dm-507 cb microphone to baofeng (uv5r, etc) kenwood style speaker mic socket o wire colors -------------- dm-507 - kenwood connector PTT red - blue yellow - yellow MIC ground/bare - yellow white - red EXTRA blue - nothing x opposite of PTT, "normally closed" nothing - green x power? transmit LED? o basic instructions --------------------- borrow a "kenwood style" connector from a cheap baofeng hand mic (these are garbage, i'm guessing that's why you're here) and cut the tip and ring from the 2.5mm plug with side cutters, leaving only the sleave - use care! (or instead of cutting, work a 3.5mm socket in for headphones or an external amplified speaker, but note the internal speaker will be disabled while your frankenstein mic is connected) from what testing i've done locally, this setup (ie: dm-507, haven't tested others) sounds fantastic. other cb mics will likely work, but you will have to determine the wire colors for them on your own, or if you're lucky, find them on the internet. it is fairly easy to do so with a multimeter. for example, attach an alligator clip from your multimeter to one of the wires, let's say the red one like the above mic, and connect another alligator clip from the other lead to each of the other wires one at a time. press the PTT button a few times to see if the multimeter shows a resistance (or use the continuity tester if your multimeter has one). test the wires one at a time until you find the correct ones. the microphone will likely be easier because it is often wrapped in the braided wire. cb sites often call this "modulation." you can also tape down the PTT button and test for the mic. when the multimeter is connected briefly to the two microphone wires, it should make a slight crackling sound. hopefully this has been useful. :) 73 W0ASM here's mine:(c) 2015 Alexander Grotewohl