HF

I was seeing high SWR and started needing the tuner for the 80M EFHW. I checked/reseated connections at the wire and un-un with no change. I started testing down the line, and found that the outside connection to the pass-through cable was bad: it started pulling apart. I replaced the window pass-through, and now SWR is good again without the tuner.

My Week in Radio

• Winter Field Day
  • I logged for CW ops and listened along
  • I could hear 2-3 characters at a time

Others

• W8CRW, CR:
  • Field Day
• WA3VEE, Ron:
  • Field Day
    • operated most
    • worked N3FJP, author of the software
    • W1AW
    • W2AEW see on youtube
    • worked with Kianna
• W3KZG, Scott:
  • field day trailer worked out great
• KB3PZY, Al:
  • first field day
  • Thanks Harvey for mentoring
  • 30 some contacts
• KB3ILS, Keith:
  • antennas up at the field day site
  • got to WFD early
  • laptops, network, power worked great
  • 450-475 contacts made
  • SKCC
    • PR on 6M CW
    • Alaska on 15M CW
• WA3KFT, John:
  • WFD with another club, 75M
    • didn’t hear anyone in the afternoon, all noise
    • early evening it lit up
• KC3OOK, Bill:
  • simplex net
  • welfare net
• NA3CW, Chuck:
  • welcome Al
  • antenna install for WFD with lots of people
  • “how to cut a dipole the second time, every time” worked pretty well
  • used Joe’s tuner with 100W testing
  • PMAM pre-net
• AF3Z, Jim:
  • SKCC month ends on saturday
    • coordinating SKCC ops, had enough of it :)
    • worked 240 contacts with special callsign
  • worked WFD with cornwall station
    • proved total lid
      • operated a Elecraft K3 on 40M
      • heard W3R, but couldn’t get an answer
      • K3 needs VOX enabled for CW, so it wasn’t transmitting
      • quit for the morning
      • realized much later about VOX
• AA3LH, Leon:
  • winter field day at home: 40M and 80M *** Questions
• KD3EE, John:
  • What was the problem with the 80M antennas and that radio that rebooted?
  • How significant is the dipole arrangement (flat vs inverted-v) to multi-station operation?
  • W3KZG, Scott:
    • originally thought it was RF
    • switched radio to AC-DC power supply, and then the radio was fine
    • trailers battery may not have kept up with the severe cold
    • new radio couldn’t tolerate voltage drop, but older radio was ok
    • LiFEPo battery struggles under 30F
    • CW dipole showed high SWR at one spot, still needed to be investigated more
  • WA3VEE, Ron:
    • when the weather is better, Ron will run a complete analysis on each antenna on the site.
    • we can talk inductance and capacitance then
    • there seems to be an RFI problem from a power transformer insulator up there as well
  • KB3ILS, Keith:
    • 80M dipole cut for sideband worked well
    • 40M CW in the corner may need some work
    • 1 beam was pointing at the 80M dipole, so likely caused lots interference
    • it’ll be good to analyze when no one transmitting
    • one 40M dipole may be close to noise.
    • some experimenting to do
    • we still got lots of 40M contacts
  • NA3CW, Chuck:
    • power-line interference has been an ongoing issue
    • Chuck has a small moxon for 137MHz that will be good paired with AM on his HT to search for the noise source
      • worked to find a bad pole in his neighborhood
    • inverted vs flat dipole
      • dipoles end to end have very little radiation off the ends.
      • inverted-v antennas would have seen each other on the ends
      • analyzers work with very low signals, so would have totally been skewed by nearby QRN and TX
  • KB3ILS, Keith:
    • Chuck, let’s build a dipole curtain array for field day.
• W3MFB, Mike:
  • HF vertical can have a ground plane, even in the air or on the ground? They help control common-mode current? Why use them?
  • WA3VEE, Ron:
    • the ground plane is the other half of your antenna.
  • WA3KFT, John:
    • Has the Amtron A99 on a tower without the ground plane kit, but has a TV mast below it on the tower, so may be serving the purpose.
  • W3KZG, Scott:
    • IMAC 2000 antenna, 50 ft in the air without the ground plane kit. The galvanized steel mast underneath it served as the ground.
    • AMTRON 99 came with it, so he installed it. It looks cool.
  • AA3LH, Leon:
    • Used tuned hamsticks in Colorado, and put out lots of radials.
  • KD3EE, John:
    • the computer and radio going wonky (touchpad, USB, etc) always remind me when I need to add radials to my vertical antenna.
  • W3MFB, Mike:
    • With the IMAC, he knows he needs the ground plane kit as it gets higher in the air.
    • His is grounded to a gas pipe, so it seems to work pretty well, and he’s gotten to Australia.
    • Also has lots of coax to absorb it.
    • Has gotten to Australia with it.
• KD3BPI, Simon:
  • He’s planning for antennas on the house, 2 stories, walk-up attic. He has a dormer facing west, and was planning to mount antennas there. Easy to get to them from attic. Can he mount all the antennas on one plate or should he space them out?
    • regional HF (20m) antenna and dual-band 2m/70cm antenna.
  • WA3VEE, Ron:
    • Personally doesn’t like to have antenna on the house, since it draws lightning.
    • How much land?
      • Simon: L-shaped, 1/3 acre, but no trees that are actually his.
    • 40M would be a good horizontal wire for regional NVIS
    • grounding is imperative for lightning protection of the house.
    • those antennas, in size, are very different.
    • wires are easier for HF
  • W3GMS, Joe:
    • the Hustler 5-BTV for 80-10M is a good option
    • he has radio and tuner for Simon
  • W3MFB, Mike:
    • Hustler in the yard would be a good option
    • pin down the feed line and radials with lawn stakes
    • neighbors trees: any limbs over your property could be used to hold up an end fed antenna
    • get the antenna as high as you can get it
  • WA3KFT, John:
    • He has 5 antennas at the top of a tower, like a candlabra.
    • an edger is good for grooving the lawn for wires
  • WA3VEE, Ron:
    • sent link to the Hustler 5-BTV
    • the digital modes are FT8 and PSK31
  • W3KZG, Scott:
    • Has an NMO lip-mount with dual band antenna clamped to the rain gutter of the shop.
  • KC3NZT, Harvey:
    • using a copper pipe j-pole inside in the attic of the garage.
      • should work just fine.
    • an HF antenna in the attic would work fine too
  • WA3VEE, Ron:
    • for new hams and those in HOAs, attic antennas can be effective
  • W8CRW, CR:
    • Why’s the 5-BTV so highly recommended, compared to other variations?
    • WA3VEE, Ron:
      • the 5 walks the line of versatility and size
      • they’re different sizes
  • W3GMS, Joe:
    • a 4-BTV is 4-bands, 5- is 5-band, etc.
  • KA3GLI, David:
    • on the 5-BTV, what auto-tuner is recommended?
    • W3GMS, Joe:
      • LDG RC-1 auto-tuner helps match as you get away from the vertical’s narrow, high-Q, resonant spot.
  • KD3EE, John:
    • remember you can build these HF antennas with some wire and toroids.
• KD3BPI, Simon:
  • How does height affect performance of a vertical: ground vs roof?
  • W3GMS, Joe:
    • wire radials on the ground are easy. detuned by the earth.
    • lots of short radials are best
    • elevated radials will perform better, but will require tuning of radials.
    • random lengths are fine on the ground
  • KC3WRY, Matt:
    • a ground-mounted antenna is easier to tune, instead of up in the air.
    • ground-mounted can always later be moved.
  • WA3KFT, John:
    • worked at an AM radio station.
    • when they moved, they rebuilt all the radials.
      • 60 short and 60 long radials
  • W3GMS, Joe:
    • 8 radials with the 5-BTV at the beach was fine
    • gains aren’t as impressive after the first radials

