[Amps] DEAD Alpha 91B

Jim Brown jim at audiosystemsgroup.com
Mon May 18 09:03:33 PDT 2009


On Mon, 18 May 2009 12:33:19 -0300, Thomas Carlsson wrote:

>The Alpha 91b is a great amplifier

Mike,

While you're in there, you might want to check to see if this model 
is running a 120V fan between one side of 240V and ground. As you 
know, that's a no-no, and generates problems with magnetic fields. 
Alpha does that with some of their older amps. Ten Tec solved that 
design problem correctly by running their 120V fan off of half of 
the primary of the power transformer. 

73,

Jim K9YC




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