CVARS WA7UHD

CVARS
The Chehalis Valley
Amateur Radio Society
WA7UHD
A 501(c)(3) Corporation

ARRL special service club




Electronics Workshop - October 24, 2019

Time & Location:

Topics:
  1. Hints & Hacks
    • Impedance Matching
    • Breakdown Voltage
  2. Super Capacitors
  3. QRP Guys
  4. Battery Backup

Notes:
Super Capacitors:
  1. Range: 1 to 3,000 Farads
  2. Manufacturers include: AVX Corp, Eaton Corp, Ioxus Inc, KEMET Corp, Maxwell Technologies, Nichicon, Panasonic, Vishau Intertechnology
  3. AVX Datasheets:datasheets.avx.com/AVX-SCC.pdf(single cell units) &datasheets.avx.com/AVX-SCM.pdf(multi-cell units)
QRP Guys:
  1. A $40, crystal controlled, 20/ 30/ 40 meter, FT8, 3.00" x 3.12", QRP transceiver kit.
  2. WSJT-X supported protocols: FT4, FT8, JT4, JT9, JT65, QRA64, ISCAT, MSK144, and WSPR.
  3. Coordinate computer clock:www.thinkman.com/dimension4/download.htm
  4. Check computer clock accuracy:time.is
Battery Backup:
  1. West Mountain Radio PWRgate:www.westmountainradio.com/dc_power.php
  2. KI0BK Low Loss PWRgate:ki0bk.no-ip.com/~pwrgate/LLPG/Site/LLPG.html
  3. Chunzehui Electronics-Salon CZH-LABS:czh-labs.com/u_file/1810/file/cdaba80a22.pdf

Reference:
Impedance Matching:
  1. "About ... Impedance-Matching ... Circuits," H. Ward Silver (N0AX), QST, October 2019, pg. 43-46.
  2. "About ... Impedance-Matching ... with Tranmission lines," H. Ward Silver (N0AX), QST, November 2019, pg. 42-45.
Smith Chart:
  1. "Smith Chart Fun," QST Hands On Radio Experiments #59, #60, and #61,www.arrl.org/hands-on-radio
  2. Print free graph paper, including Smith Charts,www.printfreegraphpaper.com
Breakdown Voltage:
  1. Paschen's Law, en.wikipedia.org/wiki/Paschen's_law
Super Capacitors:
  1. "Super Capacitors," Irwin Math (WA2NDM), CQ, May 2019, pg. 34-35,www.cq-amateur-radio.com
QRP Guys:
  1. QRP Digital Transceiver Kit,qrpguys.com/digital-transceiver
  2. WSJT-X software,physics.princeton.edu/pulsar/K1JT/wsjtx.html
Battery Backup:
  1. UPS configurations:www.electrical4u.com/ups-uninterruptible-power-supply
  2. LTC4353 12V ideal diode-OR integrated circuit:www.analog.com/media/en/technical-documentation/data-sheets/4353f.pdf
  3. UC2906 sealed lead-acid battery charger integrated circuit:www.ti.com/lit/ds/slus186c/slus186c.pdf

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