Pentode (Danish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Pentode" in Danish language version.

refsWebsite

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3books.google.com

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books.google.com

The Navy Electricity and Electronics Training Series, Module 06: Introduction to Electronic Emission, Tubes, and Power Supplies. United States Navy. 1998. s. 13. ISBN 132966776X. (Webside ikke længere tilgængelig)
Whitaker, Jerry (2016). Power Vacuum Tubes Handbook, 3rd Edition. CRC Press. s. 87. ISBN 1439850658.
Solymar, Lazlo (2012). Modern Physical Electronics. Springer Science and Business Media. s. 8. ISBN 9401165076.

google.es

books.google.es

Grayson Evans. Hollow-State Design 2nd Edition. Lulu.com. s. 45–. ISBN 978-1-300-96521-3.

r-type.org

r-type.org: "The Mullard EF36, EF37 and EF37A" at the National Valve Museum