SPARC Elmer Night: 2025-07-15

We discussed meshtastic as always. I’ve been seeing more nodes, especially in York.

I re-soldered and terminated my small 1:1 chokes, since the ends had ripped off on last activation.

sparc  elmer 

US-1418

When activating US-1418, Sam Lewis, I accidentally split the activation across 0000 UTC. Fortunately, I still got enough for the second day. I found some of my chokes broken, so swapped cable around a bit. I threw the 40M EFHW into a tree, and got 12 contacts, on FT8, on 15M and 40M.

71-ft EFRW

I went back to my favorite 71-ft EFRW for the home antenna wire. The EFHW was requiring tuning, so I figured it may not be worth having.

efrw 

Broken Btech UV-PRO

I further tested my UV-PRO to find it was transmitting less than 250mW when set to 5W. I compared it to another radio using a nearby tinySA. I RMA-ed it and mailed it back to BTech for repair or replacement.

btech  uvpro  rma 

985 Workbench: 2025-06-30

My Weeks in Radio

  • traveling
    • Chino Hills State Park near Los Angeles
    • 2 activations
    • hiked and biked my gear in on my back
  • Field Day QRP, emergency power, on the patio, at home, 50 contacts = 650 pts

Others

  • W8CRW, CR:
    • 985 field day
  • KC3HQZ, Jean:
    • 985 field day
  • AC2EG, Eric:
    • new the group and field day
    • rather build than buy, but using echolink right now
  • AA3LH, Leon:
    • mostly dups at field day
  • KV3JGB, :
  • KC3SQI, Wayne:
    • 10 meter antenna mast assembled and ready to go
  • KC3WWC, John:
    • (making it in over RF)
  • KC3TYX, Vic:
    • field day in maryland
  • NA3CW, Chuck:
    • Field day prep, operation, cleanup
    • PM/AM Net on Sunday
  • KC3OOK, Bill:
    • hosted a modified roundtable on 985 simplex, since power was out on repeater
    • simplex net
    • field day
  • KD3EMS, Chris:
    • 985 field day observing AF3Z operate along with NA3CW
    • 7-8 contacts
    • need to get general license
  • AF3Z, Jim:
    • field day
      • CW with luke
  • W3KZG, Scott:
    • 985 field day
  • KC3SCY, Luke:
    • 985 field day
    • logging had some trouble
    • pretty smooth, otherwise
    • working on CW
    • planning to chase 13 colonies
      • work them early in the morning
  • W3QP, Tim:
    • K3H, Pennnsylania Homestead Festival in Kutztown
      • looking for operators for the weekend
  • W3MFB, Mike:
    • heard VHF packet propagation, so made some contacts
      • 6m
  • WA3VEE, Ron:
    • 1400 contacts total at field day
    • collecting photos from field day for the smugmug gallery

