tag:blogger.com,1999:blog-6847048658257278783.post4833514095459742243..comments2024-03-29T01:36:12.851+00:00Comments on Guitar FX Layouts: VFE Pedals TriumvirateIvIarkhttp://www.blogger.com/profile/08416945174853142251noreply@blogger.comBlogger37125tag:blogger.com,1999:blog-6847048658257278783.post-75886624521519860062021-01-21T13:46:41.310+00:002021-01-21T13:46:41.310+00:00I believe the cathodes of D3 and D5 and the anodes...I believe the cathodes of D3 and D5 and the anodes of D4 and D6 should all be connected to one other. <br /><br />The simplest fix is to add a bridge across the D4 anode and the D5 cathode. Or, move the D3 cathode down 1 row and create a double link so to speak from the D3 cathode (now on row 4) up one to row 3 (where the D3 cathode used to be)MAOhttps://www.blogger.com/profile/16009444316767677263noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-50052475925097869222017-03-23T17:23:38.106+00:002017-03-23T17:23:38.106+00:00Thanks,mate!
You are right. There's a cut miss...Thanks,mate!<br />You are right. There's a cut missing there.<br />I'll correct it.Alexhttps://www.blogger.com/profile/02431893143306628176noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-50910052505324562272017-03-23T16:07:15.945+00:002017-03-23T16:07:15.945+00:00Hi, from France! First post here, great site, i to...Hi, from France! First post here, great site, i took a lot from it, huge thanks, you're awesome! I just want to try to help back, as i noticed a cut missing, IMHO (i'm no master builder at all, but for me it worked!). I experienced problems with alimentation, sound cutting off, kinds of chopping tremolo, strange behavior in general, and i found something: to me, pins 7 and 8 of the down 2074 (outputs to the pre trimmer, and to the bass transistors) shouldn't be connected, there should be a cut in between, just above the 220n cap to the left of the low 1 trimmer. Anyway, it worked for me... Hope it helps!A-C Grasshttps://www.blogger.com/profile/15726225241966890038noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-74679668739982005212016-09-23T13:19:55.053+01:002016-09-23T13:19:55.053+01:00Cheers Alex. Will need to order some in.Cheers Alex. Will need to order some in.Hozy31https://www.blogger.com/profile/16714771534041521767noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-86827010019183465402016-09-15T19:07:21.923+01:002016-09-15T19:07:21.923+01:00I've been waiting for this!!!! Now to see if i...I've been waiting for this!!!! Now to see if it sounds exactly like my 1st-Gen or my Final-Run Triumvirate.Inane in the Membranehttps://www.blogger.com/profile/14918662039246363004noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-881250565147908082016-09-09T09:56:04.067+01:002016-09-09T09:56:04.067+01:00Hi Gavin.
Can you try to sub the 10uF cap at the b...Hi Gavin.<br />Can you try to sub the 10uF cap at the bottom of the board with a bipolar 10uF cap to see if it fixes your problem?<br />That's what Brian suggested but I thought it was a regular elctr. cap on the schematic.Alexhttps://www.blogger.com/profile/02431893143306628176noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-34892012995583196542016-09-08T18:22:25.248+01:002016-09-08T18:22:25.248+01:00Must add after playing for a bit that its a very u...Must add after playing for a bit that its a very useable and tweakable distortion which IMO has a really nice sound. Found the tick is only present when Bass Gain is maxed.<br />Thanks Alex.Hozy31https://www.blogger.com/profile/16714771534041521767noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-50960409820908565532016-09-08T18:06:47.119+01:002016-09-08T18:06:47.119+01:00Haven't a clue what happened but all the probl...Haven't a clue what happened but all the problems just vanished when i plugged it in. Must of had a rogue bit of copper or something floating about. Still get an unusual random tick in the background when pedal engaged but not playing. Other than that it seems verified.<br />Hozy31https://www.blogger.com/profile/16714771534041521767noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-53702284883298906852016-09-08T09:50:41.374+01:002016-09-08T09:50:41.374+01:00Not a stupid question.
I just swapped pins to draw...Not a stupid question.<br />I just swapped pins to draw a smaller layout.<br />Swapping pins 1-2-3 with 5-6-7 would give the same result.<br />I do it most of the time.<br />Schematics come from PCBs most of the time.<br />Sometime changing IC's pins helps drawing a smaller layout.Alexhttps://www.blogger.com/profile/02431893143306628176noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-88041108375633480132016-09-07T17:27:43.042+01:002016-09-07T17:27:43.042+01:00Should the circuit from the IN not goo to 1k, 220n...Should the circuit from the IN not goo to 1k, 220n, 2.2M to ground and then to pin 3 of IC1? At the moment i see it going to pin 5. Is that correct or am i missing something? Also should the 220n, 22n and two Lo Mids not go to pin 5? Sorry if this is BS as my schematic reading skills are quite basic.Hozy31https://www.blogger.com/profile/16714771534041521767noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-62690287819088969282016-09-07T14:58:58.461+01:002016-09-07T14:58:58.461+01:00Did you double check the schematic?
