CVARS WA7UHD

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

ARRL special service club




Electronics Workshop - June 27, 2019

Time & Location:

Topics:
  1. "Hints and Hacks"
    • Harbor Freight Multimeter switch highlight
    • VHF Packet Radio Tones
  2. Dipole Antennas - Part 2
  3. Astron Power Supply Modification

Notes:
VHF Packet Radio Tones:
  1. Bell 202:
    1200/2200 Hz; Most hardware and software TNCs
  2. CCITT (ITU-T) V.23:
    1300/2100 Hz; Kantronics KPC-3+ family

Reference:
Antenna Modeling:
  1. "An Introduction to Antenna Modelling," Steve Nichols, G0KYA, available through ARRL.
  2. MMANA-GAL:
    https://hamsoft.ca/pages/mmana-gal.php
  3. EZNEC:
    http://www.eznec.com/
  4. 4nec2:
    https://www.qsl.net/4nec2/
  5. MININEC Pro:
    http://www.blackcatsystems.com/

Twelfth-Wave Matching Transformer::
  1. "Twelfth-Wave Transformers," The ARRL Handbook for Radio Communications 2018, Chapter 20, pg. 20.15
  2. Twelfth-Wave Matching Transformer Summary:
    https://www.cv.nrao.edu/~demerson/twelfth/twelfth.htm

Astron Power Supply:
  1. Astron product website:
    https://www.astroncorp.com/
  2. Schematics, Service and Modifications website:
    http://repeater-builder.com/astron/astron-index.html
  3. "Adding Variable Voltage and Current Adjustments":
    http://repeater-builder.com/astron/front-pots/front-pots.html

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