985 Workbench: 2025-09-15

My Week in Radio

  • seeing more “alternate” FT8 traffic on the waterfall: dxpeditions and contests!
  • tempted to replace my old cheap coax with something lower-loss for my 50W VHF to compare.
    • bust out the attenuators and the tinySA or maybe just the little digital power meter I have to measure at the antenna feed point.
  • bring a wire and a whip to demo the Nano VNA before or after breakfast.

Others

  • WA3CRW, CR:
    • working with W1RC to do some WIRES-X
  • W3JAM, Jeff:
    • Simplex Net
    • Central PA Skywarn Net
    • Heathkit 102 on the workbench for refurbishment
    • amplifier and odds and ends to fix and sell
    • looking at antennas to mount on the barn
    • rebuilding a 16 element yagi for more convenient deployment/tuning
  • WA3VEE, Ron:
    • won’t be at breakfast, but Antique Radio Show instead in Kutztown
    • Red Rose Repeater Hamfest coming up on Oct 4.
    • has some gear from some other people to unload
  • KB3ZIM, Bob:
    • wondering about 160m antennas:
      • been meaning to launch an antenna every year this time of year.
      • maybe inverted L.
    • IC-7100: radio in 2 pieces, so you don’t need so much at the control head.
      • using a 75-foot cat8 cable for a really long run between TCVR and head.
      • run to the gazebo to operate outside but high power if he wants.
      • lots of fun chasing on all bands.
  • KC3YSM, Steve:
    • building a go-box
  • WA3KFT, John:
    • 6m SSB nets
    • antique wireless net on sunday
  • W3MFB, Mike:
    • VHF contest. spoke to someone randomly.
    • working some special events and pota stations
  • KC3OOK, Bill:
    • working at Joe’s on antenna
  • KC3SQI, Wayne:
    • moving antennas to the new mast
      • 2m operational
  • KD3AIS, Tim:
    • collecting equipment to put radio in truck
  • KD3APR, Paxton:
    • coming in on an HT
  • AA3LH, Leon:
    • feeling better today
  • AF3Z, Jim:
    • normal CW sked

Questions

  • KD3EE, John:
    • I have my 50W mobile radio, home-built YAGI, 75ft cheap coax in a couple connected sections. How should I evaluate this system?
    • WA3VEE, Ron:
      • check that the antenna is matched with the nanoVNA: SWR
      • have people on the repeater talk, so I can point for maximum signal
    • KC3SQI, Wayne:
      • with nanoVNA, calibrate at the nanoVNA, then move calibration load to end and use a through-measurement to see loss in coax.
    • AF3Z, Jim:
      • bury-flex is a good deal
    • KC3SQI, Wayne:
      • if you’re going to an LMR type cable, should good with bury-flex, since the outside doesn’t allow moisture. they use glue between outside braid and the seal. bury-flex will need heated a little to force the crimp end underneath the braid
      • buryflex is available at ham radio outlet.
  • KB3ZIM, Bob:
    • What are some 160m antenna options?
    • height and length is a challenge.
    • aiming for an inverted L, but the radials will be a challenge.
    • W3GMS, Joe:
      • 240-foot wire, 60ft in the air, fed by open wire line
      • 3/8-wave would need less radials
        • could be end-fed or inverted L
        • not balanced, so noisy
        • will need a tuner to match
      • 1/4 wave would need extensive radials
    • KC3NZT, Harvey:
      • $150 automatic tuner outside. tunes anything.

See also