Mellotronists

Hi all,

I'm new to the group and am a huge fan of the Mellotron.....
have been since I heard my first Moody Blues album "back in the day."
I play keyboard and had to buy the "M-Tron", which is a "Virtual 
Mellotron".(link below)
http://www.m-audio.com/products/en_us/GForceMTron-main.html

It's about as close as I'm going to get to the real thing however,
I would like to know how Mike Pinder got all those low notes, and was
 he using more Chamberlin sounds in combination with the MK.2 in the 
early days?
I heard that on "The Seventh Sojourn,"he used a lot of Chamberlin.
I think that that album has some awsome "Tron" on it.

Thanks,

Fretless