I don't know, I've not opened it. It's in a rather large (40mm diameter) shield, so it could be a larger core than usual.Marik said:Is it a two bobbin transformer, or a small EI? In the last case I have very hard time understanding how they managed to squize those specs.
The magnets are about 50mm long, about 4mm square section, seem to be glued on the vaguely elliptic steel frame. I have Nd magnets 15mm diameter 3mm thick that have considerably more pull than those in the mic.The magnets in those mics are Neodymiums and should give about 35000Gauss (0.35T). The only way for Nd to lose magnetics is to heat it. I highly doubt the mic would withstand it without showing the traces... unless they installed them this way.
At the moment, the only ribbon I could compare it to is an M160 (the other is an active Sigma). The Rb500 seems weak in comparison. Next week, I'll have the new AT ribbon mics, a Royer 121, a Melodium RM6, I'll do comparisons.You say it gives very low output, do you have some other ribbons to compare to?
I'm due to go to New York next month, I could ship them from there.Obviously, something going on there. If you get stuck with this mic, would you mind sending it here for me to check it? You really picked my interest with this one!