tag:blogger.com,1999:blog-6847048658257278783.post1654940116942759008..comments2024-03-27T15:26:01.893+00:00Comments on Guitar FX Layouts: AMZ Mini-BoosterIvIarkhttp://www.blogger.com/profile/08416945174853142251noreply@blogger.comBlogger51125tag:blogger.com,1999:blog-6847048658257278783.post-6150914009919221372020-02-17T14:36:27.061+00:002020-02-17T14:36:27.061+00:00There is a 10uF bypass capacitor missing that shou...There is a 10uF bypass capacitor missing that should be in parallel with the 1k source electrode resistor. <br /><br />If it is not included the overall gain is decreased.cctsimhttps://www.blogger.com/profile/02534096833285088736noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-91359029173261446072018-08-11T23:12:16.543+01:002018-08-11T23:12:16.543+01:00My full output is lower than bypass. Also, it work...My full output is lower than bypass. Also, it works with the power off. Have I goofed this build?<br /><br />To got the 3.3uF, I soldered 3 10uF sm caps in a row and then solderd legs onto the ends. Measured on a cap meter at 3.334uF. Cheap too.cringehttps://www.blogger.com/profile/04531687385764665589noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-25001731346851498872017-03-21T23:00:27.261+00:002017-03-21T23:00:27.261+00:00how so i thought the 100uf was for power filtering...how so i thought the 100uf was for power filtering, how could it add gain. i would think it would add a ton of noise but i can't understand how it add's gain if you could explain that would be awesome <br />Anonymoushttps://www.blogger.com/profile/17650462389842308339noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-79365095917053834322017-03-21T22:50:13.792+00:002017-03-21T22:50:13.792+00:00do you still have 202's?do you still have 202's?Anonymoushttps://www.blogger.com/profile/17650462389842308339noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-59385755613357579732016-11-19T22:33:54.925+00:002016-11-19T22:33:54.925+00:00Congratulations! Congratulations! Anonymoushttps://www.blogger.com/profile/07433581678358620839noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-91369745481808738452016-11-19T19:06:08.961+00:002016-11-19T19:06:08.961+00:00Old thread, I'll try anyway
Just finished buil...Old thread, I'll try anyway<br />Just finished building this, sound clear and chimy, but output volume seems too low to be correct<br />Any ideas where I should look?<br />First pedal!Fatalexhttps://www.blogger.com/profile/16012729913743421571noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-15281647968695761472016-08-20T09:28:41.544+01:002016-08-20T09:28:41.544+01:00Jack Orman actually goes into adding a tone contro...Jack Orman actually goes into adding a tone control to his Mini-Booster on his web site.<br /><br />Muzique.com<br /><br />I believe that's it. Look up the Mini-Booster article. He has several schematics in the article, two of which have tone controls. One is the regular hi-cut variety, the other a Big Muff type. It looks quit simple actually. Only a couple of components & pot(s).<br /><br />Hope this helps ....Will Kenworthyhttps://www.blogger.com/profile/16422000200136139825noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-86170673791896013632016-08-20T09:22:38.240+01:002016-08-20T09:22:38.240+01:00This comment has been removed by the author.Will Kenworthyhttps://www.blogger.com/profile/16422000200136139825noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-12939696789751079362016-04-17T12:57:27.642+01:002016-04-17T12:57:27.642+01:00the message I just typed did not show up, I hope t...the message I just typed did not show up, I hope this new one won't duplicate with the previous one.<br /><br />Hi all, mine one has pretty obvious clean sound boost but it generates a lot of constant background noise when used with other distortion pedals. Is it normal?<br />Any advise will be much appreciated, thanks.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-67065328286541085192016-04-05T06:10:00.090+01:002016-04-05T06:10:00.090+01:00You can change the 3u3 cap non polarized with 2u2 ...You can change the 3u3 cap non polarized with 2u2 polarized with (-) leg to the bottom row. No differents on the sound.<br />For more gain take out the 100uf capacitor. bonsaiforum.grhttps://www.blogger.com/profile/09600380611367272261noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-10038209922006345542016-01-30T23:21:05.945+00:002016-01-30T23:21:05.945+00:00Just built this, I can confirm that the 3u3 cap ca...Just built this, I can confirm that the 3u3 cap can be an electrolytic and you put the (-) leg to the bottom row. I tried this with J201's and MPF102's and I think I like the mpf's just a bit more because they sound cleaner, but I put a 201 in the left socket and a mpf in the right and that sounds really good too. Great boost. Can't wait to run it into my '68 Bassman BetterOffShredhttps://www.blogger.com/profile/14915216721556964789noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-56338124994156138572015-03-16T00:16:12.289+00:002015-03-16T00:16:12.289+00:00Does anyone know what components and their values ...Does anyone know what components and their values to change if we want to make this into a Bad Bob boost? I was told that the Bad Bob was based on this just the components were tweaked a bit.Anonymoushttps://www.blogger.com/profile/12289375135507614301noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-20170871408397160382015-02-03T16:17:27.658+00:002015-02-03T16:17:27.658+00:00I did not find the 3.3 u F ceramic cap.
