Amateur radio exam training : Transformers 

Amateur Radio exam training (France) - Transformers (English subtitles are available)
You can suggest topics for next videos: forms.gle/VyM6...
Those short videos are dedicated to students preparing the ham radio exam in France. They cover basic topics the more repeated during the training sessions at the radio-club.
A new website is available for an ordered view of the videos and some exercises. This is only in french for now.
f6kuq.r-e-f.org...
In this video :
Formulas to know about transformers with several exercises to do while watching the video (use Pause):
Les formules à connaitre concernant les transformateurs avec plusieurs exemples d'exercices à faire en regardant la vidéo (mettez en pause):
00:17 the base schematics
01:45 the formula
04:00 exercise
05:00 exercise
06:20 exercise
07:45 notion of yield
08:37 exercise
09:14 exercise
10:50 usage as impedance transformer
11:48 exercise
12:42 exercise
14:13 summary of what to know
For any remark, please use the email address shown at the end of each video. (specially if you want more in english...)
---- About Us ----
F6KUQ is the radio club in Cestas near Bordeaux, France. Trainings for amateur radio exam have been proposed for more that 20 years. They take place every week (except holidays and lockdown periods). Trainings are customized to you. You can arrive at any time during the year. Because of covid constraints, this is being moved to the web too. This will take some time.
Web: www.f6kuq.org
Facebook: / radioclub.cestas
Twitter: / radioclubcestas
Exam training: f6kuq.r-e-f.org...