Why are you concerned about the 100 ohm resistance value? 100 ohms is compatible with virtually every MC cartridge. Dennis Had has addressed this issue in designing the unit.
He will certainly respond to any questions you may have regarding this. See PH-302 review below.
http://www.positive-feedback.com/Issue13/cary302.htm
He will certainly respond to any questions you may have regarding this. See PH-302 review below.
http://www.positive-feedback.com/Issue13/cary302.htm