Getting no signal from my 1590a cupcake. When I hook it up through my testing rig it's fine, so I think it has something to do with the jacks. These are the Neutrik jacks from Mouser that Brian recommended in the baby build guide.
(http://i1077.photobucket.com/albums/w466/pmurray47/IMG_2637_zps7c0e3254.jpg)
(http://i1077.photobucket.com/albums/w466/pmurray47/IMG_2636_zps15aad9fc.jpg)
(http://i1077.photobucket.com/albums/w466/pmurray47/IMG_2635_zps076b66e8.jpg)
(http://i1077.photobucket.com/albums/w466/pmurray47/IMG_2634_zps2433fa94.jpg)
(http://i1077.photobucket.com/albums/w466/pmurray47/IMG_2633_zpsbe4a6a59.jpg)
Looks like you have your input jack wired to the wrong row of lugs. One row is lifted when a plug is inserted and serve as dummy contacts (extra soldering pins). Insert a jack and audio probe the two rows of pins...one should have signal and one does not.
Right you are! Thanks! This is the first time using these jacks and I didn't know how they worked. I do now ;D