I think it's a worthwhile exercise to at least work through the math. Then,
overrate components as needed or desired.
Many builders select overrated components as an easy alternative to the
computations. OTOH, we can cut some slack to experienced builders who at one
time or another worked through the problem, then carry that knowledge over to a
current project.
Paul, W9AC
Sent from my iPhone5
> On Oct 11, 2014, at 2:07 PM, Bill Turner <dezrat@outlook.com> wrote:
>
> ------------ ORIGINAL MESSAGE ------------(may be snipped)
>
>> On Sat, 11 Oct 2014 16:35:39 +0000, Manfred wrote:
>>
>> Of course everyone is free to use 1N5408 or 6A10 diodes, at $0.278 and
>> $0.368
>> respectively at Digikey. And if somebody wants to use 10 in series in each
>> leg,
>> who am I to forbid that? But technically it's pointless.
>
> REPLY:
>
> Since the beginning of the semiconductor industry, diodes, and
> especially power diodes, have been a source of failure. Technically
> your arguments are correct but long experience has proven otherwise.
>
> And when over rated diodes are so cheap, why not use them?
>
> 73, Bill W6WRT
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