tag:blogger.com,1999:blog-6847048658257278783.post2241624214533762343..comments2024-03-29T01:36:12.851+00:00Comments on Guitar FX Layouts: Boss CE-2BIvIarkhttp://www.blogger.com/profile/08416945174853142251noreply@blogger.comBlogger33125tag:blogger.com,1999:blog-6847048658257278783.post-88060334379972591722022-01-17T17:46:12.888+00:002022-01-17T17:46:12.888+00:00Hi there,
I have built this but am not getting an...Hi there,<br /><br />I have built this but am not getting any chorus effect, just the dry signal. The LFO appears to be working as the LED changes Rate depending on the Rate Pot and the additional mod from Mirosol with the DPDT Switch to change the rate of the chorus further. I used a 2M2 and a 392k resistor on each side with the original 1M on board. <br />I also linked out the vibe switch and added a 10k resistor to ground from the other side of the resistor connected to LED + after seeing the LED stop working. I have 2k2 going to LED +<br /><br />I wonder if this is a simple link problem or perhaps something else has happened. Can post IC and Transistor Voltages if helps. <br /><br />Many thanks for all your hard work. Incredible really.<br /><br />PatrickPadsterhttps://www.blogger.com/profile/12331513054115959206noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-31595174686153755952017-08-22T09:27:46.238+01:002017-08-22T09:27:46.238+01:00Hi.
An oscillation sounds.
And the sound of the ef...Hi.<br />An oscillation sounds.<br />And the sound of the effect is weak.<br />What could be the problem?<br />Does anyone have transistor voltages and ICs?<br />Thank youKorahttps://www.blogger.com/profile/00011453348408160933noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-25118574876463521142017-01-27T02:56:17.560+00:002017-01-27T02:56:17.560+00:00thats the transistors. since you don't know wh...thats the transistors. since you don't know what the transistor is on the layout i assume you haven't built many, if any effect before. assuming that i would highly suggest that you build something easier for your first build, as this is very complex by comparison.Zachhttps://www.blogger.com/profile/00044917566185720896noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-3451734457267669932017-01-27T01:03:17.632+00:002017-01-27T01:03:17.632+00:00What are these "CBE" components?What are these "CBE" components?Anonymoushttps://www.blogger.com/profile/05878468813462034848noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-21815577128213685152016-10-31T21:11:59.285+00:002016-10-31T21:11:59.285+00:00Reckon you'll ever post that ce3 layout? Im dy...Reckon you'll ever post that ce3 layout? Im dying to make a mn3207 chorus Anonymoushttps://www.blogger.com/profile/17203744034712630403noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-34899367812394403902015-10-08T21:59:55.559+01:002015-10-08T21:59:55.559+01:00I've built one. Check my notes a few comment p...I've built one. Check my notes a few comment posts up.<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-14051281505291400602015-10-08T19:55:22.503+01:002015-10-08T19:55:22.503+01:00Gentlemen. Has anyone verified this oldie? If not ...Gentlemen. Has anyone verified this oldie? If not I will be tackling it in a month or two.<br /><br />Cheers!Anonymoushttps://www.blogger.com/profile/10415930189610972727noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-26102249368735665222014-11-15T05:37:50.441+00:002014-11-15T05:37:50.441+00:00What should I be seeing at Q1?What should I be seeing at Q1?Rhophttps://www.blogger.com/profile/10193004699151560102noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-38608000644773656912014-11-15T04:26:34.593+00:002014-11-15T04:26:34.593+00:00This has an input buffer so I'm not sure what ...This has an input buffer so I'm not sure what the problem could be, unless this buffer works better with a low impedance output from another buffer. Are you voltages all ok or does anything look suspect around Q1?IvIarkhttps://www.blogger.com/profile/08416945174853142251noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-84673633067036943102014-11-15T02:26:27.547+00:002014-11-15T02:26:27.547+00:00Hey guys...I've noticed something odd with the...Hey guys...I've noticed something odd with the pedal...if I plug it in after a buffered pedal, everything works flawlessly. But without a buffer in front, it loses a Large amount of signal and gives a wooshing sound when bypassed...any ideas?Rhophttps://www.blogger.com/profile/10193004699151560102noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-49222894992932872922014-11-12T18:36:16.997+00:002014-11-12T18:36:16.997+00:00I'll be adding a mod for these soon, thanks to...I'll be