[TowerTalk] HAM III x HAM IV and others

[PY1KS - Alex]

Hi guys,

A friend of mine offer me a HAM III just used for 3 years only, and I got a
HAM IV not so good condition, in fact, I don´t know if it's working
effectively. And I wonder if YAESU G-800DXA or G-1000DXA would be
better but, one of these 2 rotors I will need to import from U.S.
Any help? Does anyone could tell me the diference between the HAM III x HAM
IV?
TIA

sry my english.

-- 
73's

PY1KS - Alex