tag:blogger.com,1999:blog-6847048658257278783.post7339823312139458036..comments2024-03-29T01:36:12.851+00:00Comments on Guitar FX Layouts: Black Arts Toneworks PharaohIvIarkhttp://www.blogger.com/profile/08416945174853142251noreply@blogger.comBlogger130125tag:blogger.com,1999:blog-6847048658257278783.post-16031034573457445952020-03-25T17:41:22.090+00:002020-03-25T17:41:22.090+00:00This comment has been removed by the author.Bungoslyssehttps://www.blogger.com/profile/15318324348110852095noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-1792936547576128392019-05-06T07:52:34.225+01:002019-05-06T07:52:34.225+01:00Have you compared this build to the original? This...Have you compared this build to the original? This one sounds much darker compared to the youtube vids of the original Pharoah. Is that the case?Vhttps://www.blogger.com/profile/18388438506781086291noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-65423070505072949492019-05-05T21:45:11.853+01:002019-05-05T21:45:11.853+01:00The original pedal uses a sp3t switch for the diod...The original pedal uses a sp3t switch for the diodes. They are jumpered in mid position an both caps are in parallel. You could achieve the same with a dpdt on-on-on and a jumper on the switchMr.Baiserhttps://www.blogger.com/profile/11045675646569701854noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-17528319900619984292019-03-03T16:37:22.144+00:002019-03-03T16:37:22.144+00:00Duh... I found the error! It was a missing 2.2k re...Duh... I found the error! It was a missing 2.2k resistor. So much for "triple-checked everything". Now the difference between the diode-settings is really tolerable. Thanks for your replies, Zach!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-24063711139300125332019-03-02T14:17:23.754+00:002019-03-02T14:17:23.754+00:00I can rule out the switch now, even shorting the w...I can rule out the switch now, even shorting the wires that go to and from the switch causes the signal to go very silent. I also replaced the 470nF film cap between "Sw2" and the base of Q3 but it didn't change anything.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-39044227564959166202019-03-01T03:12:40.830+00:002019-03-01T03:12:40.830+00:00Might be or could be a bad switch or the wrong typ...Might be or could be a bad switch or the wrong type of switch. I have an original early model and I can tell you there is a distinct volume drop, as I described above. Zachhttps://www.blogger.com/profile/00044917566185720896noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-14186327680415518682019-02-28T19:07:36.475+00:002019-02-28T19:07:36.475+00:00I've tried that but somewhow all the demos tha...I've tried that but somewhow all the demos that I've watched, make it look like there's hardly any volume drop at all while, on the other hand, I keep seeing comments of people asking if it's normal that there's a significant volume difference between the diode settings. I know that it is to some extent but my specimen seems too extreme. There must be a fault somewhere. Unfortunately I can't find it. <br /><br />Triple checked the board for errors but it looks ok. It's like whenever the signal is routed through the switch (the working middle position/bypass isn't actually going through the switch, as far as I can see), it lacks further amplification. The switch itself is wired correctly and different diodes don't make a difference. I'm starting to wonder if a bad Q3 could be the cause.<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-64883775351200168672019-02-28T16:40:30.265+00:002019-02-28T16:40:30.265+00:00No idea, I’ve never measured that. Did you compare...No idea, I’ve never measured that. Did you compare your build to demo videos online? Might be a good place to start. Zachhttps://www.blogger.com/profile/00044917566185720896noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-87077268336397409222019-02-28T15:02:20.991+00:002019-02-28T15:02:20.991+00:00I do get that the diodes cause some voltage drop b...I do get that the diodes cause some voltage drop but I'm still wondering if the extent of it in my circuit is really normal.<br /><br />When I strum my guitar and measure AC Voltage between the "High"-Pot (lugs 1/2) and GND, I get the following:<br /><br />Bypass: ca. 4.0VAC<br />SI-diodes: ca. 0,5VAC<br />GE-diodes: ca. 0,4VAC<br /><br />Is that much of a deacrease really to be expected?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-66413838449649998922019-02-28T14:23:37.932+00:002019-02-28T14:23:37.932+00:00Clipping diodes will cut the output compared to ha...Clipping diodes will cut the output compared to having no clipping diodes, it has to do with the forward voltage of the diodes. Germanium diodes have a lower forward voltage than Silicon diodes. With this in mind with the switch in the Silcion position you will have some drop in output, but no different than a normal BMP, Germanium will have a lower output than the Silicon position, and with the diodes removes you will have an increase in output. <br /><br />As far as the coupling caps, they are correct for the BATW Pharaoh. The schematic used to create the layout was traced from the actual pedal. Additionally, as you both stated it’s a modified Ramshead BMP. Key word in that statement, it’s MODIFIED, not identical. The