W3GMS Monday Night Workbench Net

June 16th 2025 #256 - Coax and Microphone Projects | W3GMS Workbench


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Host: Greg (W3DIB)
Theme: Field Day Prep, Coax Projects, and Microphone Cable Woes

đź”§ Technical Questions

Q1: Straightening Coiled Mic Cables (N3RBN)
Paul asked if there’s a reliable way to straighten the coiled section of an RJ-style microphone cable to reterminate it. Responses included:

  • Chuck (NA3CW) and others suggested buying a cheap knockoff mic just for the cable, then rewiring.
  • Scott (W3KZG) seconded the idea—some knockoffs fit well and don’t even require soldering.

Q2: Remote Relay vs. Direct Coax Run (KC3SQI)
Wayne asked if it’s better to run a home-run coax for a 2m antenna or share a remote relay rated only for 6m.

  • Ron (WA3VEE) and Jim (KC3RFG) strongly recommended running dedicated coax to minimize signal loss and prevent mismatches.
  • John (WA3KFT) shared his experience running 14 coax lines with high-quality switches, warning about specs and reliability.
  • Consensus: fewer interconnections, always better.

📡 Roundtable Highlights

  • Field Day Fever:
    Many ops are prepping hard—testing coax, installing connectors, tuning antennas. Chuck (NA3CW) and Joe (W3GMS) led a coax connector demo that was widely praised.
  • APRS Success:
    John (KC3WWC) had a blast during APRS Thursday—received 174 messages from across the globe in 12 hours!
  • First 6m Contacts!
    Jim (KC3RFG) made his first contacts on 6 meters thanks to some recent solar activity—repaired his mag-mount antenna with a solder rework.
  • Project Progress:
    • Keith (KB3ILS) dove deep into bandpass filter design, winding toroids and using a NanoVNA and oscilloscope.
    • Scott (W3KZG) is renovating a trailer to double as a field day camper and ATV hauler.
    • Wayne (KC3SQI) poured concrete for his new tilt-over mast.
    • Ron (WA3VEE) helped tune the 40m dipole for Field Day, now resonant at 7.150 MHz.
    • Jon (WA3KFT) shared a robust setup with 14 coax switches and specialty tools from DX Engineering.

đź’¬ Community Notes

  • Health Check-Ins:
    The net closed with updates and well-wishes for an operator dealing with a medical emergency—several ops shared hospital updates and encouraging words.
  • Father’s Day Recaps:
    Several shared heartfelt stories of family time—steak dinners, grandkid babysitting, and “gifts” like temporary pet duty.
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W3GMS Monday Night Workbench NetBy W3GMS