Hi new guy here with a Zenith Automatic Frequency Control radio

[chasaboo]

Well I'm testing old radio waters and I bought a Zenith Automatic Frequency Control radio. I've been on this website for years and had no idea there was a forum devoted to antique radios, great stuff.

It's funny but when I took the plunge and bought this radio I thought it would probably be a transistor radio but it takes about 20 seconds or so for the radio to warm up so I'm guessing it's actually tubes.

The funny thing is I haven't opened it up yet to see what's inside. I'm a little stymied by its construction. It's a bit like a green plastic bucket that sits on its side. The face plate actually covers what would be the top of the bucket. I see two screws on the bottom and two screws in the back but I haven't figured out what these screws do or how to get inside.

I'm a little afraid to try and open it for fear of breaking or killing the thing. It plays reasonably well and tunes in my favorite classical music station quite nicely.

Can a radio such as this have a big improvement in sound by replacing tubes and capacitors or would I have to go so far as replacing the speaker? I realize it's not an audiophile piece of equipment but I like the old girl and was wondering if the sound could be tightened up a little. Below is a picture of this model of radio I have but it's not the exact one I have as my camera is traveling somewhere in Asia right now.

Thanks for any thoughts and advice you might have.