tag:blogger.com,1999:blog-6847048658257278783.post4820896721865761350..comments2024-03-29T01:36:12.851+00:00Comments on Guitar FX Layouts: Vox Repeat PercussionIvIarkhttp://www.blogger.com/profile/08416945174853142251noreply@blogger.comBlogger169125tag:blogger.com,1999:blog-6847048658257278783.post-13045276028878357872021-12-19T20:33:16.384+00:002021-12-19T20:33:16.384+00:00First of all. thanks to everyone here for posting ...First of all. thanks to everyone here for posting their experiences, it's been really useful in my build of this.<br /><br />I went with the third version (tone switch and speed switch)<br />I didn't find a great difference with the tone switch options, so just ended up with a fixed value in there (47n) <br /><br />I followed tomeunknown and changed the 47k resistor to 10k<br />I was hoping I might get away with a single speed capacitor, but ended up with 4.7u and 22u on a switch -there's a good cross over between the two, but the 22u gets me a very slow option - so you can get that "how does it feel" Spacemen 3 sound (down around 60bpm - ish) I was wondering if I should have changed that 47k to 33k instead like Papa Rob - but might have still needed a bigger cap to get sloooow.<br /><br />I started with the build in an effects loop of a Behringer V-amp and had really bad ticking with the guitar plugged in but not played. Taking it out of that loop and going direct solved it I think - but I also did the ozzy fix above to ground it better (I used row three from the bottom to 'connect' them and then ran a wire to ground on row 1)<br /><br />Great effect - thanks again,<br />caprenterhttps://www.blogger.com/profile/14406884757940145867noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-80949942131652281332021-11-07T20:27:44.837+00:002021-11-07T20:27:44.837+00:00Can I use a 2N6027 on this instead ? Can I use a 2N6027 on this instead ? Petehttps://www.blogger.com/profile/15646685728993255120noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-81425990138586228832021-06-29T12:32:59.097+01:002021-06-29T12:32:59.097+01:00hey folks, I'd like to build this on a breadbo...hey folks, I'd like to build this on a breadboard, is there a schematic of Ivlark's second modded version?MrNewbiehttps://www.blogger.com/profile/00434158780413249845noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-87898371027842622382021-05-27T12:04:02.074+01:002021-05-27T12:04:02.074+01:00Found a loose solder join! The initial attempt to ...Found a loose solder join! The initial attempt to separate grounds works!tomeunknownhttps://www.blogger.com/profile/16352227285629588593noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-5599651147443688312021-05-25T12:48:23.723+01:002021-05-25T12:48:23.723+01:00This comment has been removed by the author.tomeunknownhttps://www.blogger.com/profile/16352227285629588593noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-65469132660254033092021-05-25T00:25:35.099+01:002021-05-25T00:25:35.099+01:00This comment has been removed by the author.tomeunknownhttps://www.blogger.com/profile/16352227285629588593noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-20082016858886120292021-05-24T16:56:53.862+01:002021-05-24T16:56:53.862+01:00@tomeunknown - I'm borrowing some info that Al...@tomeunknown - I'm borrowing some info that Albert posted on 29 April 2021 about how he solved the "ticking" issue with the Frantone Vibutron build here --> https://tagboardeffects.blogspot.com/2014/04/frantone-vibutron.html<br /> <br />The solutions he offers might apply to the Vox Repeat ticking issue. There's no DIP IC used on the Vox Repeat but a capacitor placed somewhere strategic might be the answer. I've not had any free time to test any of his ideas.<br /><br />re: Frantone Vibutron:<br />"for anyone having issues with ticking i found that a non polar 1uf cap between pin 8 and 9 of ic3 completely eliminated it. got the idea here: https://sites.google.com/site/flofxdiy/deticking-lfo <br /><br />theres some useful stuff for debugging lfo ticking in general"The_Peddlerhttps://www.blogger.com/profile/07267867702463011607noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-81330613753543405792021-05-24T11:08:43.045+01:002021-05-24T11:08:43.045+01:00Hello!
I've just built this with some of the ...Hello! <br />I've just built this with some of the mods mentioned throughout this thread.. namely, changing the 47k resistor to 10k, changing the 10u cap to 4.7u.. I also changed the input cap to 100n. It sounds great except for the deep ticking.. this is what ive tried: lifting the 33R ground leg and the 4.7u ground leg, connecting theses then running a wire direct to the power source ground. I tried the above with the 4.7u still in the Vero ground strip as well. I've tried connecting both ground wires to different parts of my test box.. no luck. any help would be appreciated... cheers<br />tomeunknownhttps://www.blogger.com/profile/16352227285629588593noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-24609204861733932012020-01-29T15:15:11.815+00:002020-01-29T15:15:11.815+00:00Hello people.
