Electronics Workshop - June 29, 2017
Time & Location:
- 7:00 PM
- Fire District 6 Training Room, 2123 Jackson Highway, Chehalis, WA
Topics:
- General Exam Antenna Questions (G9B)
- Re-purposing TV Antennas
- Ferrite Cores
- (Arduino) Frequency Meter
Notes:
- Lissajous frequency ratio: fY / fX = horizontal line crossings / vertical line crossings
- If pattern scrolls to left, input frequency is higher than trigger frequency;
If pattern scrolls to right, input frequency is lower than trigger frequency.
Reference:
- General Exam Question Pool: http://ncvec.org/page.php?id=364
- “Recycling TV Antennas for 2-Meter Use”:
http://www.arrl.org/files/file/Technology/tis/info/pdf/9611034.pdf
- Ferrite Cores: http://www.Palomar-Engineers.com/
http://www.fair-rite.com/
- Lissajous Figures:
https://www.electrical4u.com/lissajous-patterns-of-cro/
http://www.electronixandmore.com/projects/scopepong/index.html
