ARC active projects

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This is a list of currently active projects by the Amateur Radio Club.

For a project to be considered active, either we currently have (some?) parts available to build the project at the next meeting, or some club member has expressed interest in the project this semester either in a meeting or in discord.

Some projects may be at design stage, parts acquisition, or build stage.

Personal projects[edit]

These are projects intended for an individual to complete and take the result home. Some of these are completed designs for which we have parts and can build at any meeting. IF you want to build one of these, please notify us ahead of time (in discord or in previous meeting) so we can make sure we have enough parts for everyone who wants to build one.

If you would like to build one of the antennas that we don't have a selected complete design, bring it up at the meeting and we can discuss options and refine the selection.

Special antennas[edit]

We may have some parts for these, research to select or model a specific design is needed.

quadrafiliar helical for 136Mhz weather sattelites
antenna built, working on software setup
flat patch antennas
pick a design; we have some FR4 that can be milled
cylindrical patch antenna
needs research, fabricate (we have papers on this, needs to be modeled)
magnetically shielded small loop
can build for any frequency, use a section of coax and a connector. Used for direction finding

Possible HF antennas[edit]

We have some parts for these.

type parts availability
windom wire yes
balun no
double bazooka coax some
wire yes
feed mount fabricate
small loop pipe or coax maybe
10kv capacitor fabricate
end fed with loading coil or balun wire yes
9:1 balun? no, fabricate
coil: wire + form fabricate

UHF/VHF[edit]

The number indicates how many antennas we have parts for.

Antenna 2m 70cm
tape measure yagi 3 N/A
wire J-pole 4-5 (dual band)
copper pipe J-pole 1-2 (partial)
moxon some partial
small loop for receving yes


Bill of materials
part material qty needed
2m Tape measure yagi
tape measure 3 elements (length?)
boom 3/4" pvc pipe length?
director mount T connector 1
driven, reflector mount cross connector 2
driven attachment #20 hose clamp 2
director, reflector attachment short screws 2-4
hair pin match 12g wire 5"
feed and termination coax+connector 1
wire J-pole
radiator RG75 ~1m
matching section ladder line ~ 1/4 wl (calculate)
feed line rg58? + connector 1
optional structural support heat shrink 1"
70cm wire moxon
elements wire length?
spacers 3d print 2
feed mount 3d print 1
feed line rg58?+connector 1
70cm tape moxon
mounting board coardboard (size?)
elements foil tape (length)
feed point panel mount bnc? 1
2m wire moxon
elements 6G or 8G wire (length?)
spacers 3d print 2
feed mount 3d print 1
feed line rg58?+connector 1
2m pipe moxon
elements copper pipe (length?)
connectors elbows 4
feed spacer pvc? short length?
feed mount bottle cap? 1
feed pont BNC through mount? -
2m pipe J-pole
base (optional) copper pipe any
elements copper pipe (length?)
connectors copper elbow 1
copper T 1
insulating mount plate fabricate 1
feed point BNC or so239 panel mount 1
feed attachment short wires ~2"
folding connectors (optional) copper coupler 2
folding attachment (optional) bungee cord 1.5m
bungee attachment (optional) endcap 2
eye hook 2

inventory[edit]

Parts available (inventory incomplete)

part qty available
tape measure 3 spools
3/4" pvc pipe ends
3/4 T connector 0
3/4 cross connector 0
1/2" self piercing screws box of 100
#20 hose clamp 1
12 gauge zip cord loose (length?)
RG58 coax with bnc-M termination 0
RG58 bmc-M crimp ends 3?
RG58 loose length?
RG75 spool
wide flat short scrap wire box
left over precut J-pole and moxon copper pipe misc
mil spec WD1A phone zipline for HF antennas 0.5km spool
copper or aluminum foil adhesive tape roll
4.13mm solid copper wire
3.3mm solid copper wire

Group projects[edit]

These are group projects that could result in a hardware or software result that the club will retain.

If you want to participate in any of these, please let us know at a meeting or in discord!!

Active projects[edit]

Partially complete projects[edit]

major projects[edit]

  • Brainstorming ideas for portable HF antennas that don't involve trees
    • HF loaded vertical monopole
  • Meshtastic projects
    • currently testing coverage and picking installation locations
    • possible future mqtt or igate gateway
    • selecting nodes and building BOM for group purchase
    • possible interface to telemetry projects (FM repeater, weather station, SAME relay, TDoA, listed separately here)
  • SDR base software for future projects
  • Weather projects
    • wefax reception
    • weather satellite reception
    • weather station (brainstorming still, and looking for sponsors)

minor projects[edit]

  • Put a banner in the atrium
  • Create a new slide for the CECS tvs
  • Advertise on the engineering TVs
  • Catalog all club owned antennas (move this to its own page)
    • metadata: name, frequency range, typical SWR, location, feed line, picture(s)
    • portable and loose antennas
      • Diamond monopole
      • Diamond discone
      • Eagle
      • Iron horse + outbacker
      • hamsticks
      • windom(s)
      • B&W?
    • Roof antennas
      • Super J
      • windom
      • tower: 70cm yagi, 2m yagi, 900mhz yagi??

proposed projects[edit]

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