|商品尺寸||15.24 x 5.08 x 8.89 cm; 249.48 克|
Sangean mmr-77 Emergency AM / FM 便携式收音机
AM/FM Portable Emergency Radio with 1 minute wind for 30 minute play time, can be powered by standard AA Batteries (batteries not supplied) and can also be powered by AC Adapter (not supplied).
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I bought this for camping, and porch sitting type of duty. All I wanted was something small, with good reception, and not a hassle to operate in the dark.
There are three options for power: two AA batteries, or the internal battery pack charged by the dynamo crank, or you can invest in an ac 5 volt adaptor. It seems like you get a lot of hours out of the AAs, so that's probably all I will use, except in emergencies. Nice to know you aren't screwed if you forgot to bring along extra batteries, though. Just have to remember to cycle it and use the battery pack now and again, to keep it viable.
Yeah, it doesn't come with the AC adaptor. Kind of chincy..but look at the price.
The AC cord does not charge the battery pack. Only cranking does that.
Two ports: the AC, and one for earphones. That's it. No USB or anything like that. Which is fine by me.
The dial is illuminated, but you have to activate the flashlight to enable it..which seems kind of wasteful on battery life, but it's a minor gripe.
The flashlight is not much to write home about, but I guess it's enough to find stuff on the tent floor.
I have other flashlights. Don't really require my radio to have one.
Reception is great on both bands, sound is nice, for as small as it is.
Tuning is smooth and predictable. This is just a generally well engineered little radio.
For the price, it's an excellent choice.
I think this is true of rechargeable batteries in general - if you let them discharge too much eventually they can't be recharged, so I suppose that's what’s happening here.
I suppose that means that you might be able to keep the built-in battery alive by cranking it every month or so. But if you forget, eventually the internal rechargeable battery will go completely dead. I bought one of these for my girlfriend, and hers has gone dead too, so that's how I know it's not just I have a defective radio - I believe they all will eventually do that.
Otherwise it’s a great radio, I’ve had it playing in my kitchen using an AC adapter for years.
BTW, I looked at some other dynamo radios, and this seems to be a frequent issue, so maybe it’s not just this radio, but all of them with built-in batteries that have this problem. Too bad, it’s really a great idea to have a crankable radio for emergencies, but if it’s not dependable…
Even in my concrete-walled residence, I'm amazed at the Sangean's crisp audio reception and dial precision. With other pocket or portable radios I have, at this price or under, clear reception has been poor to average to sketchy under the same conditions.
The Sangean is also a small marvel of smart design-engineering. Not only does every feature work well, but its parts are located where they should be. Efficient and effective. No waste. And the materials are solid, not cheap -- including the hand-crank, which I've found to hold a long charge.
Having spent weeks and weeks searching for a durable, reasonably priced emergency radio, what a find this one is. The Sangean is genuine quality, not over-priced junk. Reliability, not hype. Truly impressive in the emergency-radio market.
Because, in at least my experience, many fancy, more expensive emergency radios have amounted to empty promises, an emptier pocket, and were useless within six months of light use or after their warranties (if any) had expired. So, I'm not surprised that other people's reviews, about those kinds of radios, reflect widely similar dissatisfaction and disappointment. Not a cool thing when your and your loved one's lives and safety may depend on a reliable essential you've paid hard-earned money for.
So, the Sangean MMR-77 is a bona fide standout. And, for what I can attest to at this early stage, I heartily agree with all the positive reviews here. So much so that I'm confident that I'm likely to be thrilled with this unit for years to come. And, most importantly, that I'll be able to count on it, if and when an emergency strikes. On every count, this is a genuine bargain for the value. They simply don't make radios like this anymore. (By the way, this Sangean is built in Japan.)
AC Power Adapter Info:
As others have mentioned, this unit is not sold with an AC power adapter. So, for folks not literate with electronic components, but who wish to run this radio on AC power, the following two items can be purchased at your local electronics store:
1) An Adaptaplug - Size A (a 2.35mm O.D./outer-diameter, 0.7mm I.D./inner-diameter plug); and
2) A 3-watt AC-to-DC power adapter
AC/DC WARNING: The Sangean MMR-77 requires positive (not negative) tip polarity. The symbols on the rubber cover of the radio's DC input jack indicate this fact. This means that you must be sure to align the plus symbol (+) of the Adaptaplug, with the part of the AC cord that's marked with the word "TIP." Why is this important? Because incorrect polarity can damage the radio and/or the adapter.
I paid about $18 for these two extra items. It's an added cost I would've happily paid for the Sangean, had it been sold with an AC adapter. But we can presume that the adapter's exclusion keeps down the cost of the radio, which makes it affordable for more people who are okay to use it with battery and/or crank power only. The separate adapter purchase may be an inconvenience for some buyers, but for others on a more limited budget, that option seems a considerate one.
Bottom line: this radio rocks. Kudos to Sangean!