tag:blogger.com,1999:blog-6847048658257278783.post7600360244109126351..comments2024-03-29T01:36:12.851+00:00Comments on Guitar FX Layouts: Roger Mayer Axis FuzzIvIarkhttp://www.blogger.com/profile/08416945174853142251noreply@blogger.comBlogger42125tag:blogger.com,1999:blog-6847048658257278783.post-56346478865493546562021-03-27T10:18:33.671+00:002021-03-27T10:18:33.671+00:00Scroll up.. Its in here somewhereScroll up.. Its in here somewheremarkus reeveshttps://www.blogger.com/profile/05077618867315460278noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-68128767331418746402019-09-16T14:54:16.222+01:002019-09-16T14:54:16.222+01:00Hello ... Does anyone know Hfe values of Q1 and Q2...Hello ... Does anyone know Hfe values of Q1 and Q2 from the original RM?Andyhttps://www.blogger.com/profile/18428117698602506968noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-54167353605716540622017-01-28T16:07:54.439+00:002017-01-28T16:07:54.439+00:00I tried this mod (although I swapped different res...I tried this mod (although I swapped different resistors instead of using a trim pot) and found that values lower than 47k make the pedal sound more gated, like it's biased low and values near 60k make it sound more woofy. I settled at a 50k resistor which makes the Axis sound much more like the album version of Spanish Castle Magic and also like the various live recordings from around 1968. Who knows, but perhaps when Roger built Jimi's original pedal he was using those +/-10% resistors they used in those days and his 47k was in reality a 50k. Anyway, this is the third Axis I've built (I scrapped the last two), and along with this mod I also changed the 22k resistor to a 15K, which seems to give me more gain, which I asked about in my previous comment, and also improves the touch-response. I definitely recommend auditioning the transistors... I tried a few different 2N3906's and although the differences are't massive, it's worth spending half an hour or so selecting the best ones. This pedal is definitely a keeper now!pearl blueshttps://www.blogger.com/profile/00129004408197019836noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-27141187249001933322017-01-11T13:30:50.753+00:002017-01-11T13:30:50.753+00:00I recommend replacing the 47k res with a b50k pot ...I recommend replacing the 47k res with a b50k pot (as variable resistor).<br />±25k can clean more and give another kind of responseIvMhttps://www.blogger.com/profile/02555112437631034123noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-54100384159702809402016-12-27T21:14:02.279+00:002016-12-27T21:14:02.279+00:00Verified!
I would like to share my mod for tone......Verified!<br />I would like to share my mod for tone... How can I send it?<br />IvMhttps://www.blogger.com/profile/02555112437631034123noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-33411241813703218352016-11-21T14:01:13.748+00:002016-11-21T14:01:13.748+00:00This comment has been removed by the author.Valériehttps://www.blogger.com/profile/11183376203958778853noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-42471221810096005252016-09-24T12:26:40.514+01:002016-09-24T12:26:40.514+01:00Hi Zach, yes you're right, that'll be my f...Hi Zach, yes you're right, that'll be my first build haaa,<br />Indeed, this is often the same wiring, i found it after posting !!<br />Thank you for answering.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-16816005520288878092016-09-23T17:32:11.910+01:002016-09-23T17:32:11.910+01:00hi greg. i'm under the assumption that this is...hi greg. i'm under the assumption that this is your first build. before you do anything read the build guide, seen at the top, before building anything. it will explain how to build an effect.<br /><br />not to answer your question about the switch wiring. if you look at the top there is a tab labeled, offboard. this will show you how to wire nearly all effects. since it's the same in 95% of all pedals you won't see the switch wiring for any layouts, because it's redundant and a waste of time to put in every layout.Zachhttps://www.blogger.com/profile/00044917566185720896noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-35177456905625274492016-09-23T14:44:34.796+01:002016-09-23T14:44:34.796+01:00Hi all, i really would like making this fuzz, but
...Hi all, i really would like making this fuzz, but<br />how may i plug the footswitch? it's not mentioned<br />Thank youAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-67404919357506071382016-07-10T20:16:46.900+01:002016-07-10T20:16:46.900+01:00Take a look there:
http://www.tdpri.com/threads/ax...Take a look there:<br />http://www.tdpri.com/threads/axis-fuzz.290945/Unknownhttps://www.blogger.com/profile/05995014191345281045noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-89060300674602707492016-03-01T08:31:28.681+00:002016-03-01T08:31:28.681+00:00Hi folks
I look forward to assemble this. However,...Hi folks<br />I look forward to assemble this. However, someone may suggest how add a tone knob to the schematic please?<br /><br />Thanks in advance<br />GuidoAnonymoushttps://www.blogger.com/profile/07043027660571130858noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-24953522129183728772015-12-08T23:08:58.873+00:002015-12-08T23:08:58.873+00:00Hi sorry for taking such a long time to reply. I&#...Hi sorry for taking such a long time to reply. I've only just started working on my Axis Fuzz again, and the info in that link is really useful, thank you :)pearl blueshttps://www.blogger.com/profile/00129004408197019836noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-35063833455271869372015-10-27T10:13:02.838+00:002015-10-27T10:13:02.838+00:00Hi, one source tell about hfe in axis stock, Q1 11...Hi, one source tell about hfe in axis stock, Q1 118 and Q2 158.<br />It's hard to find 2N3906 and 2N904 in this range so piggyback it!!<br />I did it and get Q1 110 and Q2 140 and it sound (I feel) close to original now, <br />much more manageable and usable in all the fuzz pot range without excess or bad decay!