receivers. I traveled,
teaching HP Seminars on test and measurement in the frequency range from
10 kHz to 20 GHz. During my last 18 years at HP I also participated in
national and international standards development for Electromagnetic
Compatibility Test Instrumentation through ANSI and IEC/CISPR 16.
I came to the US in 1961 with my wife Eike, after
having received the Diplom Ingenieur degree in Electrical Engineering from
Darmstadt Technical University in Germany. I continued my education with
postgraduate studies at Stanford University while working at HP in Palo
Alto. We have a daughter, a son and three grandchildren. |
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