I just built one of these (with dept...Hello people.<br />I just built one of these (with depth pot) and also using another layout as a reference (http://effectslayouts.blogspot.com/2015/01/vox-repeat-percussion-tremolo.html#comment-form). I then used a BC108 transistor as Q2 and a BC109C as Q3. It works but I have the following problem at the extremes of the rate: the fastest speed is very slow. Really slow! Then I put an LED (between 9v, with a 10K resistor, and the emitter of Q1) and then the slowest speed is very fast. The LED flashes according to the set speed, which is something I really wanted. But as for the rate problems, could someone help me, please? Thanks.Velhinho-RJhttps://www.blogger.com/profile/12749907495231526432noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-75734254121165604742020-01-23T10:16:20.252+00:002020-01-23T10:16:20.252+00:00Hi All. What transistors could I use instead off M...Hi All. What transistors could I use instead off MPSA18??? Thanks.Velhinho-RJhttps://www.blogger.com/profile/12749907495231526432noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-13519151307156883482019-05-16T12:34:46.933+01:002019-05-16T12:34:46.933+01:00Just completed the repeater with mods : sounds per...Just completed the repeater with mods : sounds perfect, at first I did not get any effect but this was beacause of shit 2N2646 bought on Aliexpress...Replaced it with a good one and everything works. This is a cool vintage effectLordSvenhttps://www.blogger.com/profile/08201338099067826128noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-49851005029733881592019-04-25T08:43:42.199+01:002019-04-25T08:43:42.199+01:00I've boxed this one and sound perfect. Cool an...I've boxed this one and sound perfect. Cool and sweet tremolo!<br /><br />I've done the mods that someones said in this post and get better much. Mods: 10u cap-- 4.7u, and 47kresistor--4.7k.<br />The only problem, there is a little and deep permanent noise that i can`t delete.<br /><br />Love this pedal!<br /><br />thanks ivlark for this circuit!Chestertonhttps://www.blogger.com/profile/06398639041943318723noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-20372827533257423212019-03-21T02:40:49.991+00:002019-03-21T02:40:49.991+00:00Hi. You need to separate the LFO ground from the r...Hi. You need to separate the LFO ground from the rest. Let me know if you need some helpAntoniohttps://www.blogger.com/profile/15088749141506941654noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-40051197169777441812019-02-05T22:17:07.236+00:002019-02-05T22:17:07.236+00:00Update,
It works, no idea what the problem was.
...Update, <br />It works, no idea what the problem was. <br /><br />I still have a rythmic ticking, especially with the depth pot down.<br />Any idea how to fix this?Sevrienhttps://www.blogger.com/profile/11595788022610356016noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-26612605422438142682019-01-29T07:25:18.533+00:002019-01-29T07:25:18.533+00:00hello,
I just built mine.
But as expected, it'...hello,<br /><br />I just built mine.<br />But as expected, it's not working right away.<br />I get a buzzing tone on the output, the freuquentie of that tone changes when turning the rate pot.<br /><br />I checked the transistor orientation, traces, ground, etc.<br />Not sure where to search now.<br />I'll probe the thing somewhere next week but if anyone has an idea to save time, feel free to advice me.<br /><br />Greetings.Sevrienhttps://www.blogger.com/profile/00573171664043271233noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-16991458151255137912017-11-11T01:26:40.134+00:002017-11-11T01:26:40.134+00:00How to get rid of the loud and permanent ticking:
...How to get rid of the loud and permanent ticking:<br />- lift the 33R resistor leg off the board's ground row and connect it to the 10u capacitor negative.<br />- then run a wire from that junction to the power supply negative.<br /><br />Basically, no part of the ciruit can share the trace between the 10u cap negative and the 33R resistor. Otherwise it will tick.<br />I hope it helps.<br />ozzyhttps://www.blogger.com/profile/05831948265990111040noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-69193983178545540672017-06-05T04:44:21.643+01:002017-06-05T04:44:21.643+01:00ok, hi IvIark and miro and crew
i built this thing...ok, hi IvIark and miro and crew<br />i built this thing tonite. nice easy build. i carved it down slightly and managed to fit it across a 1590a, flying leads to the tracks instead of thru hole. once it was closed and working, i'll never open it again ;)<br />works tit... but a couple points i noticed.<br />one, 4.7n for an input cap is way too little i think, 47n is right about right. 100n is fine but for me, i don't need the extra octave of bass.<br />two, following the convention of pots being seen from the back with the lugs pointing right of the top one being 3, bottom 1, both pots as shown in the layout with the speed and tone switches in it are backwards. may be why some folks aren't or weren't getting any sound. if ya crank 'em up all the way as shown, it does nothing. at least until ya turn the pot down. ;)<br />3... the speed cap being 4.7u for the fast speed is too big. 2.2u gets ya a more useable range of speed. 100u is so slow the oscillation can stall. i'd go with 4.7u for the slow speed, and 2.2u for the fast speed. or add a three way switch and go with a 1u too, then ya can almost ring mod with it.