21 Tech Net: 2026-02-15

My Week in Radio

  • CQ WW RTTY contest
    • 70 contacts in one afternoon
    • a little antenna maintenance in the middle
      • poking at un-un
      • reinstalling counterpoise
  • PSKFest
    • 3rd place in QRP class (of 4 people)
  • fixed some connections in or near the house to fix some 2M antenna performance
  • using pulleys in the tree for cleaner rope work in trees
  • New R1CBU 0.32.2 firmware for the X6100
  • loaded frequencies into the scan on the quansheng to watch for those new satellites Tom’s been emailing
  • APRS getting much better on RT-880G with alternate firmware
  • loved to hear about practical guid to IRLP into KA3TKW

Others

  • K3EA, Greg:
    • RTTY contest
    • CW contest
    • NA QSO Party for RTTY upcoming
    • state QSO parties are coming up, good for WAS
    • 17 and 20M will have best propagation for DX
    • hamclock backend is going away
  • WB3LNY, George:
    • Hamcation in FL
      • nearly as big as hamvention
  • KC5DRI, John:
    • Hamcation in FL
      • meeting people
  • WE3ARE, Paul:
  • W3TUG, “Tug”/Ray:
    • Hamcation in FL
  • VE3HOH, Pete:
    • Chris Casper demoed meshtastic for another club
    • wants to get into it
    • has openhamclock running
  • KA3TKW, Tom:
    • UMK-1 satellite: got a good pass and posted SSTV photos
    • RS-18: 437.950 downlink for SSTV. 10 or 11pm tonight, then 10 or 11 am in the morning
      • then done
    • amsat website -> satellite resources -> current satellite status
      • added these new SSTV satellites
    • chinese space station will have ham radio soon
      • 145.825 / 436.510 down
      • and another
    • ham lunch last thursday: hibachi buffet
  • K3DMM, Denny:
    • some satellite contacts from within the house
    • QRZ 250 certificate
      • 20% confirmed on SSB
    • AnyTone AT-890UV
      • a friend has a video using full duplex on the HT for satellite.
  • KC3NWN, Jim:
    • using a president washington on 11M
    • XFM program for satellite
    • elwood of ham clock SK
  • KA3TKW, Tom:
    • IRLP How-to
      • buy an IRLP node for $250-500
      • get a node number assigned
      • 9204 is the one 21 is connected
  • KK4KKW, Steve:
    • some HF work down in Florida
      • good contacts
    • contacts harder up here
  • N7JMS, John:
    • FT8
    • listening on 21

21 Tech Net: 2026-01-18

My Week in Radio

  • RTTY Round Up got me the last couple states I needed on QRZ with the new callsign
  • USB adapter for CW key on computer
    • use it with websites
      • vband for online CW chat
      • morse invaders
        • keying CW for video games is improving my accuracy
  • Continue to practice to improve reading CW
  • Visited the hamfest in Harrisburg, but didn’t buy anything
  • Headed East tomorrow to help install antennas for field day next weekend
    • see how others do this more reliably
    • learn some better practices
    • my antennas usually get replaced regularly for repair or boredom
  • Nothing for swap and shop

Others

  • WB3LNY, George:
    • Hamfest in Harrisburg
    • local 6M repeater
    • modifying a big icom battery
    • got a new IRLP node from a guy in Chicago for portable use
  • KA3TKW, Tom:
    • keep your groups.io account active
    • John Holler passed away
    • Jeff Dipolo operating VHF contest on: 50.140 USB, 146.52, 446.00
      • Chambersburg
    • new satellite: KW2
      • 436.950 down
    • Ham lunch on last Thursday this month
      • Glen talking about directional beverage antennas
      • show and tell
      • Riley will be there
  • VE3HOH, Pete:
    • shared some history with John Holler
    • helping restore service to a local repeater
      • introducing and balancing some more battery backups
    • some work on power supplies
  • K3DMM, Denny:
    • dabbled in NA QSO party
    • trying some DX work to Fiji
  • KD3BVC, Jeff:
    • just getting started with his Baofeng UV-5R
    • built a jpole
  • N3RBG, Jeff:
    • 50 W, Comet GP-6, 70ft up a pine tree, good signal to/from Plymouth Meeting
21  ka3tkw  net  technet 

21 Tech Net: 2026-01-04

My Week in Radio

  • muted the APRS channel on my UV-PRO, so I don’t need to hear that squawking away
    • there is an option to mute digital, but it only works when it recognizes it’s digital
  • been testing a doublet built from:
    • a split speaker wire,
    • 44ft end to end
    • a 4:1 balun
    • choke balun
    • 30 FT8 contacts on 20M at 1W for a park activation
  • 80M EFHW today for better receive to place 21.6M-long EFRW
  • worked contests:
  • gave one of Tom’s cool little ATS radios to a friend’s kid, get him bitten by the bug

