Jim, It depends on what kind of comb pattern you are looking for. The most common is found on the IPC-B-24 test board. Four comb patterns, 16 mil lines, 20 mil spaces. I get ours from Diversified Systems in Indianapolis (http://www.divsys.com/servicesproducts/pcb/ipcboards/IPCBoards.asp) who also carry a variety of other IPC test boards, also having different comb patterns. If you can be more specific on what you need the comb patterns for, I can help more. Doug Pauls Jim Smith <jsmith@EMSCIENCE S.COM> To Sent by: TechNet [log in to unmask] <[log in to unmask]> cc Subject 09/14/2005 12:33 [TN] Comb Pattern PCB AM Please respond to TechNet E-Mail Forum <[log in to unmask]> ; Please respond to Jim Smith <jsmith@EMSCIENCE S.COM> Hello, all. Does anyone know of a supplier with stock comb filter pattern PCB's for SIR testing? Thanks in advance for the help. Best wishes, Jim -------------------------------------------------------------------------- Jim Smith Managing Director Electronics Manufacturing Sciences, Inc. 4285 45th St. S. St. Petersburg, FL 33711-4431 Tel: (727)866-6502, Ext. 21 Mobile: (727)542-0789 Fax: (727)867-7890 E-mail: [log in to unmask] www.emsciences.com --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------