tag:blogger.com,1999:blog-6847048658257278783.post8843981463677636819..comments2024-03-27T15:26:01.893+00:00Comments on Guitar FX Layouts: Walco Fuzz Tone GeneratorIvIarkhttp://www.blogger.com/profile/08416945174853142251noreply@blogger.comBlogger17125tag:blogger.com,1999:blog-6847048658257278783.post-70339362353946335132014-04-06T19:02:12.482+01:002014-04-06T19:02:12.482+01:00Yes. The upper one. You could also try lower value...Yes. The upper one. You could also try lower values for the 820K. That value seems pretty odd to me in that position.<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-61193677158480776472014-04-06T10:55:45.617+01:002014-04-06T10:55:45.617+01:00Hm... Q2 is the upper one, right? I'll give th...Hm... Q2 is the upper one, right? I'll give that a try sometime... It would be nice to have a small 1590A capable fuzz to make my board a bit smaller.drdFXhttps://www.blogger.com/profile/05100895565160403133noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-36885764368202080382014-04-06T07:23:04.838+01:002014-04-06T07:23:04.838+01:00I'll swap the wire labells once i get back hom...I'll swap the wire labells once i get back home.<br /><br />The layout doesn't stretch to it, but adding 220R resistor and 22ยต (or even higher) cap parallel from Q2 emitter to ground instead of putting it straight to ground - that should give a whole lot more gain out of the "fuzz" transistor. Just a thought...<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-29097013052720875622014-04-06T06:13:03.481+01:002014-04-06T06:13:03.481+01:00Don't get me wrong, it's always fun to bui...Don't get me wrong, it's always fun to build these things whatever the result is ;) With telling how it sounds I just wanted to reflect to the part in the description that there is no info available about its sound. I'd love to make a demo video but I don't have the gear for that. And maybe somebody will build this and find that he needed this sound. But it did not convince me... And of course thanks to miro for the layout, I love these compact quickies :)drdFXhttps://www.blogger.com/profile/05100895565160403133noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-85244437718319669892014-04-05T20:47:31.590+01:002014-04-05T20:47:31.590+01:00Well you can't win them all I suppose :o), but...Well you can't win them all I suppose :o), but thanks for verifying buddy!IvIarkhttps://www.blogger.com/profile/08416945174853142251noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-64454419083139951592014-04-05T19:51:53.727+01:002014-04-05T19:51:53.727+01:00Verified. A one trick pony, but the trick it knows...Verified. A one trick pony, but the trick it knows is not a good one. The Wooly Mammoth has much more sounds and can deliver the sound this one is capable of. The Increase Fuzz pot is a blend between clean and fuzz, but the fuzz sound has a lower volume, so the mix doesn't work too well. Tried 47p, 470p, 1n, 2.2n, 10n. The higher you go, the more is the fuzz and the high content. Yes, the high content. Also tried several transistors (2n5089, 2n5088, 2n3904, BC550, BC549 and 2n2222) they are more or less the same. Oh yes, if you want the conventional direction of how the fuzz is added (clockwise -> more fuzz), then the pot lugs need to be swapped.drdFXhttps://www.blogger.com/profile/05100895565160403133noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-64257627257366522982014-03-31T12:57:48.795+01:002014-03-31T12:57:48.795+01:00Either way. 470p should be thin sounding enough.
+...Either way. 470p should be thin sounding enough.<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-33291937687360384542014-03-31T12:57:24.411+01:002014-03-31T12:57:24.411+01:00There are some ceramic caps that do not use the co...There are some ceramic caps that do not use the conventional markings. Without measuring i can't be sure. I do know that there are some cheap ceramic caps that are 470p with marking "470".<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-23395043709263927082014-03-31T12:50:39.830+01:002014-03-31T12:50:39.830+01:00Checked the FSB thread. Actually the picture there...Checked the FSB thread. Actually the picture there shows a 47p cap. Indeed 470 is written on it, but according to the naming convention I know it means 47 x 10^0 pF, which is 47pF. Anyway once I find the time I'll build this to see how it works and then I'll definitely play with this cap ;)drdFXhttps://www.blogger.com/profile/05100895565160403133noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-40303203668949502652014-03-31T10:29:45.730+01:002014-03-31T10:29:45.730+01:00Thx, Miro... Should learn to use the search functi...Thx, Miro... Should learn to use the search function at FSB...drdFXhttps://www.blogger.com/profile/05100895565160403133noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-58438624509586494172014-03-30T23:43:13.765+01:002014-03-30T23:43:13.765+01:00Many thanks Csaba Dudas, that's very clear for...Many thanks Csaba Dudas, that's very clear for me now !Anonymoushttps://www.blogger.com/profile/15637262743950601785noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-88286358475147872792014-03-30T21:20:51.712+01:002014-03-30T21:20:51.712+01:0047p cap should probably be 470p, but the unverifie...47p cap should probably be 470p, but the unverified Walco schematic has it at 47p, so let's see what happens when someone builds it.<br /><br />This means that the Walco Fuzz Tone Generator is 1:1 with Kent EA-3 Fuzz Tone Bender.<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-49473815163766485792014-03-30T21:17:41.754+01:002014-03-30T21:17:41.754+01:00http://freestompboxes.org/viewtopic.php?f=19&t...http://freestompboxes.org/viewtopic.php?f=19&t=24219&p=236663#p236663<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-12122908989040309512014-03-30T20:50:43.394+01:002014-03-30T20:50:43.394+01:00Miro, do you happen to have the schematic for this...Miro, do you happen to have the schematic for this? Couldn't find it with google, and I tried to trace back from the layout, but what I got is something I can't really understand (which probably only shows my lack of knowledge...)drdFXhttps://www.blogger.com/profile/05100895565160403133noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-39747871091890180072014-03-30T20:20:23.969+01:002014-03-30T20:20:23.969+01:00That's the D1 Schottky diode in series with th...That's the D1 Schottky diode in series with the +9V. It saves the circuit if you connect power the wrong way (swap ground with hot wire). The price is that you lose some voltage on the diode opening voltage - about 0.2V in case of the 1N5817 in the layout. You can omit it and either just put a jumper where the diode is or connect the +9V to the third row below where it is now.drdFXhttps://www.blogger.com/profile/05100895565160403133noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-40388342814858870282014-03-30T19:13:14.854+01:002014-03-30T19:13:14.854+01:00Hi there,
It must be a stupid question, but what d...Hi there,<br />It must be a stupid question, but what do you mean when you say "added polarity protection" ?<br />Many thanks and congrats for this amazing site.<br />GregAnonymoushttps://www.blogger.com/profile/15637262743950601785noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-7075190708287153252014-03-30T18:23:19.865+01:002014-03-30T18:23:19.865+01:00Hmmmm. Interesting.Hmmmm. Interesting.Doron Barnesshttps://www.blogger.com/profile/11002512823760367163noreply@blogger.com