+ AA6YQ comments below
As I recall it was much earlier CHIRP versions that wrote the EEPROM and risk bricking the FT-857D and perhaps the FT-897D as well. Have no knowledge of HRD causing any such problem. At the time this surfaced CHIRP quickly modified their app to correct the memory write algorithm.
Regards, My FT847D manufacture date is in the first "D" model batch and still ticking without performance problem. It does have one pixel wide vertical streak on the screen at cold boot that disappears after thorough warmup. May all have an enjoyable Thanksgiving celebration, Phil / K4PO
+ The early version of HRD was the first CAT control application to exploit the work done by KA7OEI that revealed undocumented "read EEPROM" and "write EEPROM" commands, and reverse engineered the EEPROM locations:
+ It didn't take long for the FT-857 and FT897 EEPROM locations to be similarly reverse engineered.
+ As a professional logic design engineer, it was obvious that the "write EEPROM" commands were going to exhaust the chip's write budget (1 million), but my warnings were ignored. As a result, several hams now have nice-looking door stops.
73,
Dave, AA6YQ
