Gary, Since I do high volumes of B-24 and B-36 testing, I use connectors vs. Hardwiring. The connector I use is an AMP part number 1-111212-1. It is an IDC connector, but I solder to the contacts and use larger diameter wires. My studies show about a 0.25 - 0.33 decade loss vs. hard wiring using these connectors. The connectors run about $12-$14 each and are about a 6-8 week lead time item. I have some in stock if Charles is desperate. Since the B-24 and the B-36 have the same contact finger layout, the same connector can be used for either board. I have a few ideas on designing connectors specifically for SIR testing. Any TechNet people interested in working with me on a new connector design? Doug Pauls CSL ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ##############################################################