[ARC5] Considering GO-9 Transmitter Power Options.

[Dennis Monticelli]

A higher peak-to-average current waveform increases the heating of
transformers (winding resistance), rectifiers (ON resistance) and
capacitors (ESR).  So it is a good idea not to overdo it with filter
capacitance.  It's not just the turn on surge potentially damaging
components, it's the repetitive recharging of the cap on each peak of the
line that heats things up unnecessarily.

Dennis AE6C

On Wed, Sep 4, 2019 at 3:57 AM David Stinson <arc5 at ix.netcom.com> wrote:

> The MOSFETs are speced for many amps.  Our B+ supplies can't source
> enough current to blow them that way.  But it's a good point.  Once the
> MOSFET is turned on, the concern is whether the B+ transformer and
> rectifier are good with 50 mFd.  If they're designed for, say, 8 mFd cap
> input with choke and 8 mFd out, nailing 50 mFd across the buss is
> probably not a good idea.  A much lower value will likely work fine.
> Good catch.
>
> 73 DE Dave AB5S.
>
> On 9/3/2019 9:35 PM, AKLDGUY . wrote:
> > I notice a 50uF capacitor on the output of the Mosfet. Are there any
> > concerns over inrush current destroying the device?
> >
>
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