What is t...I did not find the 3.3 u F ceramic cap.<br /><br />What is the best solution to change this 3.3 u F ceramic cap ?<br /><br />Thank youAnonymoushttps://www.blogger.com/profile/09885311400121949922noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-58107398888364483242015-01-13T13:14:42.709+00:002015-01-13T13:14:42.709+00:00Hi, I used this built on to a pot tone control: ht...Hi, I used this built on to a pot tone control: http://www.beavisaudio.com/techpages/BigMuffToneControl/<br /><br />However, everything I do to include it into this mini booster circuit doesn't seem to work properly. Any time I get the tone control working with it, it no longer seems to true bypass - the overall tone is affected. I must be still connecting the tone control's in/out/ground wrongly. Can some one please be kind enough as to tell me EXACTLY what connects where? Sorry, I'm a struggling noob. Anonymoushttps://www.blogger.com/profile/05182822210174344124noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-39983354256426266452014-12-01T20:47:25.910+00:002014-12-01T20:47:25.910+00:00Has anyone seen the Fat and Fatter mod for the AMZ...Has anyone seen the Fat and Fatter mod for the AMZ Mini Booster? I'm a bit of a noob and want to know would it be hard to incorporate it into this build? I mean, it looks like I can just have it off-board between the power and the board, but wouldn't I need any extra resistors to protect the LEDs? I am aware of the general concept, the power going to the board is dropped in voltage by one or two LED's, giving the pedal lower headroom. I just don't understand fully how I'd add it to this build. All help and noob guides for doing this would be highly appreciated. Cheers. http://www.muzique.com/news/mini-booster-fat-and-fatter/Anonymoushttps://www.blogger.com/profile/05182822210174344124noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-75599880346864026102014-12-01T20:46:23.635+00:002014-12-01T20:46:23.635+00:00This comment has been removed by the author.Anonymoushttps://www.blogger.com/profile/05182822210174344124noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-40887673717260620102014-12-01T20:45:38.039+00:002014-12-01T20:45:38.039+00:00This comment has been removed by the author.Anonymoushttps://www.blogger.com/profile/05182822210174344124noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-37627933883573890432014-10-15T23:23:35.306+01:002014-10-15T23:23:35.306+01:00built this, replaced 3.3u with NP 1u and 10pf with...built this, replaced 3.3u with NP 1u and 10pf with 6.8pf. Result is a non fully transparent boost. Treble and definition are definitely reduced and seems like bass is increased. Which of these changes are the culprit, if any? All other values are fine... thanks! TBhttps://www.blogger.com/profile/07681504557428950350noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-21015169509921870372014-09-09T00:03:02.084+01:002014-09-09T00:03:02.084+01:00Sounds like the MOSFet Boost might be more to your...Sounds like the MOSFet Boost might be more to your liking. It's reportedly much more a "clean" boost. I don't see it here but it may be under a variation on the name. Here's the original AMZ page (I hope this is ok to point at)<br />http://www.muzique.com/schem/mosfet.htmStephenFhttps://www.blogger.com/profile/08961661231948433663noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-46168864855098691362014-07-25T18:49:46.758+01:002014-07-25T18:49:46.758+01:00Try something like 10u. The notes say that using ...Try something like 10u. The notes say that using the 2 x 10Ks and the 4M7 "offers the ability to shunt thermal noise from the junction of the two 10K's to ground" which is what that cap will be doing.IvIarkhttps://www.blogger.com/profile/08416945174853142251noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-48164794568850439402014-07-25T18:26:15.849+01:002014-07-25T18:26:15.849+01:00okay, and one more for ya...
