My databook suggests BF199 or BF224 as pin-for-pin replacements for the '311. The blue dot most probably is a hfe group. In former times, some manufacturers measured their parts and gave them coloured spots according to which range the measured value (often hfe) belongs to. You bought these transistors with the colour mark when new, noone else put them there. later they changed to A/B/C or -6/-10/-16/-25. Japanese transistores still use this system, but they don't put the colour on their devices any more and use the first letter as abbreviation instead: Y (yellow), B (blue), G (green)...
Steffen -- Author: Steffen Maisch INET: [EMAIL PROTECTED] Fat City Hosting, San Diego, California -- http://www.fatcity.com --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
