Finally got a working Intelli(thanks masschamber!) and it's got a jittery picture on my Emerson 32" LCD. When I hooked it up directly to the RF on my Element 20" LCD, it's fine. So I eliminated the system as the culprit. Here's the rundown of the setup on the 32";
-Intelli/2600
-Gepco VHD2000m flexcore cable
-Archer 15-2100 amp'd selector
-RG6 coax
I even tried that little Radio Shack RF booster before and after the Archer with no luck. My 2600 does fine on the 32". Is it safe to say the Emerson's RF is lacking something and is there anything to improve the TV's RF?
Years ago I had one that was hardwired to the board. I just snapped off the connector and soldered. I have 4 DS3's(2 won't do a thing, even with a new battery.) and they use connectors.
Also, when you put the HU in, back it out so it just clears the power switch slider. Then for the port, you can put all 3 grounds in one pin, or separate pins.
The voltage needs to be 9w and at least 650MA-1000MA. Polarity is something you'll need to watch for on the label;
<->-•-<+>
Also, the universal AC adapters for NES/SNES/Genesis works too. That's what I used when I had my TG-16. Then I would clean the RF before testing it. An alternative is using the serial port on the back to get composite video.
One place that sells cap kits, if you want to give it a shot;
https://console5.com/store/nec-turboduo-cap-kit.html
Then if you'd rather have it done;
https://www.game-tech.us/mods/turbo-duo/
If you already have the N8, you'll want an adapter. If you plan to buy a cart, there's is the Famicom N8. I'm not sure if there's a lockout mod like you can do to the front loader NES that'll let you play imports on the Famicom.
Here's a great page for system/arcade card compatibility with the different NEC set ups.
http://pcenginefx.com/main/pcenginefx_com_-_nec_compatibi.html