The last schematic on...okay, and one more for ya...<br />The last schematic on the geofex page (http://www.geofex.com/Article_Folders/modmuamp/modmuamp.htm) has an unmarked capacitor going from the voltage divider to ground. Any idea what value should be there? It doesn't mention it in the schematic or notes. Drawing up a new schematic to breadboard that basically merges the bottom schematic with the mini-boost schematic. Changes that 3.3uf to .1uf and uses two 10K resistors for the divider fed into a 4.7M resistor to the gate of the bottom transistor (when I refer to top and bottom transistor, I'm referring to them as they appear on the veroboard in the layout above). Anyway, wondering if that capacitor is needed because of the lower resistor values of the voltage divider.Benhttps://www.blogger.com/profile/02644344177589539278noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-88978582292110300662014-07-25T15:22:27.182+01:002014-07-25T15:22:27.182+01:00Okay, so about to unload a slew of questions. Hop...Okay, so about to unload a slew of questions. Hope it doesn't get annoying. <br />Reading on the geofex page (http://www.geofex.com/Article_Folders/modmuamp/modmuamp.htm) about the circuit and wondering what a 10M resistor to bias the first transistor (the one with the input going thru the input cap to the gate) would do. Guess all these questions could be answered by actually doing this, but my day is kinda crazy (stay-at-home dad with a 3 year old and a 1 year old, whose nap times can't be disrupted by me cranking a mini-booster to test my "mods").<br /><br />Also, the geofex article schematic uses 10M resistors for the voltage divider halving the voltage to the gate of the second resistor. Any other affect that would have on the circuit? The 2N5457 transistors seem to be getting harder to source, but I've heard a lot of folks like that in this circuit better than the J201.Benhttps://www.blogger.com/profile/02644344177589539278noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-50527361656585014502014-07-25T14:51:27.117+01:002014-07-25T14:51:27.117+01:00Finally got this built and boxed up with a socket ...Finally got this built and boxed up with a socket for both jfet transistors and the 3.3u cap. I don't have a 3.3u (polarized or non-polarized) so that's why I put a socket there. I've only tried as big as .1u but that seemed to be just fine. I really liked a .022 in there. Seems to be nice and bright for me and sounds good with my setup. My question is, what does that 3.3u cap? Sounds like it really affects the tone and wondering if a tone control there with two caps being swept with a pot would be doable. Also, it isn't very clean and it breaks up pretty much at the lowest setting. <br />Going into a Rivera clean channel and wondering if different transistors would do the trick. I've got J201s in there and a slew of J202s, but I was told they are higher gain. Is there another component, a resistor perhaps, that would affect the breakup? Was really hoping for a clean boost on this, but what I do have is a nice one-knob overdrive for my particular setup. Super loud, though, but useable for the time being for me with a .022u cap in place of the 3.3u. <br />Just curious why such a high value for that cap and if I'm doing something wrong with the .022 in its place.Benhttps://www.blogger.com/profile/02644344177589539278noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-34986478007947236852014-07-10T18:04:34.120+01:002014-07-10T18:04:34.120+01:00That's just a power filter cap, so yes.
+mThat's just a power filter cap, so yes.<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-53227619832604822092014-07-10T15:50:03.911+01:002014-07-10T15:50:03.911+01:00Can I sub a 47uf for the 100uf cap? Can I sub a 47uf for the 100uf cap? Benhttps://www.blogger.com/profile/02644344177589539278noreply@blogger.com