Editing Superheterodyne receiver (section)

==References==

{{reflist|refs=
<ref name="Howarth_2017">{{cite book |author-last=Howarth |author-first=Richard J. |title=Dictionary of Mathematical Geosciences: With Historical Notes |date=2017-05-27 |publisher=Springer |isbn=978-3-319-57315-1 |page=12 |url=https://books.google.com/books?id=MNwlDwAAQBAJ&pg=PA12 |access-date=2017-10-22}}</ref>
<ref name="Klooster_2009">{{cite book |author-last=Klooster |author-first=John W. |title=Icons of Invention: The Makers of the Modern World from Gutenberg to Gates |date=2009 |publisher=ABC-CLIO |isbn=978-0-313-34743-6 |page=414 |url=https://books.google.com/books?id=WKuG-VIwID8C&pg=PA414 |access-date=2017-10-22}}</ref>
<ref name="Koster_2016">{{cite web |title=Radio Lucien Lévy |date=2016-12-03 |author-last=Koster |author-first=John |work=Vintage Radio Web |url=http://www.vintageradio.nl/menu/radio_l_l__engels.htm |access-date=2017-10-22}}</ref>
<ref name="Bussey_1990">{{cite book |author-last=Bussey |author-first=Gorden |date=1990 |title=Wireless: the crucial decade - History of the British wireless industry 1924–34 |publisher=Peter Peregrinus Ltd. / [[Institution of Electrical Engineers]] |publication-place=London, UK |volume=13 |series=IEE History of Technology Series |isbn=0-86341-188-6 |page=78 |url=https://books.google.com/books?id=QJzDsSuaqU4C&pg=PA78 |access-date=2021-07-11 |url-status=live |archive-url=https://web.archive.org/web/20210711072729/https://books.google.de/books?id=QJzDsSuaqU4C&pg=PA78&lpg=PA78&ots=D8X5i8YOP-&focus=viewport&vq=30+kc%2Fs&dq=Wireless+-+the+crucial+decade+1924%25E2%2580%25931934&hl=de |archive-date=2021-07-11}} (136 pages)</ref>
<ref name="Malanowski_2011">{{cite book |author-last=Malanowski |author-first=Gregory |title=The Race for Wireless: How Radio Was Invented (or Discovered?) |publisher=[[AuthorHouse]]|date=2011 |pages=69 |url=https://books.google.com/books?id=IAjtEeVtXqAC&q=superheterodyne&pg=PA69 |isbn=978-1-46343750-3}}</ref>
<ref name="luxor">{{cite web |url=http://www.astrosurf.com/luxorion/qsl-ham-history-landmarks.htm |title=The History of Amateur Radio |publisher=Luxorion |access-date=2011-01-19}}</ref>
<ref name="Carr_2002">{{cite book |author-first=Joseph J. |author-last=Carr |title=RF Components and Circuits |publisher=Newnes |date=2002 |isbn=978-0-7506-4844-8 |chapter=Chapter 3}}</ref>
<ref name="Leutz_1922">{{cite journal |author-last=Leutz |author-first=C. R. |title=Notes on a Super-Heterodyne |volume=VI |issue=5 |pages=11–14 [11] |date=December 1922 |journal=[[QST]] |publisher=[[American Radio Relay League]] |location=Hartford, CT, USA |url=https://books.google.com/books?id=z80_AQAAIAAJ&pg=RA3-PA10}}</ref>
<ref name="Katz">{{cite web |author-last=Katz |author-first=Eugenii |title=Edwin Howard Armstrong |work=History of electrochemistry, electricity, and electronics |publisher=Eugenii Katz homepage, Hebrew Univ. of Jerusalem |url=http://www.geocities.com/neveyaakov/electro_science/armstrong.html |access-date=2008-05-10 |archive-url=https://web.archive.org/web/20091022120609/http://geocities.com/neveyaakov/electro_science/armstrong.html |archive-date=2009-10-22}}</ref>
<ref name="Sarkar_2006">{{cite book |author-first1=Tapan K. |author-last1=Sarkar |author-first2=Robert J. |author-last2=Mailloux |author-first3=Arthur A. |author-last3=Oliner |author-first4=Magdalena |author-last4=Salazar-Palma|author4-link=Magdalena Salazar Palma |author-first5=Dipak L. |author-last5=Sengupta |title=History of Wireless |publisher=[[Wiley (publisher)|John Wiley and Sons]] |date=2006 |isbn=0-471-71814-9 |page=110?|author-link1=Tapan Sarkar|author-link3=Arthur A. Oliner}}</ref>
