[Amps] Transformer spec's for linear amplifier - added

[R@contesting.com]

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