Crystal balls mic

[christian.laferriere@xxxxxxxxxxxxxxx (Christian Laferriere)]

fm: christian.laferriere@xxxxxxxxxxxxxxx
Subj: Crystal balls microphones.

I recently bought a new Astatic M-127 crystal element to replace my
old controlled reluctance element in my Sure 707-A mic. When looking
at Kevin's harps catalogue, I noticed that there is a (supposedly) better
mic called the Crystal balls which is currently being used by the likes
of Gary Primich, Rick Estrin etc.
I understand that the makers of this mic use the standard JT-30 mic
element, but  perform some electronic "Magic" with it. Now I have been
debating this with a technician I know and although the advertisment
says that with this mic they have boosted mid and high frequencies while
increasing the overall gain (apparently without a battery), my tech friend
says that they probably just used a notch filter to knock down the lower
frequencies and then the user turns his volume higher.

Can anyone comment on this, does anyone know how to modify a JT-30 to get
an even better sound (although I think it is impossible to get any better).

As well, What kind of potentiometer would you put on your mic for the best
control.
I have used a 25k Ohm mini-pot but find the fine tuning difficult. I am waiting
for the local shop to get its shipment of 250k Ohm mini-pots to see if I
can get better control with one of them.
If any of the readers have electronic "tips" for the mic modifyers around, they
would be appreciated.
Thanks

Christian Laferriere
Gatineau, Qu?bec
CANADA
christian.laferriere@xxxxxxxxxxxxxxx
73052.1173@xxxxxxxxxxxxxx