Hi Janus, I'm not familiar with the equipment you mentioned. I was only interested in getting audio out so I didn't try any microphones/capacitors. I wired my external speaker (earplugs) to SPRK and GROUND. I put two normal diodes in series between INT/EXT and GROUND, cathode to GROUND. A diode test...

I ordered the plug I mentioned in the non "A" version and wired it up according to info I got here and in another forum.

Works great!

I landed here looking for a plug I can use with the Radius P50 to wire it for external audio. It seems HR511-ND isn't available. I found this p/n and measured the socket on the radio. It looks like a fit so I'll order one and give it a try. HR10A-7P-6P73, available from Mouser. http://www.hirose.co....