AC Adapter for compact FM Transmitter

I have a compact FM transmitter that runs on three AA batteries. I'd
like to get an AC adapter for it but am not sure what specs are
necessary.

At first I was thinking that a 4.5 v AC adapter at around 300 mA,
similar to the one for my discman, would do, but I've noticed that my
small Belkin Tunecast II can takes a DC input of 12v at 200mA, which
makes me think that the AC adapter should also be rated at 12v.

I think the IC on this transmitter is the cheapest one available that
has PLL tuning (Rohm?). My limited understanding of the finer aspects
of electronics tells me that I must know the power requirements of the
transmitter's IC to determine AC adapter suitability. The only problem
here is that the manufacturer has sanded off the chip's identification
markings so as, I suppose, not to give away its trade secret.


Thanks for any help you can offer.

ES

.

Relevant Pages

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