Group, If anyone has an RT-22A/APX-1 or whatever RT was used with AN/APX-1AM, I need to know whether the HV supply was 18 volt dynamotor or 400 CPS rectifier. Likewise R-144/APX-13 and T-124/APX-13. Robert Downs - Houston <http://www.wa5cab.com> (Web Store) MVPA 9480 <wa5cab at cs.com> (Primary email) <wa5cab at houston.rr.com> (Backup email)