Here’s a picture of a properly adjusted unit:
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I would send my 2-port 5200 to atari-dna, he fixed and readjusted mine, back when I gave up on using an a/v/power-modded 5200 only due to a lack of compatibility with my VCS adapter (I still own both that a/v/power-modded 5200 and my deadstock non-modded 2600 Jr short rainbow just in case I need them), he also made sure I could use my VCS adapter and also tested it before sending it back to me, and although I'm not too much into the traditional RF buzzing of our non-modded (channel 2/3/4) vintage systems I enjoy the fact that I only need ONE system to do the job of both (and using only two wall plugs, one for the 5200 and one for my Insignia 39" TV), and yes, I DO have ROMs of the 2-port-hacks of Pitfall!, Mountain King and K-Razy Shoot-Out so I can play those too using my Atarimax Ultimate SD multicart and I also own an AtariAge Harmony Encore 2600 SD multicart as well as tons of games on both!!!
The only thing I wish for is that someone would make a 5200 clone that would work like a 2-port unit so I can also use my VCS adapter with it, as much as I like Big Sexy (and I have ever since getting my first 5200, a US-made 4-port, Serial No. 141101, back for my 17th birthday on May 19th, 1983), we can do without the excess bulk nowadays thanks
BTW, I also own two AtariAge/Pixels past Redemption 5200 interfaces (2 each) for 2600 controllers and also 7800 controllers, whenever I need that second fire button for games like Defender (for the smart bombs), and also some Wico Command Control 2600 ball sticks and 5200 joysticks and also the touch-tone-quality keypads too.
Just a few things left to get and that's it, all I need now are some Best Electronics gold CX24 joysticks, another gold CX52 stick to go with the one I own, and also to get my 2 CX53 Trak-Ball controllers fixed and/or recalibrated, as the bubble fire buttons do not work and the circuits on the keypads don't seem to work too well.
Also on my dream list are some 5200 paddle controllers which utilize the CX52 chassis with either a paddle or driving controller put in place of the joystick (for Kaboom!, Super Breakout, Tempest, etc.) and with the Best gold flex circuits already installed in them too (I have plenty of cores for the CX52 and CX24 sticks I want, and I just need price quotes to get two 5200 paddle controllers, like this one: