got my knockoff microdot to TA5F adapters
https://www.ebay.com/itm/YAM-C5L-B-Microdot-Adapter-FOR-DPA-Fits-Lectrosonics-Bodypack-Transmitter/181444266441 ($30 knockoff of $100 DPA DAD3056 - there wasnt really a spec or wiring diagram given, but a measurement shows this particular one has 3.9K resistor on pin 3,and pins 2&4 shorted as expected to give 4V servo power)
I did some tests of various setups to assess noise floor
I set up a mic stand in my living room in a triangle with a stereo pair of monitors and did 3 setups:
A: dpa 4061>d:vice (reference since that equipment is designed by the mfr to be used together, d:vice should provide full 5V power to 4061)
B: dpa 4061>microdot to TA5F adapter>SPDR (SPDR only puts out at most 4V to 4061, which is lower than its 5V spec. will it affect the sound?)
C: MK4V>CMR>SPDR
i matched levels as close as i could by eye on a dynamic passage. did 3 songs and resulting waveforms looked like
A:d:vice gain at +20dB and metarecorder levels at 75%: peaked at -10dB
B:dpa>SPDR input level set to 31, peaked at -8 dB
C:mk4v>SPDR input level set to 35, peaked at -12 dB
when normalized to same level, and looking at the "quiet space" between songs (room noise of my DVR, refrigerator, etc)
A.dpa>d:vice noise level -72 dB RMS
B.dpa>SPDR noise level -66 dB RMS
C.MK4V>SPDR noise level -72 dB RMS
my read is that the actual room was ~-72dB, but the DPA>SPDR had higher noise for one of two reasons
-mic output (relative to self noise) is reduced because of being powered below voltage
-using mic-in on SPDR instead of line-in like the schoeps (less likely as my previous tests of CMR in mic-in and line-in were not that different)
using 3V 4063s instead of 5V 4060/4061 would likely solve this issue. i have not determined if the 4061s at lower voltage have reduced max SPL but this would not surprise me. in these moderate-volume tests they sound identical to my ears
ill try to do some tests with sine waves at high spl and see if i can visually see distortion