What DC adapter does this clock use?

 Someone was throwing away this HoMedics ss-5000 alarm clock, and I "rescued" it. The DC adapter wasn't with it, though, so I want to find a replacement for it. (Without the adapter, it won't give any features besides the time and temperature.) Might any of you possibly have this clock and/or know what specs its adapter has?
  Win Guy

P.S. I'm sorry that the photos are sideways, the camera I used auto-flips images that are taken at an angle, and that was the only way that I could take the pictures without the flash coming back and glaring in the lens.

 UPDATE! I found a really old variable voltage adapter, but it has a fixed amount of amperage: 300mA. In any case, today I'll open the clock and check the polarity. From there, it'll probably be smooth sailing. Thanks to everyone who responded to my post!

 But this question is still open to people who have this clock who can tell me exactly what the specs are.

Picture of What DC adapter does this clock use?
I found this:

I didn't notice any specs for the adapter in that document.  It just refers to it as "adapter", and has a little cartoon picture of it.

It has a battery backup, and I'm going to guess that the negative terminal of the battery backup and the negative terminal of the power jack are the same node.  You can use an ohmmeter to check and see if those are connected to each other.  Anyway if that guess were true it would tell you the polarity of the jack.

Actually there are other ways to figure that out.  I mean you just take it apart and look at which way the LEDs and the electrolytic capacitors are wired.

There might even be little printed markings on the board telling you what the voltage and polarity of the power is supposed to be, but you know that's a long shot.

Anyway, I'd sort of take it apart a little bit, enough to get a good guess for the polarity.  Then do what Iceng suggests, start with around 5 volts, then try higher voltages, 6, 7,8,9, etc, until everything works. 

If you go too high, or wrong polarity, with the supply voltage, there is danger of letting the magic smoke out.

As another tack:  While searching, I found references to this thing being sold at Target(r) and Walmart(r).  If you have one of those stores near where you live, then you might have an opportunity to find one of these things on the shelf, and sort of take a look inside the box.  I'm not suggesting you steal the parts missing from yours, but there might be some clues on the adapter itself. You know words and symbols, indicating its output voltage and polarity. 

iceng6 years ago
So, I see coaxial power receptacle on the back by the antenna wire.

Radio Shack or eBay sell wall warts that allow different connectors and a voltage selector for DC output. I'm thinking 12VDV the center pin positive.

To be safe start at 6V and test the radio, then 8, 10, 12, 15, 17.
Stop when and where it works.

Hope this helps,