bjammerz Posted February 4, 2016 Share Posted February 4, 2016 (edited) Brought out my original 6-switch light Atari 2600 from the closet... original owner, the unit is in very nice shape. To hook it up to a modern TV, I just went through the composite video modification process from retrofixes. My TV wouldn't recognize the signal at all out of the RCA to coaxial adapter, so it was a must. http://www.coolretroprojects.com/Atari_2600_AV_Mod_Installation_Guide.pdf After completing the modification, the audio has some sort of strange feedback problem (or it may have been there all along, I wasn't able to test before mod). The last sound effect that's generated, grows in sound until it just blasts loudly. I've removed the Q202 transistor and R213 as mentioned in the instructions, but not sure what could be causing this problem? It also seems like some sound effects are much quieter than others, as in the second video with Joust. Here's a few videos to demonstrate, and thanks for any help: https://youtu.be/eSXZDIA975Y https://youtu.be/1_VqaD8rmf0 Edited February 4, 2016 by bjammerz Quote Link to comment Share on other sites More sharing options...
Keatah Posted February 4, 2016 Share Posted February 4, 2016 Video is private. Quote Link to comment Share on other sites More sharing options...
bjammerz Posted February 4, 2016 Author Share Posted February 4, 2016 D'OH!!! lol. Ok i've published the videos, much appreciated again. Quote Link to comment Share on other sites More sharing options...
Master Phruby Posted February 4, 2016 Share Posted February 4, 2016 Demon possession? Quote Link to comment Share on other sites More sharing options...
bjammerz Posted February 11, 2016 Author Share Posted February 11, 2016 Just bumping if anyone had some insight to the videos, thanks Quote Link to comment Share on other sites More sharing options...
zylon Posted February 13, 2016 Share Posted February 13, 2016 I would check the poly caps for the sound output. Press on them with your finger tightly while system is running to see if the sound changes. Quote Link to comment Share on other sites More sharing options...
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