QRP Labs QCX+ firmware v1.00a

QRP Labs · Released Aug 28, 2017 · First seen Sep 7, 2026

Source: qrp-labs.com

v1.00a is not the latest firmware for the QRP Labs QCX+: the current version is v1.09a (April 28, 2022). Go to v1.09a

In short — summary by updatemystuff.com

Eliminates power-up and menu-exit audio thump, fixes sidetone volume problems

  • CW Offset parameter accepts additional digit for WSPR reception
  • Fixed settings save bug
  • Sidetone volume no longer varies randomly or fades out

Written from QRP Labs's release notes, which are printed in full below.

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What's in this update

  • CW Offset configuration parameter now accepts an additional digit,​ e.g. 1500Hz for WSPR reception
  • More frequent polling of paddle inputs (worst case interval is now 66us)
  • Bug fix: Remove huge painful thump on power-up, and on exiting the configuration menu
  • Bug fix: sidetone issue with random alternating high/low volume when sidetone volume was not 99
  • Bug fix: sidetone volume trail​ing off over the course of a few seconds
  • Bug fix: After factory reset, next time you entered the menu you were in item 7.1, rather than 1.
  • Bug fix: "Save settings" did not work properly

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Other versions for this product

See the full firmware history for the QCX+