On Jul 7, 2005, at 4:00 AM, GGLL wrote:
> Having the need of a 2500VDC @ 350 mA maximum current power supply,
> and
> planning to use a full wave voltage doubler, how can I establish the
> correct
> current rating for the transformer?.
A good clue is the R of the secondary winding. This is discussed on my
Web site. Another consideration is whether the current will be
continuous - as for FM broadcasting - or intermittent - as for
voice-SSB, where the average current is c. 30% of the maximum current.
> It should be nearly 930 VAC and exactly
> 700 mA of current, or can I reduce somewhat its current rating (taking
> in care
> amateur, CW/SSB use, also AM at reduced carrier) so as not to expend
> more $$
> than really needed?.
>
> My question is oriented to duty cycle, so , if possible and advisable,
> how can
> I lower current ratings to save costs. I've read in many articles (all
> for
> amateur use, with transformers already salvaged from TV sets, and so)
> where
> smaller current ratings where used instead of theoretical ones.
>
> Thanks in advance
>
> Best regards
> Guillermo - LU8EYW.
>
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>
>
Rich Measures, 805.386.3734, AG6K, www.somis.org
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