adding a mod for these soon, thanks to Miro for sharing the infoIvIarkhttps://www.blogger.com/profile/08416945174853142251noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-73156272299761258082014-11-12T15:49:47.397+00:002014-11-12T15:49:47.397+00:00I've also noticed that the 100n at the bottom ...I've also noticed that the 100n at the bottom of the layout also affects the maximum rate. Lowered it to about 80n to push the pedal just into Leslie-esque territory. Has a nice ramp-up too...might put that on a footswitch next time for a "fast/slow" leslie deal...Rhophttps://www.blogger.com/profile/10193004699151560102noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-68819694326875731572014-11-12T15:20:29.698+00:002014-11-12T15:20:29.698+00:00I thought i'd share a few notes.. Build this a...I thought i'd share a few notes.. Build this about a week ago with 33n instead of 12n for guitar values. The enclosure for this circuit has its clearcoat on and i'll just wait 'till tomorrow for it to dry. Anyway. Been playing with the circuit on my test box and noticed couple of things that i felt that needed to be addressed. The chorus/vibe switch is unusable with effect mix pot. As the switch in vibe position cuts the clean signal from getting to the output mixer amp, there's nothing for the effect mix pot to mix the chorused signal with. Meaning that the pot in vibe mode acts just as a volume - from clockwise = unity to lower levels. This being the case, i just soldered a piece of wire to bypass the chorus/vibe as always on chorus mode.<br /><br />Next up was the LFO rate. I've always felt that too slow LFO speeds are annoying feature of all Boss choruses. As we have a depth switch that changes the depth between stock and wild detuned depths, i thought why not do the same thing for the LFO rate range. The 1M resistor coming from Rate 2 to IC2 pin 6 is the one component that determines the range of our rate pot. So i took it out and put 1M and 270K resistors on a 2PDT On-On switch. The 1M side gives the stock range, while 270K changes the pot sweep from slow to near ring mod speeds.<br /><br />A few months back i built Madbean's Pork Barrel PCB and noticed that using a pulsing LED to get more depth mod was a bad idea. The additional depth kills the greatness of the chorus. Besides this layout has a switch for it.. So i decided to see if the LFO was strong enough to drive the LED in parallel with 4K7 without adding any depth. I soldered the stock value of 4K7 from between D1 and 22K LED resistor to ground and swapped the 22K for 8K2. Yup. It drives my 5mm white LED with no issues and still has the depth as stock.<br /><br />That's it. Possibly the greatest analog chorus one can build.<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-56648588327669266342014-10-21T22:51:50.875+01:002014-10-21T22:51:50.875+01:00And after running a razor blade between all the tr...And after running a razor blade between all the tracks, it's working. Must have had a bridge somewhere...<br /><br />This thing sounds really good. One thing though...on some settings I'm getting quite a bit of..clock noise? ticking? I don't know the right terminology for it. It's a ticking in time with the Rate. Could that just be my sloppy test wiring (don't have it boxed...it's a bit of a mess right now)? It's only Really noticeable on the higher speed settings...<br /><br />-RyanRhophttps://www.blogger.com/profile/10193004699151560102noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-37396540259654485942014-10-21T05:48:43.052+01:002014-10-21T05:48:43.052+01:00Okay...so I populated the board, hooked up the in/...Okay...so I populated the board, hooked up the in/out/ground/9v, pots and vibe switch (ditching the Intensity switch)...power it up, and I'm getting some weird gated distortion. Pretty quiet as well. When I flick the Vibe switch one way, I get that distortion. The other way, just my clean guitar..kind of. It seems like the mix knob still adds a bit of distortion to it, so I'm assuming that's the normal mode, with the more intense mode being the Vibrato mode.<br /><br />Where should I set the pots when checking pin voltages on the IC's and trannies? Do you have any idea what could be causing this? Trim pot is set so the reference voltage is 4.5V +/- 0.1V on all IC's.<br /><br />Thanks in advance for any help you can offer.