i have one, and there is no reset button, but the radio can be 
returned to factory defaults by removing the batteries.  Remember to 
remove all batteries, including the AA batteries.

Andy
At 05:31 PM 8/27/2009, you wrote:
>Hi Lou, the Sangean equivalent radio is the ats803, and or the 803A, and or
>803B./I've heard of all three.
>In terms of a memory battery,  Since the memories are volatile/will
>disappear when power is removed, or AA cells are removed, there's likely not
>any other battery supply for the radio's memories and clock, other than the
>AA cells.  Meanwhile, in terms of a reset button, I'm not sure, although I
>never remember seeing/feeling one, and I've experienced several of the
>units.
>Have you checked icanworkthisthing.com for a manual?   that should answer
>the reset button question---in fact you might find a manual at
>radioshack.com or 1800theshack, although considering the age of the unit
>that's a longshot.  *ANother longshot, Universal Radio may have some info,
>as they do sell those units used, quite often.  Those old radios do sound
>great, and usually work very well. Have you tried to bring the unit up
>strictly with batteries?
>HTH, Danny.
>
>
>----- Original Message -----
>From: "Lou Kolb" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Thursday, August 27, 2009 7:44 PM
>Subject: dx440 question
>
>
> >I have an old Radio Shack dx-440 am/fm/sw receiver.  Apparently, it's made
> > by Sangean and they have their own model number for the same radio.
> > Anyway,
> > after nearly 20 years of faithful service as my bedside radio, it has
> > stopped working.  Actually, that's not quite accurate.  It comes on when
> > plugged in but none of the controls work.  Anyone know if there is a reset
> > button on the thing.  Or maybe, if there is a lithium battery for the
> > memory
> > it has finally given out.  Guess I can't complain after nearly 20 years
> > but
> > I'm not willing to say goodbye to the thing just yet.  Thanks.  lou