I think it might be like some other exports, remove the 10 ohm resistors that might be the mod, I don't know though. Also the solder bridge towards the front of the radio might be part of it too. Wish I had a straight forward answer for you.It's set up like the ol general lee and the 33hp2 with the 4 10 ohm resistors on the top of the main board
This radio seems to be a tougher one… not much info out there on it!one other guy did his 44 mod the way it shows for the 55 radio and he said it worked on his radio off another forum. that is why I told Zen to look at the radio list and see which one had the same layout his did. he has the radio in front of him to look at. I do not, so left him the list of all of them.