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

Electronics Workshop - January 29, 2026

Time & Location:

Topics:
  1. RF Power Meters
  2. Simpson 260 Volt-Ohm-Milliammeter

  3. Potpourri

Notes:
RF Power Meters:
  1. Bird 4480A Digital Wattmeter:
    https://birdrf.com/rf-measurement/wattmeters/digital-wattmeters/4480A
  2. Bird 43 Wattmeter:
    https://birdrf.com/rf-measurement/wattmeters/cw-wattmeters/43
  3. Bird RPK43-3 Line Section Assembly: https://btgstore.com/rpliseas.html
  4. Bird 43 Schematic:
    https://birdrf.com/hubfs/learning-center/manual-files/920-43_REV%20L.pdf
  5. "Photo Tour of a Bird Wattmeter Element":
    https://www.repeater-builder.com/projects/bird-element-tour/bird-element-tour.html
  6. Heathkit AM-2 Reflected Power & SWR Bridge":
    https://www.qsl.net/wb4bxw/manuals-drawings/Heathkit/AM-2_reflected_power_meter/AM-2_Reflected_Power_Meter.pdf
  7. "More Notes on Directional Couplers for HF":
    https://k6jca.blogspot.com/2015/02/more-notes-on-directional-couplers-for_3.html
  8. PAL KW-1 Watts/SWR:
    http://www.firestik.com/Instl-Art/swr_kw1.pdf
  9. Palomar Model 500 Watt-SWR Meter and AM Monitor:
    http://bee.mif.pg.gda.pl/ciasteczkowypotwor/%23ham_radio/Other/ACC_instrument/Palomar_Electronic_500_SWR_meter_user.pdf
  10. RS Micronta 21-522 Power/Modulation/SWR Tester:
    https://www.qsl.net/kb7tbt/manuals/radioshack/Micronta-power-mod-SWR21-522.pdf
  11. "How to Build and Use a VHF Wattmeter (QST December 1987 pp 15-19)":
    https://www.qsl.net/on7eq/pdf/VHF_SWR_meter.pdf
Simpson 260 Volt-Ohm-Milliammeter:
  1. Simpson 260 - 6:https://www.simpson260.com/260-6/simpson_260-6.htm
  2. "What's Wrong With This Simpson 260 - 6 VOM?":
    https://youtu.be/7IG06jAWVKg
  3. "Let's Make It Work! Simpson 260 - 6 Repair And Calibration?":
    https://youtu.be/p5wgbX419aE

Potpourri
:

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