tag:blogger.com,1999:blog-6847048658257278783.post4245972073502081891..comments2024-03-19T08:04:50.887+00:00Comments on Guitar FX Layouts: Sola Sound Tone Bender MkIII - 3 knobIvIarkhttp://www.blogger.com/profile/08416945174853142251noreply@blogger.comBlogger48125tag:blogger.com,1999:blog-6847048658257278783.post-18062949849753234302022-01-24T18:34:16.824+00:002022-01-24T18:34:16.824+00:00What is the function of the GE diode in this circu...What is the function of the GE diode in this circuit?Andyhttps://www.blogger.com/profile/18428117698602506968noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-40990810018609331982018-06-08T15:14:48.443+01:002018-06-08T15:14:48.443+01:00Hello everyone. Ask, for the gurus ...
Background:...Hello everyone. Ask, for the gurus ...<br />Background: in the MKII Tonebender is eliminated.<br />If I build this with a voltage inverter, is it convenient or mandatory to remove the 22uf filter capacitor?<br />How will the tone have 2 capacitors, 47uf and 22uf, performing this function?Máximo Asensiohttps://www.blogger.com/profile/14078078987210965275noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-31926850170371910822015-02-16T04:52:50.684+00:002015-02-16T04:52:50.684+00:00hi is tonebender also named fuzz unit?
it seems to...hi is tonebender also named fuzz unit?<br />it seems to have a similar circuit<br />and i am building a fuzz unit with a layout in freestompbox<br /><br />http://www.freestompboxes.org/viewtopic.php?f=19&t=7055<br /><br />buti cant get any sound out of this <br />i have try BC184 and BC549 <br /><br />http://i.imgur.com/w2zfMUCl.jpg<br /><br />but when i use my finger touch the red circle area<br />there are sound with volume and tone knob working but not the gain<br /><br />http://i.imgur.com/twi7bEUl.jpgMax Sthhttps://www.blogger.com/profile/16616916716166496934noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-16137457588296217362014-12-17T19:58:32.797+00:002014-12-17T19:58:32.797+00:00Using this circuit with a 7660scpa chip, can anyon...Using this circuit with a 7660scpa chip, can anyone please confirm what their current draw is? I've measured appx. 30mA even w/out an LED and wondering if this is normal?<br /><br />Also, Collector biasing of Q3 at less than -2V seems low when comparing to other fuzz circuits where it's usually recommended to be at least 1/2 supply voltage or more has been mentioned (between -4.6v to -6v). Anyone experiment with something different than the usual 10k + 18k resistors to put more voltage on Q3's collector? jojokeohttps://www.blogger.com/profile/09041635857670222942noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-38234495412156378422014-11-16T14:40:22.479+00:002014-11-16T14:40:22.479+00:00Haven't tried one since i'm stocked on 766...Haven't tried one since i'm stocked on 7660Ss for the rest of my life, but that could be it. You could try adding a little more filtering to see if it helps.<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-74108872982578442642014-11-16T13:42:55.408+00:002014-11-16T13:42:55.408+00:00Thanks. I'll do some tinkering today. It was a...Thanks. I'll do some tinkering today. It was also my first time using a 555 voltage inverter. That wouldn't be a source of hum would it?march500https://www.blogger.com/profile/14175084388132655491noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-50012207175308727672014-11-16T07:41:16.487+00:002014-11-16T07:41:16.487+00:00I'd suggest doing both. Lower the 220k to 68k ...I'd suggest doing both. Lower the 220k to 68k or 82k and swap the volume pot for 250k lin. That just takes the output closer to tone control and further away from ground without affecting anything in the frequency department. With 68k and 250k pot the resistance between tone control and ground (this being the volume control) stays close enough to the original spec (68k+250k=318k as opposed to 220k+100k=320k).<br /><br />I've built quite a few of these and i even have an original (in form of OEM built as Carlsbro Fuzz). I've never had issues with noise. You should probably try another power supply..<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-44926683018086346752014-11-16T01:55:37.358+00:002014-11-16T01:55:37.358+00:00Pedal sounds great but I'm really craving more...Pedal sounds great but I'm really craving more volume. Is it necessary to sub a 200k pot or just lower the 220k resistor? Will lowering that resistor value affect anything else tone-wise? Anyone else find this thing pretty noisy? It's got the loudest hum on my board right now with single coils-silent with hb's.march500https://www.blogger.com/profile/14175084388132655491noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-43338889577673642992014-10-25T16:38:50.978+01:002014-10-25T16:38:50.978+01:00This comment has been removed by the author.STAALHAARhttps://www.blogger.com/profile/11854706504228574442noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-12696123416297180212013-11-28T12:25:10.542+00:002013-11-28T12:25:10.542+00:00Amazin fuzz - I build one today - Leave out the la...Amazin fuzz - I build one today - Leave out the last resistor 220 K ( or put in on a Switch it makes it louder - Will the gain on the 3. transistor mean anything to how loud it is ( I used 3 Germaniums with around 100 - 110 hfe.. )<br />And the tone control is very good - it can get really brigth and sharp -<br />Once again thanks for sharing -<br />Greetings from Ole - Staalfx - Copenhagen Denmark<br /><br /><br />ReplyDeleteSTAALHAARhttps://www.blogger.com/profile/11854706504228574442noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-44665232506827158102013-11-28T12:23:57.162+00:002013-11-28T12:23:57.162+00:00This comment has been removed by the author.STAALHAARhttps://www.blogger.com/profile/11854706504228574442noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-35920834672864355102013-10-01T23:12:09.428+01:002013-10-01T23:12:09.428+01:00Just Found interesting thread in freestombox site ...Just Found interesting thread in freestombox site . Optimum voltages for basing are q1-3.5 q2-3.5 and q3 1.9 D1 was also an Oc75 used as a diode in the earliest variants of the pedal.will try these changes tomorrow and report back .Anonymoushttps://www.blogger.com/profile/09547422211386179049noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-26977195631385659412013-06-05T16:32:21.189+01:002013-06-05T16:32:21.189+01:00I recall using 200K pot for volume and lowering th...I recall using 200K pot for volume and lowering that resistor to 120K. That way the resistance between tone 3 and ground stays the same.