Yeah, like Paolo said, does it have the modulator plug on the back? It's an RCA type connector like on a 2600 jr or 7800.
Also on the top next to where it says 1040ST there should be a small F or FM.
I checked the system and it doesn't have the RF plug like the 2600. According to the auctions I found on EBay you don't need the built-in RF adapter to use the 1040st on the T.V. Someone created a cable that converts the ST's monitor signal into a composite signal. Here's a picture from the auction:
I was wondering if someone knew how to build these (i.e.who has a schematic they could share) so I could build one.(Added description from auction):
Brand NEW!!!! Plug N Play!
THE "ONLY" 6 ft Premiun (OXYGEN FREE COPPER/SHIELDED a/v cable) for Atari ST 520st, 140ST, St,STm,Stf
* For all ST, OR COMPATIBLE COMPUTERS WITH AN 13 PIN DIN MONITOR PLUG!
* Easy plug and play!!! Monitor out to TV or monitor (RCA plug)
* Brand NEW....Displays a Perfect Color Picture and sound on your TV!
6 FT cable!
tHE ONLY ST A/V CABLE!!!!! 24K GOLD PLATED TOO....
******1 year guarantee!!! no matter what happens to it!!!!*(who does that?)
****Check out my shipping!!! Look at other's....
(Picture is CLEAR!!! AND..IN FULL BEUATIFUL COLOR and Sound!!!!
***NO MONITOR NEEDED!!!!!! "UN-BELIEVABLE!!!!!"
Check out my other items!
Must be paid within 5 days. Unless worked out with me first. Internation must contact me before bidding for shipping rates unless calclutated already. NO RISK!!!! *1 year guaranty, just send it back for a NEW one, pay only S/H
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Edited by retrogeek, Fri Mar 28, 2008 7:43 PM.