Others

  • K3EA, Greg:
    • special event station
    • this past weekend:
      • rtty contest
      • psk31 contest
    • NA QSO party, CW next weekend
  • WB3LNY, George:
    • working on some 12V power supplies
  • VE3HOH, Pete:
    • ordered some radios
    • great tuner
  • KA3TKW, Tom:
    • RS-40 pass at 8:40 tonight
    • 437.625
    • no special equipment needed
    • trivia net on wednesday
    • Saturday Hamfest in Harrisburg, W3UU
    • new commercial satellite:
      • AST bluebird 6
    • mod firmware for ATS v4 radio
      • waterfall
      • s17432
      • decodes CW and RTTY
    • DigiRig Mobile: $49
      • audio
      • PTT (no need for VOX), so better than just a USB sound card
      • connect lots of radios
    • lots of SSTV
    • ordered a UHF Moxon SSTV antennas
      • big in RC airplane world
      • range video LLC
  • K3DMM, Denny:
    • not much luck with SSTV yet
  • KC3VZU, Bob:
    • not getting to the ham fest
    • working on full-band radio in truck, replaced the mic
  • W3MW, Don:
    • finishing wiring of antennas
    • getting shack back in order
  • KC3ZBI, Ron:
    • doing paperwork to do a ham radio program for a local school
  • KC3EWN, Curly:
    • new Arrow antenna
    • Icom W-32A, full-duplex, 5W
    • ready for satellite
  • K3EA, Greg:
    • DigiRigs have wiring for old rigs
  • VE3HOH, Pete:
    • watch 401MHZ and 401.025 for occasional satellites
21  technet  net  ka3tkw 

21 Technet: 2025-10-12

My Week in Radio

  • traveling:
    • cruise ships specifically forbid ham radios
    • practiced copying some CW
  • listened to a little PA QSO party, but didn’t participate
  • 21 has been lower power recently,
    • wondering if it’s my multiple antennas or the repeaters
    • definitely at least one feed line problem diagnosed during this net

Others

  • K3EA, Greg
    • QSO parties coming up
      • Germany
    • CQ WW SSB
    • Vanawatu, SSB
  • N7JMS, Jon
    • digi-pi
  • KC3ZBI, Ron
    • talking to a classroom about radio
  • KA0JQO, Kevin:
    • repeater power
    • when no double beep, then the repeater is putting out full power: 115W
    • when it’s beeping, the power is low: 20W.

Swap and Shop

  • KA3TKW, Tom:
    • shortwave receivers
technet  ka3tkw  21  net 

21 Technet: 2025-09-14

My Week in Radio

  • KC3WWC changed to KD3EE
    • nice for CW
    • start over with a whole new log book
    • days to find and update everywhere
  • packet radio for Winlink and BBSes including KA3TKW
    • like my old modem BBS days
    • phone + btech HT as TNC
  • POTA, FT8 + CW
    • new Gabil whip with the sliding coil is very convenient
    • learning value of chokes in the right places: computer interference from RF
    • chasing CW POTA from home
  • working a little more 10M now as we near autumn
  • have a google calendar feed from https://contestcalendar.com/ keeping my calendar very full should the mood to do some contesting strikes

Others

  • KA3TKW, Tom:
    • trivia net has new format: 5 digital
    • digipeaters
      • 145.010
      • 28.105
  • K3EA, Greg:
    • heard hamsci presentation:
      • study from eclipse
      • upcoming study on meteor scatter
    • training session on the local club station
    • contests:
      • AARL Sept VHF this past weekend
      • WAE SSB contest
      • next weekend: QSO parties
      • following weekend: CQ WW RTTY
      • https://contestcalendar.com/ for more details
    • solar flux index and sunspots down this past week
    • normal/average propagation
    • some disruptions coming up: increased K index
    • minor storms coming tomorrow.
    • check clusters for current DXpeditions
      • Palestine/West Bank on the air for about a week, FT8+CW
    • no QSL cards this week
  • WB3LNY, George:
    • local hamfest in Indiana
      • sold some LMR-400 + other things
    • new tower in place
  • VE3HOH, Pete:
    • recovering from back injury
    • cleaning up radios
    • working on some amplifiers
    • getting some HF wires up
  • KA3TKW, Tom:
    • Owen Garriott, W5LFL, was the first person to operate ham radio from space in 1983
    • easy sats:
      • ISS
      • SO-50: tues + wed 7:30pm
      • SO-124: tues + friday 12:25pm
      • SO-125: tues 11:25, wed 12pm, thurs 10:30am
    • looking for a presentation for next luncheon
  • K3DMM, Denny:
    • worked PO-101 earlier in the week
    • Route 66 on the air: 12 of 19 cities, and 2 of 5 rovers
      • request a cert with even 1 contact
    • met fellow ham at RV show, recognizing antenna
  • KC3ZBI, Ron:
    • had someone try to cut his coax
    • wondering about periodically reprogramming the keps in his OpenGD77 HT
    • Tom: every 10 days or so
  • W3MW, Don:
    • VHF contest, but not participating
    • antenna work in nice weather
    • looking forward to december contest
  • KC3NWN, Jim:
    • new alinco rig, 60m monoband, beam pointed to repeater
    • watched recent ISS pass
    • SO-50 often works for him
    • east stroudsburg hamfest
    • there’s AM on 17m
    • lots of simplex 2m and other VHF
    • QSL card from oklahoma on 17m

