I have an al-1500 that I converted run a gs-35b. The tube needs more cooling than the factory blower can supply. The conversion works well and I’m happy with it because the tube can be replaced for $100 if ever needed and it puts out at least legal limit easily with full exciter drive. It seems that I ran across someone on one of the amateur gear classifieds some time back who had a blower for sale that had a much higher cfm rating and was made to be a “drop in” replacement for the al-1500. That being said, does anyone happen to know what this blower is, who makes it, or one that will do the job? Does anyone know who actually manufactures the factory blower for these amps?