Questions

  • KC3HQZ, Jean:
    • Why does a GOTA station have a different call sign from field day activities?
    • AF3Z, Jim:
      • GOTA is meant to encourage newcomers and guests.
      • It’s a bonus station that doesn’t count in the total simultaneous stations.
      • May be worth more points on its own.
    • W3MFB, Mike:
      • helps keep count of contacts made by newbies and guests.
  • KC3SQI, Wayne:
    • Considering changing from a Windom to a Hex Beam (25lbs) with a 1-foot base pole to the rotor, Would a small ChannelMaster TV antenna rotor work without a thrust-bearing at 30 feet?
    • KC3OOK, Bill:
      • Bill is new, but…
      • 25lbs sounds like a lot for an antenna, so might tend toward the better rotor.
    • W3MFB, Mike:
      • Agrees with Bill, spring for the better rotor.
      • Has seen a TV rotor drive lighter (6lb) antennas, but that’s much lighter.
      • TV antennas are only 10lbs or so.
    • N3OGF, John:
      • destroyed a radioshack rotor in high wind with a kushkraft
    • W3ZKG, Scott:
      • rotor doesn’t have a weight spec, but try to keep the rotor as close to the antenna as possible.
      • 25lbs seems heavy.
      • lesser rotors use plastic instead of bearings
    • WA3VEE, Ron:
      • some specs on google suggest 15lbs capacity.
      • consider the extra weight of ice
    • KC3SQI, Wayne:
      • may try the thrust bearing and lighter rotor
  • KC3WWC, John:
    • I have a long EFHW for 80M, but it’s hard to get lined up on all bands, so I need the tuner to touch it up for half the bands. If I need the tuner for some bands, is there much benefit to this EFHW over a 71-foot random wire I really liked.
    • NA3CW, Chuck:
      • RG58 is giving loss
      • Generally, you don’t want to tune high SWR through “thin” coax
      • tuning at the wire would be better
    • W3QP, Tim:
      • It’s normal for EFHW in trees to not necessarily line-up
      • Don’t know efficiencies of 49:1 vs 9:1 vs 64:1. That could make a difference.
      • stack cores to handle more power in the transformers
      • there are ways to measure with nano-vna.
      • it depends what SWR you’re pulling on each band.
      • transformer has different effeciencies on each band.
  • KD3AIS, Tim:
    • As a newer ham, not a general yet, listening on Yaesu FT-991A to traffic, is an external screen useful?
    • W3MFB, Mike:
      • He operated the 991A at field day, and the waterfall is pretty low-res, but wouldn’t bother with a larger screen.
      • recommends using ears and turning the dial
      • listen and make sure he can understand the station, write it all down, then contact.
    • W8CRW, CR:
      • agrees with Mike, listen
      • but also has a display connected to his radio as a bonus
    • W3KZG, Scott:
      • also has a DX-10 with the built-in display and an external screen.
      • didn’t miss it on or off on field day
      • use a DDI cable to ensure no feeding voltage back into the radio
    • NA3CW, Chuck:
      • had Ron’s 710 with the little screen, plugged into a big screen.
      • easier to see settings and meters
      • especially when visitors were trying to see
      • bandscope got sort of useless with higher noise levels
      • for bands that come and go (6m, 10m), it’s good to see intermittent traffic
    • KC3WWC, John:
      • I like the waterfall, so I spot activity, like lots of CW.
  • W3MFB, Mike:
    • Are 6M and 2M beams at field day site always available for use?
    • NA3CW, Chuck:
      • as long as it’s up, it’s available
      • it’ll need coax

21 Technet: 2025-06-29

My Weeks in Radio

  • traveling
    • Chino Hills State Park near Los Angeles
    • 2 activations
    • hiked and biked my gear in on my back
  • Field Day QRP, emergency power, on the patio, at home, 650 pts

Others

  • K3EA, Greg:
    • in charge of antennas at local field day
    • 13 colonies coming up: https://13colonies.us/
    • Marconi Memorial contest
    • see the calendar
    • monitor FT8 or calling on 6M
    • good HF this week
    • Guyana: 8R1TM
    • Russians in Mozambique: C94RRC, C93RRC
    • LotW is undergoing maintenance
  • KB9AWS, Bernie:
    • hearing VHF openings in the morning
  • KC5DRI, John:
    • conversations with truckers while traveling NC on simplex
    • travel using repeaters
    • got to dayton this year
  • KA3TKW, Tom:
    • SSTV coming around july 4 from ISS, watch email
  • KK4KKW, Steve:
    • POTA Hunting
    • visited SPARC for field day
  • K3DMM, Denny:
    • heard lots of ISS contacts on field day
    • saturday is firecracker hamfest: postal picnic grounds
  • KC3NWN, Jim:
    • contact from a mobile at camp right now
  • VE3HOH, Pete:
    • local field day in macadoo
  • KC3VZU, Bob:
    • setting up a wire antenna and an HF rig
  • W3MW, Don:
    • lots of work getting antennas up
    • trying 10GHz, but blocked by foliage
21  ka3tkw  technet  net 

