I have been trying to use a turner +3b with my 2510 and most contacts say the audio is not right. I have it turned way down about 8 or 9 o-clock on the tone setting. I have gone back to my stock mic and get better reports. I wonder if some of the electrolytic caps may be going bad in the turner. I always thought they worked good on ssb. I guess also they may not work good on some radios.