<br /><br />-RyanRhophttps://www.blogger.com/profile/10193004699151560102noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-85172685039717754702014-10-21T01:27:57.999+01:002014-10-21T01:27:57.999+01:00curious to know if anyone can officially say this ...curious to know if anyone can officially say this is a verified layout? would nice to have another verified bass pedal. Zachhttps://www.blogger.com/profile/00044917566185720896noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-12743802233849131852014-09-09T00:24:46.702+01:002014-09-09T00:24:46.702+01:00Just wondering...will a 200k rev log pot work for ...Just wondering...will a 200k rev log pot work for the Effects Level? Tayda only carries 200k and 500k, no 250k. Thanks again.Rhophttps://www.blogger.com/profile/10193004699151560102noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-69158850413897317692014-09-06T12:56:23.244+01:002014-09-06T12:56:23.244+01:00You can connect the top of that 47K to the mix pot...You can connect the top of that 47K to the mix pot in any way you like, but to have an open path to the second row you'll need to shift around other components which may be a pain if you have that part of it built up already. If you haven't got that part built up yet then you can do it exactly as per the CE-2B but with CE-2 values for the cap preceding the 47KIvIarkhttps://www.blogger.com/profile/08416945174853142251noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-411477737007499982014-09-06T05:23:22.210+01:002014-09-06T05:23:22.210+01:00Also, couldn't I just add the cut on Row 2 and...Also, couldn't I just add the cut on Row 2 and then remove the old 47K and solder a new one between rows 2 and 9 like in the CE-2B layout? And then connect the two Effects Level wires as normal?Rhophttps://www.blogger.com/profile/10193004699151560102noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-14907443594048988152014-09-06T04:58:34.950+01:002014-09-06T04:58:34.950+01:00Thanks for the quick reply Mark! You're a life...Thanks for the quick reply Mark! You're a lifesaver.Rhophttps://www.blogger.com/profile/10193004699151560102noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-6956839346792401012014-09-06T04:03:48.181+01:002014-09-06T04:03:48.181+01:00You can do it, but it will be a bit of a chop job....You can do it, but it will be a bit of a chop job. Just disconnect the top of the 47K which connects to IC1 pin 6, and solder a wire from it directly to Effect Level 3, then connect Effect Level 2 to the right hand side of the 6n8 on the IC1 pin 6 row. That's it.IvIarkhttps://www.blogger.com/profile/08416945174853142251noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-9433967660663538242014-09-06T03:20:22.675+01:002014-09-06T03:20:22.675+01:00Hey Mark, just wondering if I can just add the 2 l...Hey Mark, just wondering if I can just add the 2 leads for the mix control from this layout to the same spots on the regular CE-2 layout. I noticed this layout has a few differences in component location, but i've already got my board almost done and adding the mix control was an afterthought. Thanks.<br /><br />-RyanRhophttps://www.blogger.com/profile/10193004699151560102noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-8042766212251385602014-07-04T07:11:45.583+01:002014-07-04T07:11:45.583+01:00BTW - I used a DPST toggle for the filter caps, wi...BTW - I used a DPST toggle for the filter caps, with a 12nf which is always in (for bass spec) and a 22nf in series with the switch (which is parallel to the 12nf) for guitar specs. I don't hear a lot of difference playing the guitar and toggling this switch, but it affects the bass guitar's frequency response for sure.Codahttps://www.blogger.com/profile/01757608267450267384noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-37340949359705426402014-07-04T07:08:37.261+01:002014-07-04T07:08:37.261+01:00Good point. The filters are changing the tone some...Good point. The filters are changing the tone somewhat, I'll have to do an A/B test to see how exactly. And to be honest, my clone is somewhat noisy, could be all that wiring to the DPDT and extra pot, which are not shielded currently.Codahttps://www.blogger.com/profile/01757608267450267384noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-86820051833318779902014-07-03T21:42:48.997+01:002014-07-03T21:42:48.997+01:00Yes that pretty much mimics what Boss do. I think...Yes that pretty much mimics what Boss do. I think it was a strange choice from them considering the signal will always be going through the pre-emphasis and de-emphasis filters rather than just a buffer, especially considering that it would have been easy for them to take the bypass feed after the input buffer like they do with most of their pedals, but it does make the build that little bit more authentic I suppose. Maybe it's with things like this that Boss got the reputation for their buffered bypass colouring the tone.IvIarkhttps://www.blogger.com/profile/08416945174853142251noreply@blogger.com