Should be ok b...Did you double check the schematic?<br />Should be ok but you never know.<br />What are your voltages?Alexhttps://www.blogger.com/profile/02431893143306628176noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-37529719770743105562016-09-04T13:03:13.393+01:002016-09-04T13:03:13.393+01:00Ok, got something weird going on. The pedal seems ...Ok, got something weird going on. The pedal seems to power off by itself and makes a thump sound and then powers back on again. Only does it in a millisecond but its really annoying. It also only seems to do it with bassier strings. Checked all the usual culprits, shorts, component placement, etc. but no luck. Any ideas?Hozy31https://www.blogger.com/profile/16714771534041521767noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-77972753762523314382016-09-03T17:32:05.747+01:002016-09-03T17:32:05.747+01:00So built this up using TL074s and it worked but it...So built this up using TL074s and it worked but it was very glitchy and didn't sound correct. Had one spare TLE2074 so took the other one out my VFE Dark Horse and it sounded a lot better. Still has some glitchiness but those trimpots are a challenge in themselves.<br />Cheers Alex & VFEHozy31https://www.blogger.com/profile/16714771534041521767noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-73976481484946397172016-09-03T09:03:30.727+01:002016-09-03T09:03:30.727+01:00I agree.
Could use TL074 just to test it while wai...I agree.<br />Could use TL074 just to test it while waiting the original ICs.Alexhttps://www.blogger.com/profile/02431893143306628176noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-49727421537995866892016-09-02T19:14:14.762+01:002016-09-02T19:14:14.762+01:00aliexpress you can get 10 for 9 dollars.The tle207...aliexpress you can get 10 for 9 dollars.The tle2074 is a way better chip and sounds a lot better. It has much more range for gain and EQAnonymoushttps://www.blogger.com/profile/09475485559085932632noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-35758144744678694692016-09-02T17:50:09.882+01:002016-09-02T17:50:09.882+01:00has anyone built this and have it working??has anyone built this and have it working??Anonymoushttps://www.blogger.com/profile/02519375275213556637noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-31470645634231893212016-09-01T10:51:39.386+01:002016-09-01T10:51:39.386+01:00I think TL074 may sound slightly different but sho...I think TL074 may sound slightly different but should still work. Do you have voltages?Alexhttps://www.blogger.com/profile/02431893143306628176noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-54666593368889762432016-09-01T10:19:00.079+01:002016-09-01T10:19:00.079+01:00From the schematic:
BASS MOD - Double the value o...From the schematic:<br /><br />BASS MOD - Double the value of LOW, LO MID, and HIGH<br />trimpots. HI MID trimpots are 5K & 50K. PRE trimpot is 5K.<br /><br />BOOST MOD - Remove all clipping components. Change<br />GAIN trimpots to A100K.<br />AlexShttps://www.blogger.com/profile/05624907590644025643noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-54217221618674204042016-09-01T09:58:41.422+01:002016-09-01T09:58:41.422+01:00if someone here has time and interest, I would lov...if someone here has time and interest, I would love to get the multiband outs separately, and make a pedal of that (without the distortion part) = one input, three outputs so I could use the multiband outs to drive different fuzz/overdrive/distortion/chorus/compressor chains. Jesse Jhttps://www.blogger.com/profile/12523457245535210673noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-55858388237340179562016-08-31T23:44:41.233+01:002016-08-31T23:44:41.233+01:00Gotta order a few. Do you have it working?Gotta order a few. Do you have it working?Anonymoushttps://www.blogger.com/profile/02519375275213556637noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-25418944652329140702016-08-31T18:48:48.183+01:002016-08-31T18:48:48.183+01:00Jeff, i think you need TLE2074 ICs for this not TL...Jeff, i think you need TLE2074 ICs for this not TL074s.Hozy31https://www.blogger.com/profile/16714771534041521767noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-14747855186789783332016-08-31T18:09:05.747+01:002016-08-31T18:09:05.747+01:00voltage settings on trimmers??voltage settings on trimmers??Anonymoushttps://www.blogger.com/profile/02519375275213556637noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-42668668637115602512016-08-31T18:00:57.533+01:002016-08-31T18:00:57.533+01:00UGH! I 'm using TL084's..is that maybe why...UGH! I 'm using TL084's..is that maybe why no effect signal at all. no debugging yet as I built the board with the pix downsized and attached. probly my 200th build too so joints look good. 7660s is good. again can I use 074's/084's theoretically speaking?<br />Anonymoushttps://www.blogger.com/profile/02519375275213556637noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-18012277733852120132016-08-31T17:54:00.311+01:002016-08-31T17:54:00.311+01:001) build complete. It passes a clean signal. Break...1) build complete. It passes a clean signal. Break time. Back in a few to see if (as Mr. Wilder would say) "It's aliiiiivve."Anonymoushttps://www.blogger.com/profile/02519375275213556637noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-54145529637700554462016-08-31T16:27:15.288+01:002016-08-31T16:27:15.288+01:00how would I add an 'over all' volume to th...how would I add an 'over all' volume to this? as if 6 knobs aint enuff.Anonymoushttps://www.blogger.com/profile/02519375275213556637noreply@blogger.com