GP300 on 433Mhz?!

asdfg · Post by **asdfg** » Tue Apr 04, 2006 4:16 am

Hi! How to make Gp300 UHF on 433MHz, when it is in original 438-470MHz!

va3wxm · Post by **va3wxm** » Tue Apr 04, 2006 6:38 am

You could try the "pressing-the-shift-key-while-entering-the-numbers" hack in the RSS.

The radio and/or the software may or may not accept the entry though.

asdfg · Post by **asdfg** » Tue Apr 04, 2006 11:17 pm

It simce to me that go on 434MHz on that way, and wont go to 433MHz. It is GP300 5-tone UHF radio.

va3wxm · Post by **va3wxm** » Wed Apr 05, 2006 4:53 am

You may be out of luck then.

You'll have to find a real 403-433 split GP300.

Post by **wavetar** » Wed Apr 05, 2006 5:25 am

You will have to modify your .mdf file, as per the instructions on Batlabs:

http://www.batlabs.com/gp300.html

Todd

f1uot · Post by **f1uot** » Tue Apr 18, 2006 4:45 am

hello all,

on the GP300 select V rss, the mdf file doesn't exist...
which version is your rss, i can send you the good modified file for your uhf

Well, with a hex edit, looking for the frequencies in hexa so you found 438000000 in hexa : 80591B1A and replace by 403000000 in hexa C04A0518, in all adress probably 4 or 8 time in the file, and restart your program!

Now you can put all frequencies between 403 to 470 MHz, 1 when you put a frequencies sometime it can beep and write "Cannot select tuning bin reference number", dont worries. now the radio can be program on all frequencies in 403 to 470, but pll can't lock on all the new split, with some tests an 433 can up and run at 443Mhz not more and an 438 can down and run at 429 or 428 Mhz

73's
Olivier

PS: date : 27/04/2006
all people send me a mail and if you not recieved replay, so send me again a mail with gp300 in subject... or PM... because i have some problem with spam
73's
Olivier