<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-78268440005353907832013-06-05T08:06:26.922+01:002013-06-05T08:06:26.922+01:00Thanks so much. Noted. :)Thanks so much. Noted. :)chumbox https://www.blogger.com/profile/08378022143034035602noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-32852081067701081402013-06-05T07:53:29.315+01:002013-06-05T07:53:29.315+01:00Reverse the diode too. You'd probably want the...Reverse the diode too. You'd probably want the transistors to be in hFE range or 70-120.<br /><br />For more volume, lower the value of 220K at volume 3 to something like 100-120K.<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-20563961526456703802013-06-05T07:31:33.760+01:002013-06-05T07:31:33.760+01:00I'm on a fuzz run... so with this I simply fli...I'm on a fuzz run... so with this I simply flip the elctros and chuck any NPN in there with some leg twisting and I'm done for a negative ground version?chumbox https://www.blogger.com/profile/08378022143034035602noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-65517802919131994712013-04-15T13:11:38.969+01:002013-04-15T13:11:38.969+01:00I'm trying to trouble shoot this pedal today a...I'm trying to trouble shoot this pedal today as I can't seem to get the signal all the way to the output. Q1 is processing signal from the CBE, Q2 from C and B, whereas Q3 only has signal at B...I don't know if that's normal or not but I've tried all combinations on the Qs to make sure nothing else is the matter since I had that issue with a previous build. Signal is going through Fuzz but not making it the volume. I tried metering the trannys but realized I had no idea what I was looking for...Anonymoushttps://www.blogger.com/profile/00451490935341994605noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-21433850648848550502013-04-13T16:44:48.488+01:002013-04-13T16:44:48.488+01:00Sweet! I'll look into it - thanks Vince!
Does...Sweet! I'll look into it - thanks Vince! <br />Does the 1N270 need to be reversed as well?Anonymoushttps://www.blogger.com/profile/00451490935341994605noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-65616373709761789472013-04-13T16:15:34.431+01:002013-04-13T16:15:34.431+01:00Get one of these! Best investment I have made. It ...Get one of these! Best investment I have made. It saves so much time hand testing transistors. <br /><br />http://www.amazon.com/Peak-Electronic-Design-Ltd-dca55/dp/B005NIR8G8Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-21607100216453921162013-04-13T13:22:51.422+01:002013-04-13T13:22:51.422+01:00Cool, gotcha. I just ordered a few NE555 and ICL76...Cool, gotcha. I just ordered a few NE555 and ICL7660S to try the two different voltage inverters on here. <br /><br />So a more general question - how does one determine a good transistor...silicon or germanium? I have a lot of transistors but I don't know how to test them as of yet or what might make one "good" and another "poor." Thoughts or resources that might be useful? Thanks!Anonymoushttps://www.blogger.com/profile/00451490935341994605noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-90456154431382906542013-04-13T07:43:09.362+01:002013-04-13T07:43:09.362+01:00MP38A is a soviet made NPN Ge transistor that has ...MP38A is a soviet made NPN Ge transistor that has reasonable gain range. These are, sadly, rarely for sale on ebay..<br /><br />You can probably get more stable transistors in PNP, so another option would be to use a charge pump to invert the voltage. That way you can have the PNP transistors, but still daisy chain it with other boxes.<br /><br />If you can find good NPNs, then just reversing electrolytics and minding the power would suffice. Ground is still ground, and the board should be fed with +9V instead of -9V<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-87844160339883370242013-04-13T03:07:55.222+01:002013-04-13T03:07:55.222+01:00So I've really been enjoying building fuzz ped...So I've really been enjoying building fuzz pedals...I've had some issues with my first builds from here but that's been me learning the ropes. Made a Zvex SHO today and it turned out great so I'm building my confidence! Miro mentioned having reversed the electrolytics and using MP38As to make it NPN. I don't know what the MP38A is, but is all that really needs to be done to make a PNP circuit negative ground reversing electrolytic polarity? I prefer to power all my pedals from a PP2+ :)Anonymoushttps://www.blogger.com/profile/00451490935341994605noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-82340879604314706912012-10-10T19:33:41.780+01:002012-10-10T19:33:41.780+01:00It did mean the same thing to me.. Until i found m...It did mean the same thing to me.. Until i found myself a new hobby :) I think i'll be trying some next friday though :D<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-75607330413722602442012-10-10T18:35:27.041+01:002012-10-10T18:35:27.041+01:00Ha ha, awesome. Yes a "bender" to me us...Ha ha, awesome. Yes a "bender" to me usually means any weekend. :o)IvIarkhttps://www.blogger.com/profile/08416945174853142251noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-37024711174775417322012-10-10T18:16:29.049+01:002012-10-10T18:16:29.049+01:00http://mirosol.kapsi.fi/varasto/boxes/ryyppyputki....http://mirosol.kapsi.fi/varasto/boxes/ryyppyputki.JPG<br /><br />As "bender" apparently means continuous drinking spree in some slang, i named this "Ryyppyputki" - which is the same thing in finnish. Paint became ugly, but i'm still quite happy with it :) This one's a keeper.<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.com