<ref name="Hagen_1996">{{cite book |url=https://books.google.com/books?id=QtJ5tNdlyYAC&q=radio+local+oscillator+tuning+varicap&pg=PA58 |title=Radio-frequency electronics: circuits and applications |author-first=Jon B. |author-last=Hagen |page=58, l. 12 |date=1996-11-13 |publisher=[[Cambridge University Press]] |series=Technology & Engineering |isbn=978-0-52155356-8 |access-date=2011-01-17}}</ref>
<ref name="AOE_2006">{{cite book |url=https://books.google.com/books?id=bkOMDgwFA28C&pg=PA886 |title=The art of electronics |pages=886 |publisher=[[Cambridge University Press]] |date=2006 |isbn=978-0-52137095-0 |access-date=2011-01-17}}</ref>
<ref name="Terman_1943">{{cite book |author-first=Frederick Emmons |author-last=Terman |title=Radio Engineers' Handbook |date=1943 |publisher=[[McGraw Hill]] |location=New York, USA |pages=649&ndash;652}}. (NB. Describes design procedure for tracking with a pad capacitor in the Chebyshev sense.)</ref>
<ref name="Rohde-Bucher_1988">{{cite book |author-first1=Ulrich L. |author-last1=Rohde |author-first2=T. T. N. |author-last2=Bucher |title=Communications Receivers: Principles & Design |date=1988 |location=New York, USA |publisher=[[McGraw Hill]] |isbn=0-07-053570-1 |pages=44–55, 155–164}}. (NB. Discusses frequency tracking, image rejection and includes an RF filter design that puts transmission zeros at both the local oscillator frequency and the unwanted image frequency.)</ref>
<ref name="Langford-Smith_1940">{{cite book |title=Radiotron Designer's Handbook |editor-first=Fritz |editor-last=Langford-Smith |editor-link=Fritz Langford-Smith |edition=4th impression, 3rd |publisher=Wireless Press for [[AWA Technology Services|AWA]] / [[RCA]] |publication-place=Sydney, Australia / Harrison, New Jersey, USA |date=November 1941 |orig-date=1940 |page=102 |url=https://pearl-hifi.com/06_Lit_Archive/02_PEARL_Arch/Vol_16/Sec_51/4394_Radiotron_Designers_Handbook_3rd_Ed.pdf |access-date=2021-07-10 |url-status=live |archive-url=https://web.archive.org/web/20210203003154/https://www.pearl-hifi.com/06_Lit_Archive/02_PEARL_Arch/Vol_16/Sec_51/4394_Radiotron_Designers_Handbook_3rd_Ed.pdf |archive-date=2021-02-03}} (352 pages) (Also published as ''Radio Designer's Handbook''. London: Wireless World, 1940.)</ref>
<ref name="TT">{{cite web |url=http://www.qsl.net/wd4nka/TEXTS/REGENf~1.HTM |title=A Three Tube Regenerodyne Receiver |access-date=2018-01-27}}</ref>
<ref name="QSL">{{cite web |url=http://www.qsl.net/va3iul/Homebrew_RF_Circuit_Design_Ideas/Crystal_Filter_Types.gif |title=Crystal filter types |publisher=QSL RF Circuit Design Ideas |access-date=2011-01-17}}</ref>
<ref name="AMDEM">{{cite web |url=http://bc.inter.edu/facultad/rflores/ELEN4360/Labs/Com1_Lab3.pdf |title=Reception of Amplitude Modulated Signals - AM Demodulation |publisher=BC Internet education |date=2007-06-14 |access-date=2011-01-17}}</ref>
<ref name="TSCM">{{cite book |url=http://www.dbugman.com/handbook/tscmh5.html |title=Basic Radio Theory |publisher=TSCM Handbook |chapter=Chapter 5 |access-date=2011-01-17}}</ref>
<ref name="Kasperkovitz_2002">{{cite web |url=http://www.freepatentsonline.com/7227912.html |title=United States Patent 7227912 ''Receiver with mirror frequency suppression'' |author-first=Wolfdietrich Georg |author-last=Kasperkovitz |date=2007 |orig-date=2002}}</ref>
<ref name="Wright_1987">{{cite book |author-first=Peter |author-last=Wright |title=[[Spycatcher|Spycatcher: The Candid Autobiography of a Senior Intelligence Officer]] |date=1987 |publisher=[[Penguin Viking]] |isbn=0-670-82055-5}}</ref>
}}