Magnum 257HP and Uniden wireless mic

[camaro1]

so I picked up a uniden / bearcat BC906W wireless mic and started looking at some of the other radio's that use uniden and the new president version of the BC906W mic, looking at some of the president 6 pin radio's and they match the magnum 6 pin wiring,, so I plugged in the uniden BC906W to the magnum 257hp. the mic and speaker of the radio had a very loud feedback noise(varied with the mic gain on the radio) but did function sort of, ya!

so now to find out why,, its so close to working correctly,, I pulled the BC906W apart to see how it was wired and one thing that looked odd was at the mic plug pin 1 (audio) had the center wire of the shielded wire and the shield both soldered to pin 1, I removed both of them from pin 1 and the noise stopped, I soldered just the center wire from the shielded audio wire to pin one and re-tested,, mic works great!!

so to recap if you want the BC906W to work on the magnum 257 radio's just take the mic plug apart and disconnect the shield from pin 1 (I just unsoldered it and folded it back and put a layer of tape over it and re-assembled the mic plug)


pin 1 audio and shield (remove shield braid from this pin)
pin 2 transmit
pin 3 receive
pin 4 -------
pin 5 ground
pin 6 b+

been playing with the mic for the last hour or so, it has some good distance, I can cover my front and back yard without losing signal to the mic/speaker

got the mic from a guy on ebay selling them for $79 shipped, cheapest I have found them.

 

[Lil'Yeshua]

I know videos make them sound awful but how does it sons to you?

 

[camaro1]

the receive is ok, transmitt is not as good sounding as my other mics, I might try a different element in it, found some links to others that have changed out the element and the sound was much better

im also making a adapter box for standard 4 pin radios, its almost done just waiting on a 6pin male sockets, it will have a 4 pin plug on it also so I can have my regular mic plugged in along with the wireless, ill post up some pics when its done

distance is great, I took a walk to the end of my block and still had signal

 

[disscoduck]

mic adapter

did ya have any luck on making the adapter? I was thinking that I might just convert one of my radios over to a 6 pin setup . and I was wondering what kind of voltage the receiver needed for voltage and if it needed to be reduced from 12 v . if it doesn't .. maybe I can just wire the radio like a president or a uniden style and then it will be pnp. any thoughts

 

[222DBFL]

Any updates camaro1, this would be a good answer to the mobile setup for me if the mic sounds good. I have a 2018 that if needed I will transfer the element from it to the uniden mic. Just am curious if it's worth the coin??

 

[camaro1]

gave up on it for now, the wireless mic just didn't have a good sound to it, even tried a couple different elements in it.

 

[222DBFL]

Thanks camaro1, that's what I needed to know