I own that receiver for more than ten years.
I bought it for about my one monthly average page.
It has many extra functions like synchro detector,
narrow/wide AM filter and separate USB/ LSB+CW filter.
It is one of my best SW receivers.
But it is not situable for carrying around, because
there is a simple belt instead of a real handle.
Mostly of time I use DC 6V power supply, because
baterries goes down in a few hours.

Caribbean Listener wrote:

Finally getting the Sony SW-77 following a great deal at the Sony
Store here in San Juan Puerto Rico which had the unit for $300!!!! Put
two on lay away for Christmas. Although I have read the reveiws on RNW
and Dxing.com, I would like to know what users think. I have heard
it's a difficult machine but I have also heard that its sensativity is
excellent, which is important to me living here in a noisy island.
By the way, my Realistic DX440 has proved an invaluable Dx receiver
for me here. Someone asked if I wanted to part with it, I told that
person I couldn't for the time being.