CVARS K7PG     

     CVARS    K7PG
  The Chehalis Valley
 Amateur Radio Society
A  501(c)(3) Non-profit

      ARRL special service club
 
 

Electronics Workshop - October 27, 2022

Time & Location:

Topics:
  1. LED Series Resistor
  2. Si4732 Broadcast AM/FM/SW/LW/RDS Radio
  3. Ferrites
  4. Azimuthal Map - Part 2
  5. Potpourri

Notes:
LED Series Resistor:
  1. "Kirchhoff's circuit laws":https://en.wikipedia.org/wiki/Kirchhoff%27s_circuit_laws
  2. Adafruit's "All About LEDs":https://www.mouser.com/datasheet/2/737/all-about-leds-932801.pdf
  3. "Resistor Guide : Resistor Values":https://eepower.com/resistor-guide/resistor-standards-and-codes/resistor-values/
Si4732 Broadcast AM/FM/SW/LW/RDS Radio
  1. "Si4732 Full Band Radio Receiver, Speaker and Antenna DIY Kit":https://www.ebay.com/itm/174715644038
  2. Skyworks short Si4732-A10 Data Sheet:https://www.skyworksinc.com/-/media/Skyworks/SL/documents/public/data-shorts/Si4732-A10-short.pdf
  3. mircemk's "DIY Si4732 LW,MW,SW,SSB Radio with 2.8 inch touch screen" on HACKADAY.IO:https://hackaday.io/project/182781-diy-si4732-lwmwswssb-radio-with-28-inch-touch
  4. Si4732 Receiver Kit:https://www.ebay.com/itm/174715644038
  5. Skyworks "Si47xx Evaluation Board User's Guide":https://www.skyworksinc.com/-/media/SkyWorks/SL/documents/public/user-guides/Si47xxEVB.pdf
Ferrites
  1. H. Ward Silver's "All About Ferrite" in Nuts and Volts archive:https://www.nutsvolts.com/magazine/article/July2015_HamWorkbench
  2. Ferrite Manufacturers:
  3. Balun Designs (Baluns, Ununs, and kits):https://www.balundesigns.com/
  4. The qrptech discussion group on Groups.io has a "Toroid Ferrite Mix" topic:https://groups.io/g/qrptech/messages
Azimuthal Map - Part 2
  1. Great Circle Maps by SM3GS:

Potpourri:
Measuring SWR:
  1. Lewis McCoy "The Monimatch" (QST October 1956 pg 11-14)
  2. Lewis McCoy "The Monimatch Mark II" (QST February 1957 pg 38-39)
  3. Lewis McCoy "The Millimatch" (QST August 1967 pg 44-46)
  4. "More Notes on Directional Couplers for HF - the Monimatch":https://k6jca.blogspot.com/2015/02/more-notes-on-directional-couplers-for_3.html
  5. "A Modern Directional Power/SWR Meter":http://www.arrl.org/files/file/Product%20Notes/2012%20Handbook/KAUNE.pdf

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