tag:blogger.com,1999:blog-6847048658257278783.post2338885322030158933..comments2024-03-29T01:36:12.851+00:00Comments on Guitar FX Layouts: Cook Spring ReverbIvIarkhttp://www.blogger.com/profile/08416945174853142251noreply@blogger.comBlogger66125tag:blogger.com,1999:blog-6847048658257278783.post-50129650033440915292021-01-08T17:32:01.374+00:002021-01-08T17:32:01.374+00:00Hi Tsvestan, thanks a lot for your feedback. i'...Hi Tsvestan, thanks a lot for your feedback. i'll try your modification soon. but i have a question for you. i got a Belton BL3AB31B tank which has only 10ohm input impedance (and 2575ohm output). what must i do for matching the impedance?LaSuzehttps://www.blogger.com/profile/00494797788615537833noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-55656914677082452582019-06-11T15:39:24.814+01:002019-06-11T15:39:24.814+01:00Just for those who were struggling with the loss o...Just for those who were struggling with the loss of low end:<br />the decoupling caps serve as high pass filters. increasing their value (I used 0.47uF) will give back the low end BUT seems to also give some rumbling in the sound, probably from leakage after a note is played. Its a tradeoff. I advise to only do the Input and Dry 3 caps (the ones that are back to back) in the "dry" part of the schematic.Mathijshttps://www.blogger.com/profile/03802504190134797297noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-22954327700343749822019-02-06T02:30:44.373+00:002019-02-06T02:30:44.373+00:00what is the input impedance and output impedance a...what is the input impedance and output impedance actually at? wonder if I can get this to work with the new blue accutronics tanks without a transformerElf Hands Customshttps://www.blogger.com/profile/13205978341945573664noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-23930839190227012692019-01-02T20:05:27.935+00:002019-01-02T20:05:27.935+00:00Hi,
I know this layout is quite old so there'...Hi,<br /><br />I know this layout is quite old so there's a chance noone will reply, but i've tried building this and i'm not having any luck.<br /><br />The clean signal passes through fine but I'm not getting any voltages on the IC chip and not getting any reverb.<br /><br />I've switched out the IC for another LM386 and for a JRC4558 just to see if it was a faulty chip and there's still no voltage - I'm not sure what the issue could be as the power is jumpered to pin 6 and I'm getting power at the 9v input.<br /><br />I took some readings of the transistor voltages to compare with others who had posted and they seem off :<br /><br />Q1 - bottom, Q2 - middle and Q3 - top<br /><br />Battery 8.2v<br /><br />q1<br /><br />c - 6.58<br />b - 0.71<br />e - 0.12<br /><br />q2<br /><br />c - 2.67<br />b - 0.86<br />e - 0.24<br /><br />q3<br /><br />c- 5.27<br />b - 0.86<br />e - 0.26Zachttps://www.blogger.com/profile/16892768849991843577noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-23961168381924111852018-02-24T17:33:43.029+00:002018-02-24T17:33:43.029+00:00Also I did some more cuts, and added additional ju...Also I did some more cuts, and added additional jumper to link the 'new' input stage with the stage before the 386 chip, and changed the gain of the 386 chip by removing the capacitor and resistor in the gain loop to reduce the overdrive in the drive stageTsvetan Popovhttps://www.blogger.com/profile/18411731309559794525noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-60046227182186496252018-02-24T17:26:46.390+00:002018-02-24T17:26:46.390+00:00Sorry for the incognito post, couldn't sign in...Sorry for the incognito post, couldn't sign in for some reason, my name is Tsvetan Popov from Bulgaria.Tsvetan Popovhttps://www.blogger.com/profile/18411731309559794525noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-76534148456806978742018-02-24T17:22:08.894+00:002018-02-24T17:22:08.894+00:00I got this running fine with a 4fb reverb tank (12...I got this running fine with a 4fb reverb tank (1200 ohm input impedance, 2200 ohm output impedance). I put a small 220 to 6v transformer from an old power supply, wired secondary to the tank out, and primary to the tank input to match the impedance, it works like a charm. Also I switched wet and dry stages by wiring the input jack to the 'from tank' and the output of the reverb tank to the input, I found it works much better this way (the wet and dry controls are the other way around). The reverb sounds much Fuller and the dry sugnal is smoothly controlled. I used 2N5088 transistors. Thank you for this build, it sounds great as a spring reverb should, surfy and drippy at high settings, musical and responsive.Tsvetan Popovhttps://www.blogger.com/profile/18411731309559794525noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-46990343298134090442017-04-26T13:35:57.086+01:002017-04-26T13:35:57.086+01:00hey Joshua, what did you do to make it sound great...hey Joshua, what did you do to make it sound great?Anonymoushttps://www.blogger.com/profile/12984629731192686109noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-28257854933652676342017-03-21T19:20:13.268+00:002017-03-21T19:20:13.268+00:00Does anyone know of an easy single knob reverb bui...Does anyone know of an easy single knob reverb build? Something for a novice? Thanks in advance.. Anonymoushttps://www.blogger.com/profile/05880655627350080447noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-82630241297636540192016-12-06T15:01:31.489+00:002016-12-06T15:01:31.489+00:00I'm gonna try this. but to let you know i buil...I'm gonna try this. but to let you know i build reverbs that are used with 4ab tanks(8ohm) input, and if i use a 190ohm input tank, se signal is much lower. I'd try lower impedance input tanks for this. generally the conventional guitar tank has a 8 ohm input, and usually, lm386 are used to drive little speakers BaddRiddimhttps://www.blogger.com/profile/07843847228655209381noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-70183624098605496012014-11-20T12:34:49.241+00:002014-11-20T12:34:49.241+00:00That is what I thought. I built this with modkit 4...That is what I thought. I built this with modkit 4EB3C1B tank. Everything works but it cut all my volumes in half on my amp