C : Very Good -A few scratches but looks good. A few scratches that are not visible unless you look closely. Please check the photos for detailed conditions. This is an advanced amplifier that outputs 500W at 100VAC and can be used up to 3.5-29MHz. The input can be up to 100W, but since the tubes are of good quality, the output power is more than 500W (actual measurement is about 560W).
With the addition of a cooling fan, there is no need to worry about thermal runaway. Operation has been confirmed by dummy load test. Everything you see in the photos. B : Excellent - Beautiful item for used. E : Imperfect -There may be a problem or shows sign of age. F : For parts or not working, untested, only powered on, needed maintenance, etc..