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I purchased this as a backup to the batteries because I was using it for interviewing. If the battery is drained the quality of the recording is affected. So you may be better off using the adaptor to play it safe.
The Amazon product description for this device did NOT indicate (as literature with the product did) (1) the polarity of the output plug -- it was wrong for my application, and (2) that this device should not be used with a radio -- it was wrong for my application. If I had found the package on display in a store I would have known this immediately, and have passed it up. The supplier sent me a note saying that the deficient product description they published was supplied by the manufacturer, so it wasn't their fault and have not offered to take back the merchandise and issue a refund (it's still sealed in its original package). Not much money, but it's the principle.
I use a digital recorder daily, with raising cost of everything, this product is an excellent money saver. It has a already paid for itself in the cost of batters, recordings esp at HQ drains batteries and dictation also drains even more.Save money if you use a Sony Digital Recorder, get this product.
This switching supply generates radiated and conducted interference. I can't recommend it for powering a radio, or operating it in the vacinity of a radio. When current draw is very low, it produces 120 Hz noise also. A better design one would expect from Sony.
Just the product I wanted. I spent a lot of money on batteries for my everyday recording. Everything is good about this product and it works as explained.
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