<br />Use the tone pot on your guitar to control the high end like the volume for the fuzz, dark fuzz and perfect bright clean accessible to a single hand! This awesome circuit.<br />Thanks so much guys <br />Robhttps://www.blogger.com/profile/14447163726606171707noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-61073421469042671232015-06-13T02:03:54.714+01:002015-06-13T02:03:54.714+01:00I'd probably just say audition a few transisto...I'd probably just say audition a few transistors and see which ones sound best? They have the most control over the gain of the circuit I think. <br /><br />Maybe have a read through this thread for tips http://www.diystompboxes.com/smfforum/index.php?topic=27144.0;nowapAnonymoushttps://www.blogger.com/profile/06201678011261105677noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-4812708161106911792015-06-12T14:00:33.611+01:002015-06-12T14:00:33.611+01:00Hi I built this one recently from John Kallas'...Hi I built this one recently from John Kallas' layout above and it sounds great, but does anybody know how to modify the circuit to increase the gain? With my guitar volume down it sounds really good and gnarly and dynamic (great for playing the riff for Hear My Train A Comin) but I just want more gain for the solo. <br /> Anyway, thanks for your great site and I hope you are able to get going again soon with more layouts. Peace :)pearl blueshttps://www.blogger.com/profile/00129004408197019836noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-14553243298511310162014-07-10T20:17:34.019+01:002014-07-10T20:17:34.019+01:00This comment has been removed by the author.Anonymoushttps://www.blogger.com/profile/03551370005336623785noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-40557530960091857882013-10-15T20:55:43.985+01:002013-10-15T20:55:43.985+01:00I also found that matching the hfe's on the tr...I also found that matching the hfe's on the transistors makes it sound better (since it removes the fizzy decay). my 2N3906 measures 232 and I'm now using a 2N2222A for the 2N3904 which measures 234.johnkhttps://www.blogger.com/profile/00643996045674470081noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-8170334326993921092013-09-28T04:38:25.531+01:002013-09-28T04:38:25.531+01:00no prob.
yeah, it'll be more like an overdrive...no prob.<br />yeah, it'll be more like an overdrive with the instrument's volume down but this one is pretty much a fuzz overall.johnkhttps://www.blogger.com/profile/00643996045674470081noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-87425192083570631632013-09-28T04:00:38.543+01:002013-09-28T04:00:38.543+01:00Absolute apologies to you, John. I finally got it...Absolute apologies to you, John. I finally got it to work correctly. I guess I has some bad resistors and caps in there. Question, when I dial down the guitar volume, is it supposed to sound like an overdrive (sort of)?<br />Erichttps://www.blogger.com/profile/03331005267852079407noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-29628873038341529292013-09-26T17:10:23.018+01:002013-09-26T17:10:23.018+01:00the socket for the 1n cap is so that as an option,...the socket for the 1n cap is so that as an option, you can just remove it. alot of people prefer it without the 220R/1n in the circuit so if you remove the 1n, the 220R has no effect. I run mine without it.johnkhttps://www.blogger.com/profile/00643996045674470081noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-88762924224940989922013-09-26T14:51:35.571+01:002013-09-26T14:51:35.571+01:00So weird. I'll rebuild as I'm sure I miss...So weird. I'll rebuild as I'm sure I missed something. What are the voltages on the transistors supposed to be? Also, I had to combine, in series, a couple of resistors to get the 680k and the 820k which resulted in the 820k being 810k. I also used a 1kv .001 uf cap for the 1n, without a socket. Question - why the socket for that? Is it to be able to swap out with a different size at will? I like the idea.Erichttps://www.blogger.com/profile/03331005267852079407noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-78927624242789802042013-09-26T07:10:29.047+01:002013-09-26T07:10:29.047+01:00well, my vero (and IvIark's tagboard) follows ...well, my vero (and IvIark's tagboard) follows and matches all of the posted schematics that I've seen. like this one:<br /><br />http://johnkvintageguitars.homestead.com/Effects/Fuzz-ODs/RogerMayer/RogerMayerAxisFuzz.jpg<br /><br />my build of it sounds great. some people like to use a 25-50K trimmer for the 22K resistor for the collector on Q2 to dial it in even further, but that's the only mod besides an added tone control for it that I've seen. BTW, this one is not supposed to be a muff sounding fuzz.johnkhttps://www.blogger.com/profile/00643996045674470081noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-856270037153255852013-09-26T03:56:22.949+01:002013-09-26T03:56:22.949+01:00yeah. That's the one I modified. Initially i...yeah. That's the one I modified. Initially it didn't work so well. I'll check the board but, it just sounded dead, no offense. I noticed when I tested the connections that when I touched on where I put lug 2 of the drive, the fuzz came on full blast. It was more Muff sounding than I had expected.Erichttps://www.blogger.com/profile/03331005267852079407noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-18801236229533769632013-09-26T03:41:58.070+01:002013-09-26T03:41:58.070+01:00did you use the latest layout?
this one works perf...did you use the latest layout?<br />this one works perfect:<br /><br />http://johnkvintageguitars.homestead.com/Effects/Fuzz-ODs/RogerMayer/Axis_Vero_V2.pngjohnkhttps://www.blogger.com/profile/00643996045674470081noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-58899182623799255822013-09-26T03:34:31.886+01:002013-09-26T03:34:31.886+01:00http://i189.photobucket.com/albums/z230/ericandles...http://i189.photobucket.com/albums/z230/ericandleslie/Axis_Vero_V3_zpsef4c7da9.jpgErichttps://www.blogger.com/profile/03331005267852079407noreply@blogger.com