Swap and Shop

  • VE3HOH, Pete:
    • rohn tower with guy cable, 8 sections
21  technet  net  ka3tkw 

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 

21 Tech Net - 2025-05-18

My Weeks in Radio

  • French Creek State Park (US-1355)
    • All FT8, 1-2W.
    • Tried PSK, but no one responded.
  • 80M EFHW, 130ft
    • Built a 64:1 unun for it to help match better than the 49:1.
    • Resonant in many places, maybe need tuner in one band.
  • Customizing Allstarlink node to make it easier to manage.
  • New R1CBU firmware for my X6100.
  • Getting tempted about the zbit or sbit, but the X6100 scratches that itch for being able to customize it.

Others

  • WB3LNY, George:
    • Dayton Hamfest.
  • KA3TKW, Tom:
    • No net on holiday weekend.
    • Enjoying zbitx and zbitx.
    • Visited club in Letterkenny, satellite presentation.
    • New power connectors for the zbits.
  • VE3HOH, Pete:
    • Tried 6M with a quarter-wave on mobile.
      • Worked well, trying some repeaters.
      • Working simplex on trip from Pottstown to Pine Grove.
      • Fixing connectors.
      • 100W.
  • W3MW, Don:
    • 2.4GHz station ready to go with loop yagis.
    • Soon will have 5.6GHz by next month.
    • UHF pre-amp.
    • Pre-amp is more necessary, at the antenna, on these higher frequencies.
  • KC3VZU, Bob:
    • Looking into RADTEL 880 w/ HF, VHF, UHF, SSB, 10W.

Swap and Shop

  • W3MW, Don:
    • IC7300, 100w, portable, tuner, pack setup.
    • Looking at Yaesu, FTX-1.

21 Tech Net: 2025-02-02

My Week in Radio

  • I did field day with a group out toward Parkesburg
    • I saw a fancy satellite station for sideband, etc in action
  • Attended the lunch on Thursday
  • Had Direwolf monitoring a plain ol’ Quansheng to decode packet
  • Btech UV-PRO
    • inexpensive
    • APRS location and messaging
    • KISS TNC over BT
    • WoAD on android
    • Winlink
    • Terminal to access BBS on KA3TKW
  • Trying to build a tactical delta loop
    • 4:1 balun
    • 2 17 ft whips
    • 25 ft wire for the top
    • 3d-printed base

Others

  • K3EA, Greg:
    • QSO parties
    • upcoming contests
    • Solar weather
    • DX
      • Wake Island on 10M
      • Gambia, 10-20m, FT8
        • our sunrise
      • Rowanda, 10-30m, FT8, CW
    • New DXCC programs
    • Cards from bureau
    • Will talk at march lunch about Hamcation in Orlando
  • WB3LNY, George:
    • headed to Hamcation in Orlando
  • KB9AWS, Bern:
    • New batteries
    • Appreciate the group you have, use the repeater
  • VE3HOH, Pete:
    • Working on a combo nvis dipole for 40 meters
      • 20 ft above ground
      • Inverted V
      • Combo it with a vertial for 10M
    • Looking at military antennas for manpack
      • 30MHz-512MHz rubber duck on eBay
    • Looking at some low-power, remote receivers
  • K3SWZ, Glenn:
    • Worked 20M helping test a new DX station in Kenya
  • KA3TKW, Tom:
    • 145.825MHz ISS packet digipeater
  • KB3MIJ, Tray:
    • Repairing some repeater hardware
    • Got a replacement generator for a site
  • K3DMM, Denny:
    • Lunch on Thursday
    • HT with Arrow to make ISS contacts and SO-50
    • Try Arrow from inside
  • KC3ZBI, Ron:
    • Lunch on Thursday
    • Starting figuring out LoTW
  • N3LJP, Bill:
    • Looking for charger for AA, AAA lithium batteries that runs off 120V.
    • KC3BOB, Bob:
      • Hobby King is a good mail-order shop for battery needs
    • KC3WWC, John:
      • I like my EBL chargers off Amazon
      • Inexpensive
  • KC3VZU, Bob:
    • Ham lunch, liked the presentation
    • Going to get HF rig up and running

