What about a hose clamp with a standoff ? (ne Schlauchschelle ausm Baumarkt mit Abstandshalter, Loch gebohrt und am Rand der Schlauchschelle festgemacht)
For what do you need it? handcuff-diy project? :green:
found some time to finish the mics...
the m70 capsules need lots of polarisation voltage to compensate for less sensitivity compared to other capsules. it seemed to run fine on 130v, though i am not sure if they can stand a close up snare without the diaphragm beeing sucked to the backplate with such high voltage.
i also want to use the beyerdynamic mk703 and akg capsules with the mic bodies, so i plan to make the polarisation switchable (60&120v)
circuit is pretty standard: ef86 hooked up as triode g2&g4 to plate, 180volt B+ to 120k plate resistor, 1,6k cathode resistor bypassed with 330µF. 1:10 beyerdynamic output trafo.