• You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
  • The Feb 2025 Radioddity Giveaway Results are In! Click Here to see who won!

Reply to thread

Sorry one more thing. The 99v should not need a switch to shut off the talk back. It should turn off on it's own when the echo/robo/vc control is turned off. My guess is that the original echo board went at sometime and someone introduced a new echo board. Mine is has failed. I am hoping the local electronics shop has a chip reader and will go after it that way. I hope you can get this going because the 99v is IMO the gold standard for Big Radio.