Thanks People; But why would one care about annular ring on a non-plated hole? IPC-D-275 Table 5-11 IPC-2221 Table 9-2 > -----Original Message----- > From: Richard P. Janda Jr. [SMTP:[log in to unmask]] > Sent: Wednesday, April 15, 1998 1:00 PM > To: DesignerCouncil E-Mail Forum.; Uptain, George > Subject: Re: [DC] IPC-T-50 > > Supported hole is plated. > Unsupported hole is not plated. > > ============================================ > > > Uptain, George wrote: > > > > Greetings; > > Would someone with a copy of IPC-T-50 please tell me what the diff > is > > between an unsupported hole and a supported hole? > > Thank you > > > > -- > ============================================================ > | Richard Paul Felix Janda Jr. | E-mail . [log in to unmask] | > | CRAY Research/SGI | Voice # . (715) 726-5885 | > | 1168 Industrial Blvd. | Fax # . (715) 726-4345 | > | Chippewa Falls, WI 54729 | Office . HREB Room 261 | > ============================================================ ################################################################ DesignerCouncil E-Mail Forum 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 DesignerCouncil <your full name> To unsubscribe: SIGNOFF DesignerCouncil ################################################################ Please visit IPC web site (http://jefry.ipc.org/forum.htm) for additional information. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ################################################################