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* [[EMS-Rehberg Synthi-logik]]<ref name="retroz"/>
* [[EMS-Rehberg Synthi-logik]]<ref name="retroz"/>
=== Electronics magazine articles ===
=== Electronics magazine articles ===
* [[Wireless World Electronic sound synthesizer|Electronic Sound Synthesizer]], with D. W. Thomas, Wireless World, Aug to Oct 1973, [http://www.keith-snook.info/wireless-world-magazine/Wireless-World-1973/Electronic%20sound%20Synthesizer.pdf Keith Snook], [http://www.emusic-diy.org/Schematics/Synths Emusic DIY]
* [[Wireless World Electronic sound synthesizer|Electronic Sound Synthesizer]], with D. W. Thomas, Wireless World, Aug to Oct 1973, [http://www.keith-snook.info/wireless-world-magazine/Wireless-World-1973/Electronic%20sound%20Synthesizer.pdf Keith Snook], [http://www.emusic-diy.org/Schematics/Synths EmusicDIY], [https://worldradiohistory.com/UK/Wireless-World/70s/ World Radio History]
* Active filters, ETI, Jul to Sep 1977, [https://worldradiohistory.com/UK/Electronics-Today-UK/70s/ World Radio History]
* Active filters, ETI, Jul to Sep 1977, [https://worldradiohistory.com/UK/Electronics-Today-UK/70s/ World Radio History]
* Op amps, ETI, Feb to May 1978, [https://worldradiohistory.com/UK/Electronics-Today-UK/70s/ World Radio History]
* Op amps, ETI, Feb to May 1978, [https://worldradiohistory.com/UK/Electronics-Today-UK/70s/ World Radio History]
* Spectrum analyser, ETI, Jun 1978, [https://worldradiohistory.com/UK/Electronics-Today-UK/70s/ World Radio History]
* Spectrum analyser, ETI, Jun 1978, [https://worldradiohistory.com/UK/Electronics-Today-UK/70s/ World Radio History]
* Designing oscillators, ETI, Jul 1978, [https://worldradiohistory.com/UK/Electronics-Today-UK/70s/ World Radio History]
* Designing oscillators, ETI, Jul 1978, [https://worldradiohistory.com/UK/Electronics-Today-UK/70s/ World Radio History]
* Polyphonic keyboard, ETI, Jul 1978, [https://web.archive.org/web/20150406120939/http://www.spontis.se/pdf/arak.pdf CAG]
* Polyphonic keyboard, ETI, Jul 1978, [https://web.archive.org/web/20150406120939/http://www.spontis.se/pdf/arak.pdf CAG], [https://worldradiohistory.com/UK/Electronics-Today-UK/70s/ World Radio History]
* [[Powertran Transcendent 2000|Music Synthesiser]], ETI, Jul to Aug 1978, [https://web.archive.org/web/20160123231517/http://www.spontis.se/pdf/t2000.pdf CAG], [http://www.emusic-diy.org/Schematics/Synths Emusic DIY], [https://worldradiohistory.com/UK/Electronics-Today-UK/70s/ World Radio History]
* [[Powertran Transcendent 2000|Music Synthesiser]], ETI, Jul to Aug 1978, [https://web.archive.org/web/20160123231517/http://www.spontis.se/pdf/t2000.pdf CAG], [http://www.emusic-diy.org/Schematics/Synths EmusicDIY], [https://worldradiohistory.com/UK/Electronics-Today-UK/70s/ World Radio History]
* Ten 3080 circuits, ETI, Apr 1979
* Ten 3080 circuits, ETI, Apr 1979, [https://worldradiohistory.com/UK/Electronics-Today-UK/70s/ World Radio History]
* Electronic music, Hobby Electronics, May to Jun 1979
* Electronic music, Hobby Electronics, May to Jun 1979, [https://worldradiohistory.com/UK/Hobby-Electronics/ World Radio History]
* [[Powertran Transcendent DPX|Transcendent DPX]] (A String Thing), ETI, Aug to Oct 1979, [https://web.archive.org/web/20150405174129/http://www.spontis.se/pdf/eti_dpx.pdf CAG]
* [[Powertran Transcendent DPX|Transcendent DPX]] (A String Thing), ETI, Aug to Oct 1979, [https://web.archive.org/web/20150405174129/http://www.spontis.se/pdf/eti_dpx.pdf CAG], [https://worldradiohistory.com/UK/Electronics-Today-UK/70s/ World Radio History]
* Analogue delay lines, ETI, Nov 1979
* Analogue delay lines, ETI, Nov 1979, [https://worldradiohistory.com/UK/Electronics-Today-UK/70s/ World Radio History]
* Analogue switches, ETI, Apr 1980
* Analogue switches, ETI, Apr 1980, [https://worldradiohistory.com/UK/Electronics-Today-UK/80s/ World Radio History]
* [[ETI Black hole|The Black hole chorus machine]], ETI, May 1980, [https://web.archive.org/web/20150409040042/http://www.spontis.se/pdf/eti_bh.pdf CAG]
* [[ETI Black hole|The Black hole chorus machine)]], ETI, May 1980, [https://web.archive.org/web/20150409040042/http://www.spontis.se/pdf/eti_bh.pdf CAG], [https://worldradiohistory.com/UK/Electronics-Today-UK/80s/ World Radio History]
