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Posted by Logan Shaw on November 11, 2005, 9:46 pm
Please log in for more thread options Tinman wrote:
> doar_zevel_x@yahoo.com wrote:
>>can I use a branch connection (tee) for allowing 2 people to hear
>>music from my Palm Tungsten T?
>>Or can this damage the jack or even the maonboard of the Tungsten?
>>Is it possible to use a branch connection for more than 2 people?
> A Y-adapter will work, albeit splitting the output power in half (to
> each headset).
Hmm, seems like if you plug two sets of headphones in in parallel,
that would cut the impedence in half, which would cause the total
power output to actually increase. Whether it doubles or increases
less is a function of the particular type of circuit, I guess.
So the power that each set of headphones receives will probably be
less than they'd get if there were just one set of headphones, but
the total power output from the Tungsten should be higher. Whether
this will damage the Tungsten is another story entirely. Hopefully
they've designed the circuit to be able to handle that, and I would
be surprised if such a low-power circuit could overheat very easily.
It is possible to have problems with big power amps overheating if
you put too low impedence a load on them, but we're talking about
hundreds of watts whereas the Tungsten is going to be more like a
fraction of a watt.
I guess if you really want to be safe, you could check if the Tungsten
specifies the minimum impedence for headphones and use Ohm's Law to
determine if the combined impedence of all the headphones you plug in
is high enough to be safe. For example, if (and this is just
hypothetical) the Tungsten T can handle a 32 ohm load, and if you have
two sets of headphones which are 64 ohms, then you should be safe if
you plug them in, because 1/(1/64 + 1/64) = 32. By the way, the
reason I picked 32 ohms as a guess for the Tungsten T's minimum
impedance is store.palm.com sells some phones with a 32 ohm impedence
that they say are compatible with the Tungsten T.
- Logan
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