and pedal. If I try to to my pedals up it starts to make a groaning sound.I wanted to try to build this reverb http://www.tangible-technology.com/schematics/fender/hrd/hrd-3.htm but don't fully understand how to read schematic. If anybody could vero this for me it would be great. jhttps://www.blogger.com/profile/10651408041883530192noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-12259952401108899542014-11-20T09:37:08.289+00:002014-11-20T09:37:08.289+00:00I'd always put reverb lastI'd always put reverb lastIvIarkhttps://www.blogger.com/profile/08416945174853142251noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-33305779332341902392014-11-20T03:44:08.428+00:002014-11-20T03:44:08.428+00:00Would I add this to the end of my guitar effect ch...Would I add this to the end of my guitar effect chain or beginning? I don't have fx loopjhttps://www.blogger.com/profile/10651408041883530192noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-74692464590881517202014-09-02T15:37:45.564+01:002014-09-02T15:37:45.564+01:00I've built this one for my tank from an old Tr...I've built this one for my tank from an old Trace Elliot guitar combo. It is an S3EA1C1B with 3 springs, 800 ohms input and 600 ohms output impedance. While the output is fairly matched, the input isn't at all. Touching the springs gives that roaring thunder i've expected from a spring reverb. Driving it with a guitar signal just puts out a dull sounding reverb, no mids or highs at all. How can i mod the build to get some springy highs into it?? Greetings, ThomasAnonymoushttps://www.blogger.com/profile/02411052421801075933noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-7380855195047585542014-05-30T20:56:14.978+01:002014-05-30T20:56:14.978+01:00This comment has been removed by the author.Anonymoushttps://www.blogger.com/profile/09428900550450343893noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-72511851279303797822014-05-30T20:55:24.904+01:002014-05-30T20:55:24.904+01:00Is the component marked as LED in the layout actua...Is the component marked as LED in the layout actually the resistor in series with the led? In that case is there any reason why it must be there instead of as part of the offboard wiring? Because this is unusual compared to all the layouts I have used from this site Anonymoushttps://www.blogger.com/profile/09428900550450343893noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-28272174145310592272014-04-24T01:59:28.335+01:002014-04-24T01:59:28.335+01:00Awesome! Would love to know what changes you did. ...Awesome! Would love to know what changes you did. <br />How is the dry signal compared? Do you find the circuit changes the dry tone in any way?Kinskihttps://www.blogger.com/profile/05289368766380894271noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-51056627911038646462014-04-23T15:59:23.904+01:002014-04-23T15:59:23.904+01:00FYI, I got this sounding great. I will let you kno...FYI, I got this sounding great. I will let you know what all I changed, but here it is.<br /><br />https://drive.google.com/file/d/0ByAgtcHCrdNNaExDTnZtY2tEOUE/edit?usp=sharingAnonymoushttps://www.blogger.com/profile/15583242086066569257noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-91683166643045834722014-04-23T15:51:17.912+01:002014-04-23T15:51:17.912+01:00there is usually a metal washer with a tab on it f...there is usually a metal washer with a tab on it for the ground to be connected to.Anonymoushttps://www.blogger.com/profile/15583242086066569257noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-19070084522887478312014-04-23T15:36:24.847+01:002014-04-23T15:36:24.847+01:00i´m quite new to this, what do you mean by RCA sle...i´m quite new to this, what do you mean by RCA sleeves to ground?Alcatéiahttps://www.blogger.com/profile/03092198772785438460noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-66676699154226890092014-04-08T20:36:56.532+01:002014-04-08T20:36:56.532+01:00This comment has been removed by the author.Anonymoushttps://www.blogger.com/profile/15583242086066569257noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-36939464134769695392014-04-08T20:32:54.746+01:002014-04-08T20:32:54.746+01:00cool, I was running at 12v and it sounded good. I ...cool, I was running at 12v and it sounded good. I did try 18v, no issues but no change either. I'm using the MOD 8EB2C1B tank (I chose this one because it's used with the VanAmps Sole Mate Jr), purchased from amplifiedparts.com. My only problem is trying to fix the low end loss. Even with the dry knob at unity, the bass is almost completely removed. It ends up sounding like a treble booster. Got any ideas?Anonymoushttps://www.blogger.com/profile/15583242086066569257noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-4998666432762223692014-04-04T19:12:11.543+01:002014-04-04T19:12:11.543+01:00LM386 can't handle 18V. It has maximum rated v...LM386 can't handle 18V. It has maximum rated voltage of 12V.<br /><br />What tank did you use?<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-34149991737452336242014-04-04T16:05:31.713+01:002014-04-04T16:05:31.713+01:00So I built this for a friend and it works, and lik...So I built this for a friend and it works, and like others have said not a ton of reverb on tap. Mine is a little dark. Anyone tried running this with 18v?Anonymoushttps://www.blogger.com/profile/15583242086066569257noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-34599418745218094242014-02-15T23:07:34.582+00:002014-02-15T23:07:34.582+00:00So i put a compact LPB-1 after the output and it m...So i put a compact LPB-1 after the output and it made the difference, however it isn't a pristine clean sound and it takes a bit of the low end off the sound of the clean signal. I'd like to see a bit more headroom in there. I am thinking about making a SHO and testing it in it's place. It does sound pretty good however, and there could be some uses for it in the studio.<br /><br />One drawback is I am guessing a by product of the LPB circuit, it has a dramatic volume drop when I roll off my guitar's volume which means I need to essentially keep it dimed or close to, which isn't ideal.jon qhttps://www.blogger.com/profile/11167002970551645140noreply@blogger.com