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RE: Modified amplifier FROM MARANTZ PARTS

Posted by Bold Eagle (A) on July 10, 2012 at 10:21:05

In Reply to: Modified amplifier FROM MARANTZ PARTS posted by orly40@ymail.com on July 4, 2012 at 22:59:19:

If that is just two output transistors per channel, it's probably based on a Marantz 140, or maybe parts from a 2270 or similar receiver.

I don't know how hard it would be to change; but it will cool better if the fins ran vertically on the heat sink as you'd then get some convective airflow. Also, the fan doesn't doo much with the upper and lower fins. Two smaller fans placed one above the other would be quieter and more effective with the horizontal fins. You really want the airflow down between the fins. With the single center mounted fan, only the center row of fins gets the benefit of the fan.

Jerry

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