Unfortunately, The only mechanical PV I have is a Reo Grand, and I can't seem to get the Penelope on there with the depth of that juice cup. and I don't have any adapters. I do have a regular Ego battery, and while I know that's not a purely mechanical PV, it is a true 3.7 volt device, so PWM shouldn't play a part. I just tried it and it provides an identical vape. I don't have a multimeter, but now I'm considering getting one. The connections I make, however, are pretty solid, so I really doubt it's a connection issue on my part. Also, I've been getting virtually the same vape on every coil I make, I've made about 8 coils so far. Also, I do have a very simple volt meter, the kind that screw into atomizers and devices, and it gives me a solid 3.9 volts on my VW device, but it won't give me a reading on my ego batteries.
I'm vaping Gandalf at 80/20 pg/vg, 24mg strength.