I have an excellent condition Argosy 525 for sale. It has the 223 noise blanker and the 226 calibrator. Also, the 224 8 pole 2.4 filter and the 218 1.8Khz SSB filter. PTO is smooth and receiver is very hot. I also have the matching 225 power supply. It can be run either as 50W or 5W. It is a great QRP rig. Includes original manuals. $250 plus shipping from 03858