Ed, There is a TM 11-5820-806-14 listed on the LOGSA web site for the GRT-21 & 22. Unfortunately is is a "D" classification and not available for download by we non-priority civilians. 73, John, W4NET Subject: [Milsurplus] AM-6154 manual needed > Hi Gang: > I am looking for a manual on AM-6154 / GRT-21 > Any help will be great > Ed > WA3BZT >