I am looking for a small lavalier to plug directly into the Microtrack II without using a power supply, XLR adapter, etc. I want to plug directly into the 1/8" jack.

B&H sells the Sound Technologies VT506 exactly for this purpose:
microtrack | B&H Photo Video (http://www.bhphotovideo.com/bnh/controller/home?ci=0&shs=microtrack&sb=ps&pn=1&sq=desc&InitialSearch=yes&O=jsp%2Fproduct.jsp&A=search&Q=*&bhs=t&Go.x=0&Go.y=0&Go=submit)

Does anyone have experience with this mic?
I am using this on a female with high pitched voice, under clothing... so should I get the mic with a flat response or a peaked response?

Would it be possible to wire a PSC millimic or Tram for this purpose (plugging directly into the 1/8" powered jack on the Microtrack.)?

Thank you!

You should get the VT mike with the peaked response since you are planning to use it under clothing. The VT506 is very similar to a Tram. I have switched over most of my Radio mic heads from Trams to VT for durability,cost and convenience. Not sure how the powering works thu the mini on the Microtrack but I would trust B+H on this issue. Sanken heads are a little better sounding but cost substantially more. I would expect the Microtrack could power just about any phantom powered mic you have mentioned if wired properly

Thank you very much! I am doing a narrative web series shot in public locations ("tourist" style) and recording directly into the MicroTrack is very convenient.

However, with the Tram I need to plug in a 1/4" jack and also use the Tram power supply, not to mention the bulky XLR cable section.

With the VT mic going directly into the MicroTrack, I have a dream come true: a high quality (for my needs) recorder and a tiny, undercloathes mic (with vampire cage) and small cable.

Thanks again for the comments. I'll report back on how it finally works out.

I can vouch for the mic but that stereo mini connector may not provide a strong connection over time so be careful with it

I got the Voice Technologies VT506 for the MicroTrack.

It works very well. The wire has extra rubber insulation where it goes into the 1/8" hand-wired plug. I think some tape will protect the wire from getting pulled out during use.

Paired with the MicroTrack, this works very well for a hidden body-worn mic. The VT506 eliminates the extras needed to use a Tram: power supply, XLR cable, xlr to 1/4" plug adapter.

According to the specs, the power needed for the VT506 is 1.3v (0.9-20v). The powered 1/8" jack on the MicroTrack works fine.

A Tram wired properly should also be able go directly into the microtrack using the phantom from the recorder as I have both systems wired for my Lectrosonic radio mics without the XLR power supply. Just not sure anyone sells Trams directly that way

Just another vote for the VT 506 paired with a MicroTrak. I have two sets and so far am happy with them. I thought it would be easier than fooling with wireless for the relatively static situations I'm faced with.