Electrical connector

An electrical connector comprising:

• an insulative housing forming opposite first and second receiving cavities in a vertical direction, each of said first and second receiving cavities forwardly communicating with an exterior in a front-to-back direction perpendicular to said vertical direction;
• a plurality of first passageways formed in the housing and extending along the front-to-back direction;
• a plurality of first deflectable curved contacts disposed in the first passageways, respectively, and extending into the first receiving cavity, each of said first contacts including a front contacting section, a rear tail section and a middle retaining section therebetween in the front-to-back direction;
• a plurality of second passageways formed in the housing and extending along the front-to-back direction;
• a plurality of second immoveable contacts disposed in the housing and extending around the second receiving cavity, each of said second contacts including a front contacting section, a rear tail section and a middle retaining section therebetween in the front-to-back direction;
• and
• an insulative spacer attached behind the housing to regulate the tail sections of both said first contacts and said second contacts in a transverse direction perpendicular to both said vertical direction and said front-to-back direction;
• wherein
• each of said first passageways is dimensioned much larger than the corresponding first contact in the vertical direction for allowing forward insertion of the said first contact thereinto from a rear side of the housing, and said spacer includes a plurality of insulative members inserted into rear portions of the corresponding first passageways, respectively, for adjusting impedance of the corresponding first contacts, while the second passageways is dimensioned to be similar to the corresponding second contact in the vertical direction without any insulative members inserted therein;
• wherein
• the middle retaining section is located around a middle level of the corresponding first passageway in the vertical direction.