-
http://www.pmillett.com/tecnical_books_online.htm
-
http://audiyofan.org/forum/viewtopic.php?f=4&t=7378
-
http://www.world-designs.co.uk/forum/archive/index.php/t-376.html
-
http://hackaday.com/2010/03/09/tube-clock-database
Projet d'ampli à tube en francais
http://www.projetg5.com/index.php
-
http://www.angelfire.com/electronic/funwithtubes/Amp-Phase.html
-
http://www.diyforums.org/MAX/MAXoverview.php
-
http://www.akh.se/tubes/eyes.htm
-
https://www.instructables.com/id/ILC1-18L-Clock