Steve: I understand your delema!!! Been there experienced that. Here is what I have found out of Mil-Std-2000A Section 5.1.3: Solder pot and solder bath temperatures. The solder pots used for cleaning and tinning of areas to be soldered, drag soldering pots, and wave solder baths shall be temperature controlled. Solder pots or baths shall be set at a preselected temperature within the range of 245 degrees C to 275 degrees C or 475 degrees F to 525 degrees F. The temperature shall be maintained within +/- 5.5 degrees C and +/- 10 degrees F of the preselected temperature. This is ancient news and has been used for a long time. The only glitch in this is the fact that if you are using tinning oil, if you get at or above 520 degrees F you may have a oil fire on the pot. That's another story. I do not have the IPC Spec on solder pot bath temp and the +/- allowed. Perhaps someone at IPC who is watching the TechNet Channel can interject with the IPC Spec. Ron Hollandsworth ############################################################## 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. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################