madbeanpedals::forum

Projects => Tech Help - Etcher's Paradise => Topic started by: Obie bong kanobie on December 29, 2016, 07:35:24 PM

Title: turnabout pin 1/2 voltages are off
Post by: Obie bong kanobie on December 29, 2016, 07:35:24 PM
ok so my voltages are normal on all the other pins except pin 1 which is 1.4v and pin 2 starts at 3.6v and drops down to 2.6 as I hold my probe to it (7.9v battery supply)

ill post some pictures asap, I've reflowed the solder and checked for any bridges as well as swapping out opamps
Title: Re: turnabout pin 1/2 voltages are off
Post by: Obie bong kanobie on December 29, 2016, 07:51:29 PM
(http://i1305.photobucket.com/albums/s548/jessebelanger1988/IMG_0863_zpsd9t4sqnx.jpg)

(http://i1305.photobucket.com/albums/s548/jessebelanger1988/IMG_0864_zpsins1gd4n.jpg)
Title: Re: turnabout pin 1/2 voltages are off
Post by: Obie bong kanobie on December 29, 2016, 07:58:28 PM
substitution's 470-ohm resistor on a switch with a 1k as the second option. it may not work but I figured I'd try what the ocd does for the hp/lp ish seeing as how the AT is a cross of a blues breaker and an ocd with some added goodies

220nf cap on a switch with a 100nf so I can reduce some bass if needed, again I may have selected a bad place to accomplish reduced bass

120k/27k in parallel for the 22k resistors because I don't have any in stock currently

and finally the second 100pf cap in the schematic has been changed to a 67.3pf cap for a little-added brightness

excuse any ignorance on my behalf lol
Title: Re: turnabout pin 1/2 voltages are off
Post by: Obie bong kanobie on January 01, 2017, 06:51:37 PM
lol I figured out what it was, I hadn't soldered the pots onto the board yet   the second I did all my voltages became normal  ;D