I recently experienced some issues with the tube blower fan in my Alpha 9500. After running the amplifier for a while, the amplifier would begin to make a clickity-clack sound. This sound would come and go and would be annoying to say the least. After removing the top of the amplifier and viewing the fan in operation, it was clear the source of the problem was the tube blower fan.
The fan in the Alpha 9500 is internally mounted next to the tube and is of an open frame squirrel cage design. While in operation, the spindle of the defective fan motor would oscillate front to back on its axis while spinning, which created the noise. I contacted Alpha who indicated that they are experincing delays in supplying replacement fans, due to difficulty obtaining the metal work for the fan. After speaking with Brad, he agreed that if I sent in my old fan assembly, they could rebuild it and send it right back.
True to his word, I mailed off the fan to Alpha on a Thursday and had the rebuilt fan back at my location within one week. Alpha was nice enough to pay for return overnight shipping. The new fan motor has almost no fore and aft play in the spindle, and initial use has proven that the rebuilt fan is much quieter. Kudos again to Alpha Radio Products for outstanding customer service.
When plugging the amplifier back into the mains, the Amplifer entered into some type of display test mode...unpluging it and plugging it back in seemed to restore it back into ready mode...but what a light show...