Hi everyone,
I bought this Icom IC290a 2 meter all mode radio a little while ago . The radio has sideband in it , but it doesn't have tones for accessing the repeaters that use tones . So I bought a tone board to install in it . When I opened it up, I found this little board in the picture on the bottom side , at the back left corner near the coax connector . It doesn't seem to have any apparent effect on how the radio operates , and I've been searching through all the mods that I could find online trying to find out what it's suppose to do . But I haven't been able to find anything yet . So I decided to take a picture of it and see if anyone here might know .
I bought this Icom IC290a 2 meter all mode radio a little while ago . The radio has sideband in it , but it doesn't have tones for accessing the repeaters that use tones . So I bought a tone board to install in it . When I opened it up, I found this little board in the picture on the bottom side , at the back left corner near the coax connector . It doesn't seem to have any apparent effect on how the radio operates , and I've been searching through all the mods that I could find online trying to find out what it's suppose to do . But I haven't been able to find anything yet . So I decided to take a picture of it and see if anyone here might know .