ARRL:n päämajan videot, YouTube

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https://www.youtube.com/@ARRLHQ/videos

David J. Casler https://wireless2.fcc.gov/UlsApp/UlsSea ... Key=531565 , kolmannen luokan radioamatööritutkinto

https://www.youtube.com/watch?v=bovJEGIunNg
Dave Casler Technician License Series: T01 How to Get Your Ham Radio License 2022-2026

https://www.youtube.com/watch?v=Q_uolF-eiEQ
Dave Casler Technician License Series: T02 Chapter 1 2022-2026

https://www.youtube.com/watch?v=y1SpGaCJA2E
Dave Casler Technician License Series: T03 Radio Signals and Waves 2022-2026

https://www.youtube.com/watch?v=YGNlrrY ... cG&index=4
Dave Casler Technician License Series: T04 Radio Equipment Basics 2022-2026

https://www.youtube.com/watch?v=fdpfcnH3bDQ
Dave Casler Technician License Series: T05 Electricity, Ohm's Law Explained 2022-2026

https://www.youtube.com/watch?v=a2XGOMOWFjk
Dave Casler Technician License Series: T06 Components and Units 2022-2026

https://www.youtube.com/watch?v=cJuFQpBh2uU
Dave Casler Technician License Series: T07 Radio Circuits: Oscillator, Amplifiers, Modulator, Mixers

https://www.youtube.com/watch?v=ibXHH8xJCug
Dave Casler Technician License Series: T08 Propagation

https://www.youtube.com/watch?v=lz-0RoBXMho
Dave Casler Technician License Series: T09 Antenna and Radio Wave Basics 2022-2026

https://www.youtube.com/watch?v=iNxVShY ... x=10&t=12s
Dave Casler Technician License Series: T10 Feed Lines and SWR 2022-2026

https://www.youtube.com/watch?v=dsnuGrEkwLU
Dave Casler Technician License Series: T11 Section 4.4 Practical Antenna Systems

https://www.youtube.com/watch?v=V2mPcPdDkn0
Dave Casler Technician License Series: T12 Modulation

https://www.youtube.com/watch?v=h5YoGBg ... G&index=13
Dave Casler Technician License Series: T13 Transmitters and Receivers 2022-2026

https://www.youtube.com/watch?v=jTF6kr8Lm58
Dave Casler Technician License Series: T14 Digital Communications

https://www.youtube.com/watch?v=RW5W1l54GBg
Dave Casler Technician License Series: T15 Section 5.4 Power Supplies and Batteries 2022-2026

https://www.youtube.com/watch?v=WTwMWrQ7dGo
Dave Casler Technician License Series: T16 Section 6.1 Band Plans 2022-2026

https://www.youtube.com/watch?v=QuIyrNi-Ah0
Dave Casler Technician License Series: T17 Section 6.2 Making Contacts 2022-2026

https://www.youtube.com/watch?v=4DKpV-3ZNDs
Dave Casler Technician License Series: T18 Section 6.3 Using Repeaters 2022-2026

https://www.youtube.com/watch?v=HypCYN7FJU8
Dave Casler Technician License Series: T19 Section 6.4 Nets 2022-2026

https://www.youtube.com/watch?v=gzKrS5WGCqg
Dave Casler Technician License Series: T20 Section 6.5 Communications for Public Service 2022-2026

https://www.youtube.com/watch?v=sDxHecdv2Kg
Dave Casler Technician License Series: T21 Section 6.6 Satellite Operating 2022-2026

https://www.youtube.com/watch?v=UnqzJgzcE3c
Dave Casler Technician License Series: T22 Section 7.1 Licensing Terms

https://www.youtube.com/watch?v=Uf82JZKf208
Dave Casler Technician License Series: T23 Section 7.2 Bands and Privileges 2022-2026

https://www.youtube.com/watch?v=maCs17kZPZY
Dave Casler Technician License Series: T24 Section 7.3 International Rules 2022-2026

https://www.youtube.com/watch?v=k2TB0hY8tGo
Dave Casler Technician License Series: T25 Section 7.4 Call Signs 2022-2026

https://www.youtube.com/watch?v=U0eukwu3oWM
Dave Casler Technician License Series: T26 Section 8.1 Control Operators

https://www.youtube.com/watch?v=n49Dy7n5ucg
Dave Casler Technician License Series: T27 Section 8.2 Identification 2022-2026

https://www.youtube.com/watch?v=MmfOL_d5kf8
Dave Casler Technician License Series: T28 Section 8.3 Interference 2022-2026

https://www.youtube.com/watch?v=UukeI2_ddgs
Dave Casler Technician License Series: T29 Section 8.4 Third-Party Communications 2022-2026

https://www.youtube.com/watch?v=rJq5i2IXDr4
Dave Casler Technician License Series: T30 Section 8.5 Remote and Automatic Operation 2022-2026

https://www.youtube.com/watch?v=4imERNuhd_s
Dave Casler Technician License Series: T31 Section 8.6 Prohibited Transmissions

https://www.youtube.com/watch?v=um7i0q-kolg
Dave Casler Technician License Series: T32 Section 9.1 Electrical Safety 2022-2026

Dave Casler Technician License Series: T33 Section 9.2 Managing RF in Your Station
https://www.youtube.com/watch?v=4NPx2CDzmv0

https://www.youtube.com/watch?v=AquCQ4Rq6l8
Dave Casler Technician License Series: T34 Section 9.3 RF Interference 2022-2026

https://www.youtube.com/watch?v=3-tnC6lLmsU
Dave Casler Technician License Series: T35 Section 9.4 RF Exposure 2022-2026

https://www.youtube.com/watch?v=PC7GD58yCqg
Dave Casler Technician License Series: T36 Section 9.5 Mechanical Safety

https://www.youtube.com/watch?v=Xv6_xKYtzfk
Dave Casler Technician License Series: T37 Exam Review 2022-2026