[Icom] IC-V8 mic connector

[Mike Miller]

I just bought an IC-V8 HT. Being cheap I bought an MJF-295I 
speaker mic rather than the Icom model. The MJF only has a 2 
conductor mic plug while the Icom has a 3 conductor plug. The 
guy that sold me the radio said not to worry, but the MJF mic 
only lasted a day before keying up the radio without my 
permission and then refusing to key the radio at all. I'm 
currently using a Motorola FRS speaker mic which also has a 2 
conductor mic plug and it is working fine so far.

What is on the ring terminal of the mic jack? Am I going to 
damage the radio by shorting the ring to the sleeve by using a 2 
conductor plug?

Is there a schematic of the mic and speaker jacks on the web 
somewhere and why doesn't Icom include a schematic in the 
manual?

Thanks,
Mike  KC9DOA