I activated US-8878, State Game Land 181. It’s my 39th unique park activated on my way to the next award at 40. I made 11 FT8 contacts at 2-4W with my speaker-wire doublet pulled up into a tree. I had extended the length to 44ft length per some online recommendations.

The battery was low on my little Evolve 3 laptop, and I wanted to charge it from LiFePO, but it wouldn’t charge. It turns out that I had inserted the barrel adapter into the headphone jack instead of the tiny power port. The laptop had died at 9 contacts with 3 people calling me, so I switched to my other laptop to finish up.

10M tuned OK, 40M tuned OK, and 20M tuned easily, but with both laptops, the radio would drop the USB connection immediately upon transmitting. I may need to add a current balun between the radio and matching transformer.

For this year’s CQ Worldwide CW contest I heard KH6J from Hawaii on 40M, but I couldn’t contact them. Locals weren’t worth anything except for unique CQ zones as multipliers. I kept it to 5W and made 20 contacts on CW. I turned up to send 25wpm, since everyone was going so fast.

I still rely on the excellent decoder in the R1CBU radio UI, but I’ve been practicing reading CW too.

I ran out to Sam Lewis, US-1418, to activate when the rain stopped.

I took a few minutes to setup my normal EFHW running North-South to operate more to the East and West, though I did get a contact to Colombia.

I operated mostly low-power FT8, 1-4W, but mostly 2W. I chased and got 1 CW contact before it started getting cold and dark.

I played a little FT8 at US-8834, State Game Land 136, with only 2W on my 40M EFHW in an inverted-V. I made 26 contacts, and looked for some CW, but barely heard anything.

I headed to US-4356, Boyd Big Tree Preserve for an activation. I took my time and med 51 contacts: FT8, FT4, 2 SSB, 2 CW. I stretched my 40M EFHW from pavilion to tree to the East. A bystander hung out for 40 minutes to see what I was doing, so I showed him around the bands.

I activated the Conoy Wetland along US-4567. I used the 40M EFHW running to the South East. I stayed on 40m, using FT8 and 4W. I got my 30+ contacts calling CQ POTA, and didn’t chase anyone.

I experimented with the counterpoise:

• I saw 1.5:1 SWR with the counterpoise coiled up.
• I saw a lower SWR with the counterpoise unwound.

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.

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.