tag:blogger.com,1999:blog-6847048658257278783.post229887704882858633..comments2024-03-27T15:26:01.893+00:00Comments on Guitar FX Layouts: Paul Trombetta Designs Bone MachineIvIarkhttp://www.blogger.com/profile/08416945174853142251noreply@blogger.comBlogger21125tag:blogger.com,1999:blog-6847048658257278783.post-48828395222492771232023-01-12T22:11:59.066+00:002023-01-12T22:11:59.066+00:00Finished the 2nd layout and its amazing. Used a ra...Finished the 2nd layout and its amazing. Used a random PNP germ. transistor with an hfe of about 200 and it has a ton of volume and gain. 22n for C2 and 220n for C4 and trumpets are go!!!Ianhttps://www.blogger.com/profile/15254004060035345343noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-50703891265700330032018-10-24T11:29:10.366+01:002018-10-24T11:29:10.366+01:002N2907A or 2N2097A?2N2907A or 2N2097A?Bruno Vianahttps://www.blogger.com/profile/09622976996728052388noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-50769117198938594512017-07-20T14:38:55.120+01:002017-07-20T14:38:55.120+01:00Ok I finished the pedal but as i mention above it ...Ok I finished the pedal but as i mention above it doesn`t play with the AC122.If i put it correctly it justs cuts if i use the Mood or Range switch.If i turn the other way round it doesn`t make a difference.I tried a Silicon PNP MPS2907A and it works great!Maybe it`s the AC122 that does not work.ThanksBoukmanhttps://www.blogger.com/profile/15699313941924133575noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-36199636897838623972017-07-11T15:32:25.013+01:002017-07-11T15:32:25.013+01:00Hi!Just finished the pedal but if i switch sw1 it ...Hi!Just finished the pedal but if i switch sw1 it just cuts the sound.the same happens if i turn the mood pot.it only works with the mood all the way down.If i take the ac122 out it plays ok (no germanium though).Whats wrong?Can anyone help?Boukmanhttps://www.blogger.com/profile/15699313941924133575noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-62828146559529603762017-07-11T14:29:04.034+01:002017-07-11T14:29:04.034+01:00This comment has been removed by the author.Boukmanhttps://www.blogger.com/profile/15699313941924133575noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-65826677409791327882016-11-20T17:00:42.749+00:002016-11-20T17:00:42.749+00:00Are both switches on/off/on?Are both switches on/off/on?Mulekickerhttps://www.blogger.com/profile/02560136987462145600noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-59420626995359211262016-10-30T16:15:39.890+00:002016-10-30T16:15:39.890+00:00Just finished version 2 of this and it is glorious...Just finished version 2 of this and it is glorious. For the germanium side I used an AC122 with hfe between 170-180 from musikding.de. Everything else as suggested in the comments above. The germanium has a little less gain, but I actually prefer that. MortenPhttps://www.blogger.com/profile/07421805058170347967noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-54302786765322026342016-10-26T17:30:31.203+01:002016-10-26T17:30:31.203+01:00woah 1:16 starting those trumpet tones. never hear...woah 1:16 starting those trumpet tones. never heard that kind of tone before!Jesse Jhttps://www.blogger.com/profile/12523457245535210673noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-18629817402065999512016-10-10T16:50:18.512+01:002016-10-10T16:50:18.512+01:00Thanks Alex.Thanks Alex.Chris915https://www.blogger.com/profile/11338308659963510081noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-67851316773349684902016-10-10T11:10:54.175+01:002016-10-10T11:10:54.175+01:00It is.
