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From: Jon Kirwan on 2 Mar 2010 16:44
On Tue, 02 Mar 2010 13:10:19 -0800, I wrote:

>I've converted it to a single, 16-page PDF file. If you
>want, I can post it up on the web and make it available at my
>site.

Here are the two, slightly more permanently posted up:

http://www.infinitefactors.org/docs/RCA%20AN-6688,%20Power%20Transistors.pdf
http://www.infinitefactors.org/docs/Hitachi%20mosfet%20appnote.pdf

Jon
From: David Eather on 2 Mar 2010 18:02
On 3/03/2010 7:44 AM, Jon Kirwan wrote:
> On Tue, 02 Mar 2010 13:10:19 -0800, I wrote:
>
>> I've converted it to a single, 16-page PDF file. If you
>> want, I can post it up on the web and make it available at my
>> site.
>
> Here are the two, slightly more permanently posted up:
>
> http://www.infinitefactors.org/docs/RCA%20AN-6688,%20Power%20Transistors.pdf
> http://www.infinitefactors.org/docs/Hitachi%20mosfet%20appnote.pdf
>
> Jon
Thanks.
From: David Eather on 2 Mar 2010 19:44
On 3/03/2010 7:44 AM, Jon Kirwan wrote:
> On Tue, 02 Mar 2010 13:10:19 -0800, I wrote:
>
>> I've converted it to a single, 16-page PDF file. If you
>> want, I can post it up on the web and make it available at my
>> site.
>
> Here are the two, slightly more permanently posted up:
>
> http://www.infinitefactors.org/docs/RCA%20AN-6688,%20Power%20Transistors.pdf
> http://www.infinitefactors.org/docs/Hitachi%20mosfet%20appnote.pdf
>
> Jon

Some "IMO" on the RCA app note.
For small audio amps, I think you do yourself a favour when you do all
your SOA calculations using the DC specification of the transistors. It
is less effort, less stress, the tiniest bit safer and in reality (for
most cases) results in exactly the same result or a minuscule increase
in costs (eg A TIP41 rather than TIP31 or some such).

For pretty much the same reasons as above, I think it is better to do
output calculations based on a 90 degree phase shift by the speaker load.

All above applies less and less as you talk about amps for tweeters,
very serious power outputs (KW and above) or thousands of units.

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