I have checked each of the 3 GM300's I have and each of them goes from 0vdc low (lead open not connected to RTCM) and 13.82vdc HI. This is right off the Accessory plug pin #4. Radio programmed for PL/DPL & CSQ Det. Bill Hurlock -----Original Message----- From: app_rpt-users-bounces@ohnosec.org [mailto:app_rpt-users-bounces@ohnosec.org] On Behalf Of app_rpt-users-request@ohnosec.org Sent: Friday, May 10, 2013 12:00 PM To: app_rpt-users@ohnosec.org Subject: App_rpt-users Digest, Vol 51, Issue 9 Send App_rpt-users mailing list submissions to app_rpt-users@ohnosec.org To subscribe or unsubscribe via the World Wide Web, visit http://ohnosec.org/cgi-bin/mailman/listinfo/app_rpt-users or, via email, send a message with subject or body 'help' to app_rpt-users-request@ohnosec.org You can reach the person managing the list at app_rpt-users-owner@ohnosec.org When replying, please edit your Subject line so it is more specific than "Re: Contents of App_rpt-users digest..."