Hi,
I did a quick check of the group and found this:
/g/ft817/topic/44934259Same symptom, but some interesting responses so take some with a grain of salt.
It sounds like a PLL unlock issue (though for this issue the unit should respond with an UNLOCK error message); that would require alignment (and sufficient test equipment - see the technical supplement).
Since this is occurring on TX only I would look for current starving of the power supply, voltage drop across the power cable, or defective power plug.
It is important that you indicate failure with no battery installed; as I recall my FT-817ND really prefers a battery installed even if the battery does not hold charge.
Lastly you need to do all troubleshooting with a dummy load attached; a 10W dummy can be constructed with common carbon composite resistors in parallel or purchased off eBay for about $20 USD (you might need an adapter/cable to get to PL-259).
Doug. K4DDM.
