Hi Franco
If you are looking to connect a microham microkeyer to the 847, I have a DB39 cable for the FT847 that I am willing to sell, as?I am not using my 847 at the moment. The microkeyer is a very good addon to the 847, particularly since the radio does not have USB connectivity. You can check out the microkeyer at www.microham.com.
Contact me off list at joe at laferla dot ca.
Joe VA3JLF?