It's written on the top of the board.It is.<br />It's written on the top of the board.Alexhttps://www.blogger.com/profile/02431893143306628176noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-91907813433160280722016-10-10T10:34:50.545+01:002016-10-10T10:34:50.545+01:00What is Q1? 2n 5088? thanks!What is Q1? 2n 5088? thanks!Chris915https://www.blogger.com/profile/11338308659963510081noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-63865693458807277462016-10-05T01:29:57.097+01:002016-10-05T01:29:57.097+01:00Just built this as well. Used 22nf and 220nf as su...Just built this as well. Used 22nf and 220nf as suggested above. Works well. Anything below 220nf would not produce horn or sub bass sounds. Seems you need lots of low frequencies to pass though there. Highest PNP I had was 160hfe. Worked just fine. Tried another one at 115hfe, out of curiosity. Sounded terrible. Low gain, thin, and way too gated. So I bet that "187" marking on the original was for hfe. Kinskihttps://www.blogger.com/profile/05289368766380894271noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-2347910654731644822016-10-03T14:42:17.664+01:002016-10-03T14:42:17.664+01:00Thanks Paul!Thanks Paul!Alexhttps://www.blogger.com/profile/02431893143306628176noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-52254535212186201522016-10-03T10:17:02.086+01:002016-10-03T10:17:02.086+01:00Verified version 2 last night! Works like a charm,...Verified version 2 last night! Works like a charm, every switch does what it needs to do. Huge range of sounds to be had, from allout fuzz to velcro sounds to ringmod with the bore knob way up. I used a 22n for C2, as that's what is in the WTF at that point and a 220n for C4 cause I likes low-end :). For transistors I used a 2N2907 Si PNP and a MP20B Ge, both sound good to my ears, the MP20 has a little less volume. Maybe I'll play around with the Hfes some more. Thanks to Alex for the layout!! PauLuzzhttps://www.blogger.com/profile/02880567313308419361noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-51470669496092752722016-10-02T17:32:33.499+01:002016-10-02T17:32:33.499+01:00The value of those capacitors are not known. So it...The value of those capacitors are not known. So it would be best to socket different values till you find something you like. Kinskihttps://www.blogger.com/profile/05289368766380894271noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-75668653187870626222016-10-01T16:49:32.065+01:002016-10-01T16:49:32.065+01:00Hi guys, what is meant with the 'test values&#...Hi guys, what is meant with the 'test values'?Dutcheffectshttps://www.blogger.com/profile/05684655737130245984noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-63642240765190696072016-09-27T10:25:04.782+01:002016-09-27T10:25:04.782+01:00Travis is right.
There's some confusion on tha...Travis is right.<br />There's some confusion on that type of transistor.<br />You can try to build the Si/Ge switch layout if you want and test other PNP germanium and silicon transistors.<br />On the gutshot you can read 187 on the top of the 2907.<br />That could possibly be the Hfe.Alexhttps://www.blogger.com/profile/02431893143306628176noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-86645085827055828912016-09-26T19:51:42.879+01:002016-09-26T19:51:42.879+01:00Hmm I just took a closer look at the gutshot and I...Hmm I just took a closer look at the gutshot and I could be wrong about that. Really can't tell. If it's 2N2097A then try some PNP germanium, if it's 2N2907A then it's PNP siliconTravishttps://www.blogger.com/profile/00836791717229314419noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-27135123273719635432016-09-26T19:46:17.379+01:002016-09-26T19:46:17.379+01:00I'm pretty sure that's just a typo in the ...I'm pretty sure that's just a typo in the trace. It would make more sense if it's 2N2907A instead, which is a common PNP silicon transistor Travishttps://www.blogger.com/profile/00836791717229314419noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-8600221774798406172016-09-26T15:43:51.370+01:002016-09-26T15:43:51.370+01:00Anyone know where to get 2n2097a?Anyone know where to get 2n2097a?youngsoundmanhttps://www.blogger.com/profile/03363352338666432803noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-20152848418618248102016-09-26T14:54:33.918+01:002016-09-26T14:54:33.918+01:00Thanks Alex!!Thanks Alex!!Boukmanhttps://www.blogger.com/profile/15699313941924133575noreply@blogger.com