ACOM still the best choice after all?
What a sh*tty construction!
Vy 73, de Kees - PA7TWO - M5TWO
DX IS and CW RULES!
Twitter: @PA7TWO
> From: k4vud@hotmail.com
> To: amps@contesting.com; lrrbst@yahoo.com; msole@loxinfo.co.th
> Date: Tue, 18 Feb 2014 00:32:33 +0000
> Subject: [Amps] Alpha 9500 quirks
>
> Please pass this info to Alpha 9500 owners.........
>
> 1. Mine may be unique, but the foam piece between the mount for the blower
> and the bottom chassis may be deformed or become deformed which will throw
> the axis of the squirrel cage and reduce air flow. Really deformed foam will
> allow the axel to go so far off alignment that the cage will strike the
> housing and make a noise. The foam is deformed by the shipping hold-down
> screw--the one to remove during first installation--and in my case, the foam
> did not expand upon release of the screw. After a few hours of usage, the
> cage began to hit the housing, requiring replacement.
>
> 2. The Alpha 9500 advertising description led me to believe that the amp had
> over-drive automatic shut down protection. That is, if it is driven with
> more than about 100 watts, the amp will protect itself automatically. Yes,
> it does that, but the way it functions is to cause a one watt resistor to
> blow that is mounted on the rear circuit board. That resistor is a tiny SMD
> which will be beyond most old hands to repair. Thus, the "protection"
> against accidental over drive is a resistor working as a fuse located in a
> very difficult place to replace. The caution to owners of this amp is NEVER
> to overdrive it, accident or otherwise, because the repair is not easy nor
> quick; the resistor is not a fuse that one can just pop in. I was fooled by
> the advertising description and was not super careful.
>
> 3. There is a small light on that board that blinks red. It is supposed to
> do that.
>
> I now fear what other unknown tricks and flaws await me using this very
> expensive amp. 73,
>
> Charles Harpole
> k4vud@hotmail.com
>
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