ARRL Field Day 2025

I operated the last 3 hours of ARRL Field Day. My station was at home on emergency power and QRP, so 1E class. I made 50 contacts so that earned me 650pts.

arrl  hf  fieldday 

US-1139 Chino Hills

I activated Chino Hills State Park, US-1139, twice while in Los Angeles. I hiked in 1.5 miles for one activation, and biked half way up one of the hills 5 miles for the second.

pota  ca  hf 

985 Workbench: 2025-06-16

My Week in Radio

  • 80M EFHW out in the elements
    • needed cleaning/repair for corrosion and high SWR
    • interesting to reintroduce pieces to see their effect:
      • counterpoise
      • capacitor
  • checked into the APRSThursday net right away in the morning
    • automatically stayed subscribed for 12 hours
    • received 174 messages over 12 hours
    • across the US and rest of the world
  • headed to Los Angeles for 12 days
    • find some parks
    • get back for 1 day of field day

Others

  • W3CRW, CR:
    • Chuck’s presentation on connectors
  • W1RC, Mike:
    • fiddling with allstar
  • N3RBN, Paul:
    • back on the air with pass-through panel in the window
  • NA3CW, Chuck:
    • busy with coax
    • inherited lots of coax from a SK in West Chester
      • we don’t want the RG-11 (75ohm)G
      • tangle
    • used it to demo the new and old connectors and repairs
    • more cable and connectors after breakfast
  • KB3ILS, Keith:
    • drawn back to the radio for field day
    • bands rough for low power work
    • learning about bandpass filters, and their design
      • induction and capacitances
      • measuring with nanovna and oscilloscope
  • KC3YSM, Steve:
    • learned about the coax connectors
  • WA3KFT, John:
    • finishing touches on shack
      • shortening cables, etc
    • has a set of tools that makes it really easy to terminate PL-259
  • KC3OOK, Bill:
  • KC3SQI, Wayne:
    • base for tilt-over mast is in concrete
    • tilt conduit mounted
    • figuring out locks
  • WA3VEE, Ron:
    • helped restring a 40M dipole at field day site
      • resonant right at 7MHz
      • took 6-inches off each end to get to 7.150MHz
    • everyone encouraged to visit field day
  • K3FHA, John:
    • working on some test equipment
  • KC3RFG, Jim:
    • repairing a mobile antenna
    • getting some good distance on 6M for the first time
  • W3KZG, Scott:
    • building camper/comms trailer
      • will bring it for field day

Questions

  • N3RBN, Paul:
    • RJ-something microphone connectors and cables, is there a way to straighten the coiled part to attach a new connector?
    • NA3CW, Chuck:
      • don’t know about straightening, but has wired a new cord to the mic.
      • could buy a cheap mic and steal the cable
    • W3KZG, Scott:
      • seconds buying a cheap/clone mic for the cable
  • KC3SQI, Wayne:
    • What’s the connector number for PL-259s Chuck used?
      • Chuck will email links.
    • Going to a mast that can support more than one antenna. should he pull a whole run for the 2M antenna, or try to route it through the remote switcher that’s good to 6M?
      • WA3VEE, Ron:
        • try to go with as few connectors as possible, especially on VHF/UHF
        • also, respect that 6M limitation on the switcher
      • KC3RFG, Jim:
        • home run is always better
        • the switcher may bleed signal to other lines
      • WA3VEE, Ron:
        • try to operate to the middle of the specs of gear
      • WA3KFT, John:
        • 14 coax runs into the shack
        • 14 switches for choosing radios
        • favorite switch is from Waters.

APRS Thursday

I joined the APRS Thursday HOTG (Hams of the Gram) net. I checked in by sending: ANSRVR CQ HOTG good Thursday morning. I guess it sent 117 messages to others, and for the 12 hours I was subscribed, I received 174 HOTG messages to my callsign from stations across the US and around the world.

aprs  uvpro  hotg  net