[EMAIL PROTECTED] (Tugrul Tanyol) wrote:
<snip>
Today we measured the output of my 220-110V convertor to see that it
supplies exactly 119V. I know that 110V US current does not harm the unit,
do you think 119V burnt that adapter?
<snip>
I needed 9V for a new effects pedal i bought, which came without an
adaptor.. i had an adaptor that you can select between 6v, 9v and 12v for..
but its about 10 years old, so i got out the ole' multimeter to test it..
"6v" put out 9v, "9v" put out 12v, and "12v" put out 15v.. so i went to the
local tandy and talked to the people there. Apparently, there's two types of
adaptors.. regulated and unregulated. An unregulated adaptor has voltage
settings, but the actual voltage output varies with the load on the adaptor
- whereas a regulated adaptor will provide its specified voltage regardless
of load conditions (within reason)
Anyway, the moral of the story is when i tested the old adaptor
(unregulated) with a multimeter, it wasnt under load - yet the people at
tandy assure me that, when under load, it will drop to -around- its
specified voltage.. which is probably what will happen to your adaptor.
However, for voltage sensitive devices - for example, a portable minidisc -
a voltage approximation may harm the unit, altho for charging batteries, i
would guess it'd be fine.. can anyone clarify?
on another note, unregulated adaptors introduce some noise into the circuit
for guitar pedals, and i'd assume it'd be the same for most audio things, so
if anyone's getting dodgy sound out of their portable when its running off
an adaptor, that might be the cause..
nick
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