Hrvoje

Sounds perfectly good to me. As long as you connect to L to the same contacts both on microphone and recorder connector (as well as the remaining R) it is fine, since you did nothing to reverse them. From the image you supplied it is clear that you connected channels in the same order to both connectors. Yes, BATT NEG should be connected to the third contact on both MIC and REC connector. Circuit has to be closed if you want the flow. Not sure. As far as I understand it, this is just about powering the microphone. Recorder should not be affected at all as far as recorder side contacts are separated from the power source by capacitors, and that is the case. Finish it up, test it and give some feedback please. Hrvoje

Build one yesterday, recorded with it today. Works great! Thanx for detailed instructions. I think I'll make few more just for fun.

Thanks! Now I have a part number and all the specs needed. You've helped me a lot.

I bought the SONY MZ-R700 on the used equipment market, but no wall charger came with it. My question is can wall chargers for newer (currently available in stores) units be used with it, so I can buy one from local Sony dealer as a spare? If not, what is your advice? I guess that connector type, polarity and output voltage must match, but unfortunately I have nothing to compare it to. Thanks.