Changing antenna selection for FT-817

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yo3ggx
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Changing antenna selection for FT-817

Post by yo3ggx » Mon Nov 03, 2014 4:31 pm

IN order to switch from front to rear antenna, replace in the ft817.radio file (in /prxtx/Radios folder on the internal storage of your Android device) the following lines:
CMD_SET_PWR_0.5W=00,79,03,00000000,BC
CMD_SET_PWR_1.0W=00,79,02,00000000,BC
CMD_SET_PWR_2.5W=00,79,01,00000000,BC
CMD_SET_PWR_5.0W=00,79,00,00000000,BC

with :

CMD_SET_PWR_0.5W=00,79,03,00111111,BC
CMD_SET_PWR_1.0W=00,79,02,00111111,BC
CMD_SET_PWR_2.5W=00,79,01,00111111,BC
CMD_SET_PWR_5.0W=00,79,00,00111111,BC

this will always set the rear antenna.

You can combine this to select different antenna for different bands.

To better understand why this, you need to write two EEPROM locations, as follows:
'00,79' is the command to used to write EEPROM location 79 and 79+1

79 1-0 TX Power (All bands) 00 = High, 01 = L3, 10 = L2, 11 = L1
79 2 ? ?
79 3 PRI On/Off 0 = Off, 1 = On
79 4 DW On/Off 0 = Off, 1 = On
79 6-5 SCN (Scan) Mode 00 = No scan, 10 = Scan up, 11 = Scan down
79 7 ART On/Off 0 = Off, 1 = On
7A 0 HF Antenna Select 0 = Front, 1 = Rear
7A 1 6 M Antenna Select 0 = Front, 1 = Rear
7A 2 FM BCB Antenna Select 0 = Front, 1 = Rear
7A 3 Air Antenna Select 0 = Front, 1 = Rear
7A 4 2 M Antenna Select 0 = Front, 1 = Rear
7A 5 UHF Antenna Select 0 = Front, 1 = Rear
7A 6 ? ?
7A 7 SPL On/Off 0 = Off, 1 = On






You can play with the config file, to add new commands or modify the existing ones to better accommodate your needs, for any of the 5 option buttons (up to 10 buttons if Fn key is used).
This is explained in the application user guide.
The app is very flexible and allows users to change current settings or even to add new transceivers to the list of the supported ones without the need to upgrade the app.

Hope this helps. Please send me a mail if you have any issues editing the config file.

73 Dan YO3GGX

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