Tech

Portable Doublet

I built a doublet experiment at a park today.

• split 6.25M of speaker wire to be a 12.5M-long, center-fed, non-resonant dipole, like my portable EFRW I usually carry.
• the rest is balanced feed line
• right to the radio
• tuned 20M and barely tuned 40M on my X6100
• 2W FT8 heard in africa and europe
• next try it with a 4:1 or 9:1 balun to match better

My Weeks in Radio

• feel lucky to be in this area with lots of repeaters and traffic
• flagpole with YAGI snapped in the wind a week or 2 ago.
• strung the slim jim in the tree a little higher
• playing with nicsure firmware on the RadTel RT-880G.
• saw a great youtube video on APRS bots:
  • MPAD being very versatile for: weather, callsign lookup, location report to email
  • ISS bot that tells you the next pass
• listened to a couple sweepstakes contacts: to lazy to try to communicate that much exchange QRP SSB

Others

• WB3LNY, George:
  • Tried La Grange repeater in KY, but no one answered.
  • Keep as active as we can.
  • Use it or lose it: they’ll take it away
  • linking repeaters may help generate more traffic
• VE3HOH, Pete:
  • working on some Yaesu FT-100’s
    • predecessor to FT-857.
• KA3TKW, Tom:
  • lunch Thursday this week
    • everyone share a radio gadget
    • lots of mini demonstrations
  • ISS scrubbed the SSTV after first couple days
  • ISS ham repeater is still good though
    • high pass monday, 4:45pm
  • Russian satellites doing SSTV
    • 435.890 ARCTICSAT-1: 2 good passes Monday morning
    • 5 minute cycle, so don’t be discouraged
• KK4KKW, Steve:
  • many times can’t make contacts while traveling: 2M or 10M
  • hearing people on HF, but not making contacts
• N7JMS, John:
  • digipi doing SSTV to get ARCTICSAT-1 images
• K3DMM, Denny:
  • doing some of the sweepstakes
    • got Hawaii
  • definitely trying morning pass of arcticsat-1
  • trying for ISS pass as well
• KD3BOV, John:
  • rain gutter antenna
  • getting started with the ICOM 2730

Swap and Shop

• WB3LNY, george:
  • new bird dummy loads
• VE3HOH, Pete:
  • rohn 25 tower sections:
  • guy wire and anti-sway section for the rohn 25
  • 432MHz yagis
  • 2M yagis for weak signal
  • 950ft of philly strand on a roll
• KA3TKW, Tom:
  • shortware receivers
  • moto 25W transceivers
  • 24ft camper for sale: $1500

My Week in Radio

CQ WW DX SSB Contest

• 12 contacts
  • including Canary Islands near Africa
  • heard lots of places that couldn’t hear me: Galapagos
• QRP (<5W)
• Logged in World Radio League website and phone
• exported a Cabrillo file in the right format to submit!
• POLO didn’t seem to collect the right fields

Great Ham Fest in Harrisburg

• Saw some faces from a couple different repeaters I frequent
• Tom’s satellite presentation was great, and we had a really good pass to hear the astronauts talking to the museum in Indiana.
• Bought a cheap power meter for HF and some connectors for it

My Week in Radio

• I like radios with open software
  • F4HWN 4.0 alternate firmware released for Quansheng
    • includes fixes for the spectrum analyzer that I contributed
  • R1CBU 0.29.2 just released for Xiegu X6100
    • includes fixes for bugs I found and submitted
• I tried some APRS to the ISS from the Btech UV-PRO
• Did a little RTTY for NAQP
• Contacted N4T DXpedition on 20M yesterday
  • My CW was pretty rough
  • I could hear them with the EFHW for 40M in a park,
    • but not the upgraded 107ft EFRW at home
    • probably orientation

Others

• K3EA, Greg:
  • contests, space weather, DX
• WB3LNY, George:
  • debugging power problems: tighten your lugs in your panel
  • “Pale Blue” is a company in Utah making rechargeable Li-Ion batteries with USB charging port.
• VE3HOH, Pete:
  • designing an NVIS for 40m, fan dipole
  • maybe also a 10m vertical in it.
  • nice presentation from KA3TKW, Tom, on working satellites
• KA3TKW, Tom:
  • new FM bird: Hades R, SO-124, no telemetry yet.
  • ISS repeater and upcoming passes
  • AO-123 is new, FM repeater: 435.400 FM.
  • Ham Lunch this Thursday, noon.
    • presentation: Beginners Guide to FM Satellites
• KK4KKW, Steve:
  • some HF, but repeater started dropping
• W3MW, Don:
  • trying to purchase a spectrum analyzer, but UPS isn’t delivering it.
  • starting up attic/roof work for antennas.
  • testing 10GHz setup soon
• KC3ZBI, Ron:
  • working on antennas for some upcoming contests

My Week in Radio

• My favorite way to learn things: experiments
  • diagnose and repair a bad coax cable
    • no continuity on center conductor
    • plugged it into the nano vna, switched to smith chart
      • saw a big spiral around the outside
      • no change in the graph on the other side
      • compared to a working cable
      • it should have spiraled
      • maybe alonger spiral for a longer cable
  • 71 foot random wire with 5W is not needing the tuner
    • disconnected lots of different places and checked lots of SWR without those connections
• Tossed a wire into a tree at Swatara State Park today for some POTA contacts
• Operated the last 2 hours of the RTTY contest on 10m, 15m, and 20m.

