Earth Orbiter-Grond Control to Major Tom

[Ishmael]

Good Morning, this is a first post. Recently I came across a Sony “Earth Orbiter” CRF-5100 10 band radio. It really brought back memories, and it was so cool looking that for $6.00 I went ahead and made a purchase, as even if it didn’t work just looking at it made me happy. Imagine my surprise when I got it home and found it worked and could pull in an AM signal, no FM, through a scratchy volume control. The lights worked, and it has the original AC power cord. Another cool moment was finding that the signal strength LED on the dial pointer lit up (you can see it in the picture below) and changed brightness as the signal strength increased or decreased (it also has a signal strength meter/but the light may be out on it, if it has a light?).

Other than our Sansui TU-717 I am a complete novice regarding the various bands on this radio, so here are my questions, and my thanks for any help you can provide:
1. Is there a good reference book, e.g. easy for a novice to read and understand, that explains what the various bands on this radio are for? For example there are 5 short wave bands with names like “SW5-International BC/Amateur”, “SW3-International BC”, “SW2-Domestic BC/Amateur” and “SW1-Marine/Tropical”.
2. In a similar vein, is there a good reference book, post, Youtube that explains the operation of the “Squelch”, “BFO” and “RF Gain” controls that are on this radio?
3. While I have found a CD service manual for this radio on Ebay I have not found an owner’s manual, are there any other suggested sites where I might find an owner’s manual for this radio?
4. This radio can accept external antennas, one for “SW” and “MW/LW” and the other for “FM,AIR,PSB” are there better/worse antennas you would recommend for these different bands?
5. Finally, I live in the Pacific Northwest and am a novice as it pertains to electronics. Given the nice condition this radio is in, and that it works, I would really like to take it to someone who could do a good job of cleaning, calibrating and servicing this radio. While I want to enjoy it in the years to come I plan on gifting it to a grandchild in a couple years so that they can discover the wonders of the real world. Any thoughts, suggestion on who I could take this radio to?

My thanks in advance for any help you can provide, I hope you enjoy the pictures attached. Looking at the back it appears it was only used on AC cord as the battery bay is pristine, except for dust.
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