SMF for DIYStompboxes.com!
Started by Thomeeque, June 03, 2011, 09:27:39 AM
Quote from: Valentinych on September 01, 2011, 07:02:46 AMP.S. I hope, Thomas will not object to …
Quote from: Thomeeque on September 01, 2011, 07:52:44 AM Hmm, haven't you forgot to solder jumper connecting right* node of R30 and pin 2 of IC4 (LM311) by any chance (short one close below** LM311)? T. Btw. hi-res photos from both sides of PCB could help here too.* on schematic** on layouts
Quote from: Keeb on September 01, 2011, 08:39:11 AMBreakthrough though! I found a solder bridge and when I removed it I got a wailing sound flanging in flanger mode and constant in filter mode. The guitar signal is still clean though. Pots seem to work as they change the sound of the wailing in an expected manner.I retried measuring IC5 pin 1 and 2 they now measure about 4.05 each now (regardless of switch position) and these values appear stable at pin 2 and 6 on the MN3207 as well.Pin 3 on IC5 now measures 6.42 in filter mode and varies between 6.5 and 2.8 in flanger mode.
Quote from: Keeb on September 01, 2011, 10:43:03 AMspeed does nothing...
Quote from: Thomeeque on September 01, 2011, 10:49:01 AM Did you add LOG/EXP jumper (Build Notes, bullet 7)? T.
Quote from: Keeb on September 01, 2011, 10:43:03 AMHowever, when I adjust RT1 above 8 o' clock (using 7 o' clock as all the way down) a wail appears and it's "flanging", regardless if guitar signal is present or not. It gets worse when adjusting RT1 even higher and goes away when lowering POT1/COLOR until there is just a clean guitar signal.
Quote from: Keeb on September 01, 2011, 11:50:12 AMGuess what? I didn't! Know it does work as long as RT1 isn't set too high!But maybe that's normal?
Quote from: Keeb on September 01, 2011, 11:50:12 AMI can't thank you guys enough./Erik
Quote from: Ummagumma on September 05, 2011, 07:58:33 AM3207 versionHere's small preview of what it sounds like:http://www.box.net/shared/y00q7tinbvrees9f2zsaThanks Thomeeque and all of you guys!
Quote from: Thomeeque on September 06, 2011, 05:16:00 AMYes, you can! Make photos, sound samples, videos etc. of your unit and post here, that's what would make me happy most Cheers, T.
QuoteI recorded these clips with a LTD EC-400VF through a 15w practice solid state amp by using my iPhone 4 voice memofunction. Not optimal but at least you can hear the flanging.Clean was done with neck pickup (SD-'59) and a DIY belton brick reverb pedal after the flanger.Distorted was done with bridge pickup (dimarzio x2n) throughTonepad's Dist+ (level max; distortion 12 'o clock) through flanger and then the reverb again.
Quote from: GodSaveMetal on September 09, 2011, 01:49:32 PMOK thanks for the recommendations man I've to resold the EM3207 in the jumpers sections and desolde the VCC 100nF caps too; finishing my EM3007; to compare the sound; the EM3207 only have the sound trough it; no flanger effect !!!! well I have to change some parts and next week I will do some probes; the Jorge's adaptation of these in the large PCB is great but is so big!!!! these is more compact, I made the flanger/filter matrix a footswitch:The footswitch are DIYer; the case are DIYer, all is hand made; the adhesive is my design; the transparent cover I made myself!! it is pure DIY on all my pedals!
Quote from: oldschoolanalog on September 09, 2011, 08:26:04 PMSorry, but after following this thread from it's inception I have to do/say this...THIS IS A PUBLIC SERVICE ANNOUNCEMENT! PLEASE READ THE FOLLOWING:Tomas has put more time and effort into this; and all the other projects he has posted; than can be expected from any one person. All are "good to go" and verified working.PLEASE, PLEASE, PLEASE read the entire pdf/build & calibration notes before embarking on any of his projects. He has spent countless hours testing and writing so folks can get things right. If you read and follow his instructions; and build with care (no sloppy rush jobs, y'all hear?) there is no reason this should not work properly. Hell, check out the TDA1022 based EM he designed. This MN3207 EM is child's play compared to that. And even a hack like myself got that going on the first shot (IMHO, it sounds better too[the EM/TDA1022 that is...] ).Read the pdf/notes till you really "own" it/them. Then proceed. Some folks will hate me for saying this now; but will thank me later. Thank you, and happy soldering! You may now return to your regularly scheduled program...
Quote from: njkmonty on September 13, 2011, 07:59:50 AMHope I can ask a question without a big "public service announcement" hammered after it! already done the ada build, was going to give this a go,Have had a light read over the thread, but just wondering was there a preferred build? mn3207 or mn3007? or no notable, sound differences , only voltage requirements.
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