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Chameleon Knowledge Base · The Complete Online HF Antenna Handbook

Why Does My Computer Reset When I Transmit?

A computer that resets during transmission is usually reacting to RF entering power, USB, network, display, or chassis paths—or to a power-supply voltage problem under RF load.

Troubleshooting RFI & EMC Reviewed 2026-07-14
In plain language: A computer that resets during transmission is usually reacting to RF entering power, USB, network, display, or chassis paths—or to a power-supply voltage problem under RF load.

Why an operator notices it

The useful clue is repeatability: which band, power level, mode, and cable arrangement triggers the reset. That pattern can distinguish radiated pickup, conducted RF, common-mode current, and ordinary DC power trouble.

Decisions that matter

  • Test at the lowest power that reproduces the problem.
  • Check station DC voltage and grounding before assuming RF.
  • Identify every cable connected to the computer and remove nonessential paths one at a time.

A useful field check

  • Restore the antenna return system and feed-line choke placement.
  • Shorten or reroute vulnerable leads.
  • Apply appropriate common-mode suppression at the entry point after the path is known.

Common wrong turns

  • Clipping one ferrite onto every cable without diagnosis.
  • Continuing at full power.
  • Ignoring a weak power supply or shared AC circuit.
Technical foundation

This lesson translates established transmission-line and antenna practice into a field decision. Use the current equipment datasheet and Chameleon product guide for changing loss, power, connector, installation, and compatibility limits.

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