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Vivek 17th July 2003 09:13 AM

Need 2 watts
Hi all,
I have built a new discrete power amp. I just set the bias current as recommended in the article.
The article says ``adjust the output of the source so as to deliver 2 watt and let the amp be on for six hours with a dummy load.'' Here is my problem: How do I get an output of 2 watt? Do I just use my cd player and adjust it to the necessary voltage and current? Or what else can I do?
Thanks for any help.

fdegrove 17th July 2003 09:21 AM


I think they mean 2V RMS not 2W.
So just hook up your CDP to the amp and have a CD play in a loop during the bread-in period.


Vivek 17th July 2003 09:23 AM

You are probably right. But I think the whole idea is to check whether the transistors are stable and do not overheat, right?


fdegrove 17th July 2003 09:27 AM


Amongst other things, yes. But I fail to see why that would need six hours to find out.

In any case monitor your circuit for a while to see if all behaves as expected.


Vivek 17th July 2003 09:29 AM

I shall. Thanks, Frank.
I hope to post pics as soon as it is done.


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