rayrayrayraydog Posted August 18, 2022 Share Posted August 18, 2022 (edited) I bought a composite modded 7800 on eBay years and years before I ever touched a soldering iron. I went back to install the UAV kit from brewingacademy.com on it yesterday, following the PDF and the YouTube video in the guide. I deviated a bit from the video as my 7800 already had some destructive changes made when the eBay seller modified it -- they removed the RF port by breaking it off the RF modulator (but left it in for some reason, I completely removed it), and removed R3, R5, and C10. The console before I installed UAV could play sound from Pokey (original Ballblazer cart). Now after installing UAV I'm not getting this sound. I did not have the exact 6.8k resistor to replace R5, but combined two that add up to 6.9k (tested w/ meter) and soldered them to the bottom hole of R5, then lifted R6 and connected them to the positive side of a 10uF capacitor as was done in the YouTube video and PDF guides (see attached image, sorry it's a little blurry). Any idea where I messed up -- do I need to replace R3 and/or C10? Edit to add: Everything else works with the mod. Composite and Svideo, and sound from non-Pokey games. Edited August 18, 2022 by rayrayrayraydog Quote Link to comment Share on other sites More sharing options...
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