diff --git a/NXDNTX.cpp b/NXDNTX.cpp
index 23ed5d4..495a46f 100644
--- a/NXDNTX.cpp
+++ b/NXDNTX.cpp
@@ -157,7 +157,7 @@ void CNXDNTX::writeByte(uint8_t c)
 
 void CNXDNTX::setTXDelay(uint8_t delay)
 {
-  m_txDelay = 600U + uint16_t(delay) * 12U;        // 500ms + tx delay
+  m_txDelay = 300U + uint16_t(delay) * 6U;        // 500ms + tx delay
 
   if (m_txDelay > 1200U)
     m_txDelay = 1200U;