Thanks Skipp and Marv. I have a "Spectra Tac Line Driver Equalizer" TRN6552A1 and an "Encoder Module" TRN6085B1 with the momentary high and low tone switches on the front. It appears that all I may need is the Spectra Tac manual for these. Al Hajny WB9LIV Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/