Swap and shop

  • WB3LNY, George:
    • Looking for a teletype
  • VE3HOH, Pete:
    • Some yagis for weak signal work
    • Drake TR7
    • Kenwood 830
  • KA3TKW, Tom:
    • 25W Motorola mobile rigs
    • RadioShack SW receivers
    • Panasonic SW portable
  • KB3MIJ, Tray:
    • Jet turbine generator
21  technet  ka3tkw  net 

21 Tech Net: 2024-12-22

My Week in Radio

  • ARRL 10m contest:
    • 13 CW contacts logged on paper
    • Iambic keyer set to 20 WPM somewhat confidently
    • Still relying on radio to decode for me
  • Hunting some CW POTA activators through the week
  • Practicing copying CW
  • Latest beta of Meshtastic app on Android is reconnecting automatically
  • ISS SSTV 25 Dec - 4 Jan

Others

  • K3EA, Greg:
    • FT8 whack-a-mole
    • Saw some RTTY contests
    • Canadian contest next weekend
    • https://contestcalendar.com/
    • Jan 4-5 is RTTY Roundup
    • Kids day
    • Good space weather, peak of solar cycle
    • DX
      • Phillipines
      • French Guyana
  • WB3LNY, George:
    • Diagnosing heating connections on large electrical panel
  • NE3H, Joe:
    • Spoke at length with a bunch of old acquaintances from Taiwan
  • KC3VZU, Bob:
    • Installing some coax and a 220MHz rig
  • KD3AGU, Richard:
    • Licensed 3 weeks ago
    • Setting up DMR
    • Listening to a net in Ephrata
  • K3DMM, Denny:
    • 16F outside, so no fun standing outside for satellite work
    • Tuned some mobile antennas
    • Worked a couple ISS passes
    • Good SO-50 pass
    • Looking forward to lunch on Thursday
  • WA3WIJ, Ron:
    • Rebuilding Halicrafters radio with caps and tubes
    • Preparing for straight key night
  • KC3ZBI, Ron:
  • N7JMS, Jon:
    • Got some new countries on FT8/FT4
    • Building a 10M loop antenna
    • Is there any C4FM or Fusion available in the Harrisburg area?
      • K3DMM, Denny: 447.925
21  technet  net  ka3tkw 

21 Tech Net: 2024-12-01

My Week in Radio

  • I used N3KZ 440 repeater in York from Lancaster
    • always surprised on their range.
    • thought UHF didn’t go far.
  • I built an Allstar node from a PI 4 and a USB-C radio dongle to reach a fringe repeater.
  • I’m looking forward to FT challenge
  • I stumbled into and recognized some Olivia-8/250 on 20M, and some SSTV
  • I’ve been hearing lots of ISS repeater traffic at convenient times on my good ol’ 1/4 wave antenna in the tree.
  • I got the radio blog up-to-date with all my adventures.

Others

  • 145.010 packet repeater
  • K3EA, Greg:
    • No contests this past weekend
    • Next weekend:
      • ARRL 160m CW at night
      • FT challenge - normal exchanges
    • December 14-15
      • 10m contest, phone/CW, 48 hrs, should be great.
    • https://contestcalendar.com
    • Propagation should be normal and above normal
  • WB3LNY, George:
    • Working on ISS access.
  • KA3TKW, Tom:
    • ARISS mission 1622UTC, 145.800
    • New satellite on Nov 4, AO-123, ASRTU, FM, 4-day pass
    • Easy satellites
      • ISS: 145.800FM, 145.825 packet, 437.800FM downlink
      • AO-123, 435.400FM down
      • SO-50, 437.795FM down
  • K3DMM, Denny:
    • Travel and simplex contacts
  • K3AQ, Kenny:
    • New laptop from Best Buy to run fldigi, etc.
  • KB3MIJ:
    • Some fldigi on HF
    • Some repeater work at reesers.
  • W3MW, Don:
    • Most bands on a vertical antenna.
    • Mounting some antennas on the roof with a contractor.
    • Built some more receive pre-amps.

Swap and Shop

  • VE3HOH, Pete
    • Rohn 25 sections + brackets
    • 8 yagis for 432.
    • Kushcraft yagi for 2 meters
  • KA3TKW, Tom:
    • Cheap UHF radios
    • CMD-1550
    • Shortwave receivers
21  net  technet  ka3tkw