On Jan 31, 2:53*pm, Fred wrote:
"Phil Allison" wrote :







"bud--"

Surges damage cell phones? I would ignore anything this source says.

** Nor would I.

Just a few days ago I took the opportunity to break open a Nokia cell
phone charger - the only thing that MIGHT be damaged by voltage spikes
on the AC supply.

The incoming AC connects first to a 10 ohm fusible resistor, then a 4
x 1N4007 diode bridge then a 4.7uf 400V filter electro. Very simple
and very robust.

Any surge on the AC that killed the Nokia would take out all the CFLs
and many other things too.

.... *Phil

Yep, that supply will eat any surges caused by loose line connections,
switching motors on and off, etc......for lunch, convert it to a
regulated DC output and feed it to the phone as if nothing happened.

I don't buy any wall warts that aren't switchers any more.....even to
charge the wine cork puller.- Hide quoted text -

- Show quoted text -



Switching wall warts are notorius for extremely high RFI.

You can use them as long as you never want to use an AM radio at the
same time.

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