+ AA6YQ comments below
Because new HRD Radio Control looses some control buttons and radio control sliders totally, I have been using an old version HRD(627) with my 857D.
I was told today that old version HRD may damage 857 (memory device). My use of 857 is primarily for CW, FT8, and VHF/UHF FM, and HRD is just handy to control the rig.
Do anyone have such bad experiences with 857 and HRD Radio Control?
+ The FT-857's Electrically Erasable Read Only Memory (EEPROM) is only guaranteed to support 1 million write operations. Years ago, Yaesu announced that they are unable to obtain replacement EEPROMs, so if your FT-857 fails, it will not be repairable.
+ Transceiver control applications that employ undocumented CAT commands to modify the EEPROM can cause it to fail.
+ The same problem exists with the FT-817.
73,
Dave, AA6YQ (logic design engineer)
