tag:blogger.com,1999:blog-5481402030233340127.post563036054978252750..comments2024-03-28T17:24:07.520-04:00Comments on Perf and PCB Effects Layouts: Univox SquareWavedtgehringhttp://www.blogger.com/profile/09555201436004501222noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-5481402030233340127.post-56829434228991924532020-11-14T19:56:50.006-05:002020-11-14T19:56:50.006-05:00The top left 100k resistor should connect to the b...The top left 100k resistor should connect to the bottom of the 100nF capacitor (Row B, column B to row E, column F). With that change, the board works.<br /><br />I tried both versions on breadboard first. The original resistors and the 2N5458 make a very gated fuzz that won't quite reach unity volume, though it does sound good. LT's version solves the volume and gating issues as advertised. A 1.8K resistor off the Q1 emitter and a 2.7k resistor off the Q2 source got me pretty close to the voltages on the modded schematic. <br /><br />LT also came up with a second version that took out one of the diodes. In his words: "Well, there's no cheaper way to increase the volume than remove the diodes...and in this circuit, the diodes don't do nearly as much as others...just a bit more fizz."<br /><br />I made my perf version with LT's resistor values and a 2N5458, since they are still easily available in through-hole versions. I put a socket in for the diodes, but I think I'll leave them out. I also left a gap in the ground rail on the left side of the board so that I could put a pot in series with the 33uF cap as a gain control. The circuit doesn't have the typical Fuzz Face guitar volume clean-up, so the gain pot can tame the fuzz a bit. JDThttps://www.blogger.com/profile/04252685794749449237noreply@blogger.comtag:blogger.com,1999:blog-5481402030233340127.post-14665444477515258612020-06-26T20:29:21.607-04:002020-06-26T20:29:21.607-04:00Will try it tomorrow, wish me luck!Will try it tomorrow, wish me luck!Anonymoushttps://www.blogger.com/profile/14324245005540913193noreply@blogger.com