My Week in Radio

Contesting

I finished the FT Challenge. There was no special exchange this year. We could use other defined subbands in addition to the regular frequencies to alleviate crowding. We could work anyone, even if they’re not participating explicitly.

I operated QRP, so it was nice to find the quieter subbands and more FT4 activity. You earned multipliers for each 3000km, so I don’t really know on my score yet.

I found wsjtx-improved on the Debian Linux repository, so used that. I saw the color improvements, the better location labels with states, and it had filters.

AllStar

I learning some obvious things about AllStar: it can’t hear my DTMF if it’s currently transmitting, since it’s simplex, so it’s hard to control on a busy net.

Yagi in the Wind

Finally, I watched my home-built yagi flapping around on that windy day. I guess I can stop worrying about it, since it held up fine.

My Weeks in Radio

• QRP on a couple hawaiian islands
• not much 2m activity
  • added some repeaters and scanned
• POTA
  • Xiegu x6100 mostly turned up to 8W
  • mostly 10m-30m and everything in between
  • challenging to be on an island where you have to go thousands of miles or you reach no one.
  • antennas:
    • 40M EFHW where I had room,
    • 41ft long EFRW with less room
    • vertical whip and coil attached to a fishing pole for a less conspicuous setup on some beaches
  • 6 parks and 2 trails on 2 islands:
    • sandy beaches
    • rocky lava fields
    • inside diamondhead caldera
    • atop steaming kilauea
  • reached:
    • west: Australia, New zealand, Fiji, Japan, Russia, China, South Cook Islands, Samoa
    • east: North Carolina, Kentucky, Ohio, Dominican Republic, Argentina
  • practiced some CW on the beach when I didn’t get out the computer
• back to a home park yesterday, but the weather was not as nice.
• took down my home-made 2m antennas and straightened them up.
• trying F4HWN 3.7 firmware for Quansheng radios
  • from a scanner-centered AUBSUK firmware that was skipping some channels
• looking forward to that FT Challenge contest

Other News

• contests
  • CQ WW CW this weekend
  • no contests for the Thanksgiving weekend
  • following weekend
    • 160m CW arrl contest
    • FT challenge contest
• KA3TKW: R&L electronics: TYT MD-9600, GD-77 open firmware
• digipeat through the ISS
• high pass of ISS tonight at 9:10pm.
• 224.220 repeater is up and running, but not linked yet.
• KC3NNO: mini dxpedition to canada

My Week in Radio

• I received a couple images from ISS, but it ended quicker than I realized.
• JARTS RTTY contest coming this weekend
• I did a little CW for POTA.
• Trying to reach a little further over a hill and to the East
  • building a yagi on a flag pole from a calculator using ARRL spacing
  • 50W TYT radio
• This Week in Ham Radio Podcast Ham Radio History:
  • 1916, amateurs exploring propagation
  • 1917 first, faster trans-continental relays with ARRL

Others

• K3EA
  • Upcoming ARRL Sweepstakes for CW
  • Munsters had a Ham Radio episode
• KA3TKW
  • W3UU Harrisburg Ham Fest this Saturday
  • ARRIS mission on 24 Oct, 11:15AM, 145.800MHz
  • Tri-repeater is up: 224.210 PL 123.0, 449.925, 53.21
• KK4KKW
  • Sudden SWR reading on 40M antenna

My Week in Radio

• I Wish I had paid attention to the contest calendar for WW digital contest.
• I’m awaiting a confirmation on QRZ for my last of 50 states: Hawaii.
• Lots of new open updates for the Xiegu X6100.
• Started compiling firmware for Quansheng.
• Playing with a couple heltec v3 meshtastic nodes
  • marveling at the range, better than APRS?
• I did my first POTA activation by only voice, no digital.
  • lots of qso parties
  • heard Hawaii really easily
  • Wasted someone’s time trying CW

My Week in Amateur Radio

• Overload on UV-K5 with better antennas
  • UV-K5 & UV-K6 for comparison - not broken
  • Balance antenna location good enough but not too good
  • FM bandstop filter helps a whole lot
• Modifying params database on Xiegu X6100
  • Now shows me accurate bands and privileges, so I won’t accidentally wander beyond my privileges.
• Picked up an Evolve 3 laptop that runs on 12v
  • Linux is being challenging: wifi and sound.
• Packing camera and radio gear or eclipse trip tomorrow

I think I was having antenna trouble, so I couldn’t check in. I only listened.

• KA3TKW has digipeaters
  • 145.010 FM digipeater
  • 28.105 USB digipeater
  • packet radio is free
• FM satellites that are easy to use
  • ISS
    • packet digipeater
    • voice
    • 10:35pm good pass
  • SO-50
• Look into digi-pi