* Filter design, ETI, Jul 1980
* Filter design, ETI, Jul 1980, [https://worldradiohistory.com/UK/Electronics-Today-UK/80s/ World Radio History]
* Bandpass and beyond, ETI, Dec 1980
* Bandpass and beyond, ETI, Dec 1980, [https://worldradiohistory.com/UK/Electronics-Today-UK/80s/ World Radio History]
* [[Powertran Transcendent polysynth|Polysynth]], ETI, Dec 1980 to Mar 1981, [https://web.archive.org/web/20150408214235/http://www.spontis.se/pdf/etipoly.pdf CAG], [https://worldradiohistory.com/UK/Electronics-Today-UK/80s/ World Radio History]
* [[Powertran Transcendent polysynth|Polysynth]], ETI, Dec 1980 to Mar 1981, [https://web.archive.org/web/20150408214235/http://www.spontis.se/pdf/etipoly.pdf CAG], [https://worldradiohistory.com/UK/Electronics-Today-UK/80s/ World Radio History]
* Digital delay effects unit, E&MM, Feb to Mar 1982
* Digital delay effects unit, E&MM, Feb to Mar 1982, [http://www.muzines.co.uk/articles/digital-delay-effects-unit/3714 Muzines]
* Facts on DAC's and ADC's, ETI, Mar 1982
* Facts on DAC's and ADC's, ETI, Mar 1982, [https://worldradiohistory.com/UK/Electronics-Today-UK/80s/ World Radio History]
* Electromusic techniques, ETI, Apr to Jun 1982
* Electromusic techniques, ETI, Apr to Jun 1982, [https://worldradiohistory.com/UK/Electronics-Today-UK/80s/ World Radio History]
* Equaliser circuit design, ETI, Sep 1981
* Equaliser circuit design, ETI, Sep 1981, [https://worldradiohistory.com/UK/Electronics-Today-UK/80s/ World Radio History]
* Semi-professional mixer, Practical Electronics, Oct to Dec 1982, [https://web.archive.org/web/20150406121404/http://www.spontis.se/pdf/modmix.pdf CAG]
* Semi-professional mixer, Practical Electronics, Oct to Dec 1982, [https://web.archive.org/web/20150406121404/http://www.spontis.se/pdf/modmix.pdf CAG], [https://worldradiohistory.com/UK/Practical-Electronics/80s/ World Radio History]
* [[ETI Chorus&#47;flanger unit|Chorus/flanger unit]], ETI, Jan 1984, [https://web.archive.org/web/20150409161536/http://www.spontis.se/pdf/flanger.pdf CAG], [http://www.synthdiy.com/files/2005/flanger.pdf SynthDIY.com]
* [[ETI Chorus&#47;flanger unit|Chorus/flanger unit]], ETI, Jan 1984, [https://web.archive.org/web/20150409161536/http://www.spontis.se/pdf/flanger.pdf CAG], [http://www.synthdiy.com/files/2005/flanger.pdf SynthDIY.com], [https://worldradiohistory.com/UK/Electronics-Today-UK/80s/ World Radio History]
* Powertran MCS-1, with R Monkhouse and Paul Bird, E&MM, Oct 1984 to Mar 1985, [https://web.archive.org/web/20150410043541/http://www.spontis.se/pdf/emm_mcs1.pdf CAG], [http://www.muzines.co.uk/articles/powertran-mcs1/1473 Muzines]
* Powertran MCS-1, with R Monkhouse and Paul Bird, E&MM, Oct 1984 to Mar 1985, [https://web.archive.org/web/20150410043541/http://www.spontis.se/pdf/emm_mcs1.pdf CAG], [http://www.muzines.co.uk/articles/powertran-mcs1/1473 Muzines]
* Powertran BBC MIDI interface, with Jim Grant, E&MM, Apr 1985
* Powertran BBC MIDI interface, with Jim Grant, E&MM, Apr 1985, [http://www.muzines.co.uk/articles/powertran-bbc-midi-interface/1887 Muzines]
* Powertran BBC software (for Powertran MCS-1), with Jim Grant, E&MM, May 1985

== References ==
== References ==
{{reflist}}
{{reflist}}

Revision as of 22:55, 23 March 2022

Tim Orr in the London College of Furniture's 16-track music studio.

Tim Orr designed synthesizers for EMS Ltd., Akai and later synthesizer projects for Electronics Today International magazine, sold as kits by Powertran, he then went on to lecture on electronic instrument design at the London College of Furniture.[1][2][3]

Designs

EMS gear

Electronics magazine articles

References

  1. ^ Powetran advert, Wireless World, June 1981, p87
  2. ^ Vintage Synthesizers: Groundbreaking Instruments and Pioneering Designers of Electronic Music Synthesizers by Mark Vail, Backbeat Books, 2nd Revised edition, Jun. 2000, ISBN 0-87930-603-3, p. 61
  3. ^ The People, EMS: The Inside Story by Graham Hinton, 8 Aug 1998
  4. ^ a b All About EMS: Part 2 by Gordon Reid, Sound On Sound, Dec 2000

External links

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