<br />just my observations, YMMV and probably should. ;)<br />i'm going by all the repeat percussions i've played with in the past when i still messed with organs (and the ludwig phase II one) and to me, seems to make more sense to go faster than slower with it.<br />anyways.. as always, awesome project, and<br />thanks!!<br />PjP<br />pinksterhttps://www.blogger.com/profile/13385798043782856976noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-43949856272821565162017-05-16T16:49:36.319+01:002017-05-16T16:49:36.319+01:00saw one of these broke on fleabay, so i figured i&...saw one of these broke on fleabay, so i figured i'd check here for a layout, which of course was done YEARS ago so not gonna bid, gonna build instead..<br />to me? this suckah is screamin to be in a wah housing ;)<br />i read about half the thread, anybody find any common q's that will work in this thing? or are the originals a must have?<br />just curious...<br />rock on builders<br />PjPpinksterhttps://www.blogger.com/profile/13385798043782856976noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-47228891614636087772017-01-17T04:15:39.299+00:002017-01-17T04:15:39.299+00:00I been meaning to build this circuit for a while n...I been meaning to build this circuit for a while now. Even bought some 2n2647 UJTs to do it (uh, no mistake there... I guess they must have been cheaper, so I got some...) I wanted to report that they work the same as 2n2646 as far as I can tell. Results are fun. I used an 18n input cap, which makes it sound lo-fi as hell if you push it at all.. if you want to write a song about sipping your last pint of cheap whiskey to fend off the DTs as you lay in a dirty, wet alley at night, this would be the sound. BTW, I think there's an unnecessary cut in the layout, third row from the bottom. Also, definitely do not use 47K going into the rate pot, use something more like 4k7 (although that turned out to be too small on my version, no big deal, it's just that the knob maxes out and then actually stops doing the effect at all). Using a small value like that you can still get plenty of slow, but also more speed than can be handled. No promises but if I get then chance, maybe I'll put a demo together.Zack Faccohttps://www.blogger.com/profile/00618591820637998919noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-77679031089343461542017-01-17T04:13:32.295+00:002017-01-17T04:13:32.295+00:00This comment has been removed by the author.Zack Faccohttps://www.blogger.com/profile/00618591820637998919noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-54180527282889421182016-10-01T13:10:30.203+01:002016-10-01T13:10:30.203+01:00Hi guys,
I know this build is from a while back b...Hi guys,<br /><br />I know this build is from a while back but I've been tinkering with mine recently and got some very cool results.<br /><br />I built Version 1 (as above) but with a switch in place of the 10uF cap (DPDT On/On) allowing to switch between a 10uF and a 3.3uF. And in place of the 47K resistor joining Rate 1&2 to the emitter of Q1 I used a 33K.<br /><br />With this combo I managed to get speeds ranging from 90bpm at the bottom end when 10uF is selected and up to a very fast flutter (I'd say ~800bpm) when the 3.3uF is selected and maxed out. The really cool thing is that the combination of 10uF and 3.3uF has zero crossover and they meet perfectly at 250bpm.<br /><br />With a 4.7uF in place of 3.3uF I was getting about 50bpm of redundancy (4.7uF would bottom out at 200bpm) but 3.3uF bottoms out exactly where 10uF maxes out. I'm not sure if everyone can expect this or if it's just my good luck with the 2N2646 I purchases.. maybe it's even the 33K helping? I'm not 100% sure. I just know it sounds killer, has a huge range and has no redundancy.<br /><br />Anyway, perhaps that mod will work for someone else. I'm going to try building a second one for a friend and see if I can replicate it.Papa Robhttps://www.blogger.com/profile/13284688342714173642noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-61260426174713961122016-04-28T19:02:42.560+01:002016-04-28T19:02:42.560+01:00Thanks for your mod! It's awesome. I already b...Thanks for your mod! It's awesome. I already built 2, and both had the switch. With the switch you dont know at what speed you will be and there could be overlap. This works like a charm and saves space! The fastest pace is so fast now it's a whole other effect on top of the already great sounds. As stated above: Highly recommended!Marchttps://www.blogger.com/profile/01190587665881779153noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-51602406024081291222015-04-12T18:28:33.847+01:002015-04-12T18:28:33.847+01:00You have done a great job there Franck. That plex...You have done a great job there Franck. That plexi top is great, good to see a tidy and interesting internals<br />Well done dbat69https://www.blogger.com/profile/11868011846474702140noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-60983177616316616042015-04-12T09:37:40.167+01:002015-04-12T09:37:40.167+01:00https://imageshack.com/a/6NXz/1https://imageshack.com/a/6NXz/1Anonymoushttps://www.blogger.com/profile/11143754320129280728noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-44727202586220575022015-04-12T09:36:58.385+01:002015-04-12T09:36:58.385+01:00all is ok, the 2n2646 was at reverse !
The fourth ...all is ok, the 2n2646 was at reverse !<br />The fourth stomp boxes work very good now ! if you want to see my work, it's finished !<br /><br />FranckAnonymoushttps://www.blogger.com/profile/11143754320129280728noreply@blogger.com