increased coupling caps allow more bass to pass through the circuit. Zachhttps://www.blogger.com/profile/00044917566185720896noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-78910262919142863072019-02-28T13:08:27.815+00:002019-02-28T13:08:27.815+00:00I built this and just noticed the 470nF caps inste...I built this and just noticed the 470nF caps instead of the 47nF-ones too. Since it's a rather old and verfied layout, I guess it should be fine. <br /><br />However, I do scratch my head over a problem with the diode selector. I know there has to be some voltage drop when those diodes get switched into the signal path but compared to the bypass-position both options decrease my output volume dramatically (maybe in half) and there doesn't seem to be any mids/lows left. There is a strong increase in fuzz so it can't be all that wrong but it's no use without a proper signal strenght. What could be the problem here?<br /><br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-33895559949807371072019-02-28T09:09:23.530+00:002019-02-28T09:09:23.530+00:00Was just building this and noticed that all coupli...Was just building this and noticed that all coupling caps incl feedback caps are shown as 470nf here. Considering Pharoah was a modded clone of Ram's head, which had one 470nf right after Q1 and all the rest were 47nf's. King Tut from Rullywow shows the same. Does anyone know of a link to gutshots of an actual Pharoah to confirm the value of caps?Vhttps://www.blogger.com/profile/18388438506781086291noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-40988143671168063382018-07-22T08:42:30.705+01:002018-07-22T08:42:30.705+01:00YesYesBetterOffShredhttps://www.blogger.com/profile/14915216721556964789noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-90747756288888651982018-06-27T23:26:25.106+01:002018-06-27T23:26:25.106+01:00am i correct that the first switch is basically a ...am i correct that the first switch is basically a pre gain knob but in a switch form? like in the revelation super bassshvtsvckahttps://www.blogger.com/profile/16339459906807310254noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-18362039259732447402017-07-21T10:15:01.773+01:002017-07-21T10:15:01.773+01:00Built it today and everything works perfectly has ...Built it today and everything works perfectly has volume drop on ge setting but if it's such a issue for anyone you know your amp has a volume knob you turn it clockwise and volume increases. It's such an evil vicious sounding fuzz I think my fuzz quest may be over ........ for now. <br />But all in all used everything in the layout and no problems so it's verified Anonymoushttps://www.blogger.com/profile/04227884943175035448noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-41296808740061204042015-09-25T00:25:59.266+01:002015-09-25T00:25:59.266+01:00Hi there. I finished my "pharaoh" and ev...Hi there. I finished my "pharaoh" and everything works except sustain control. I can not fix it for 3 days. Сhanged the wires, checked board, pot "sustain" changed, but nothing helps, what could be the problem? http://smages.com/index.php?group=yqlvh30x images..Anonymoushttps://www.blogger.com/profile/13274175364593858459noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-983345750304277012015-09-12T00:12:23.061+01:002015-09-12T00:12:23.061+01:00Hello all! Built this and it sounds great. For me,... Hello all! Built this and it sounds great. For me, one of the best si muff type circuits I've built. Tried the g2 but could never get the thing to sound any good:( this has restored my faith in the muff circuits...thnx, all for the help and dedication until we try again:)Blackwinghttps://www.blogger.com/profile/16864575046719143800noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-19143071335782617592015-08-09T20:45:49.747+01:002015-08-09T20:45:49.747+01:00you're going to get a volume drop with the Ge ...you're going to get a volume drop with the Ge diodes due to their lower forward voltage.Zachhttps://www.blogger.com/profile/00044917566185720896noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-5508372060092750112015-08-09T17:51:37.563+01:002015-08-09T17:51:37.563+01:00Cool effect, this has got major balls this one. Us...Cool effect, this has got major balls this one. Used 1N60ps for Ges and the volume drop although still there seems less than with 1N34As.Hozy31https://www.blogger.com/profile/16714771534041521767noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-77677323015232242722015-07-06T18:11:23.401+01:002015-07-06T18:11:23.401+01:00take a look at the notes on the layout. the notes...take a look at the notes on the layout. the notes will tell you what pots you need, what additional connections you will make with them, transistors and/or IC's and diodes you need in each position.<br /><br />anyways, in the notes it says that D1-D4 are 1N914, if you don't have them and can't find them you can sub 1N4148 for them, D5-D7 are Germanium, which you can use pretty much any Germanium diodes you want, each will ad a slightly different flavor of clipping but should all sound fairly similar.Zachhttps://www.blogger.com/profile/00044917566185720896noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-1844515802160590162015-07-06T11:19:29.330+01:002015-07-06T11:19:29.330+01:00Hi Mark,
Can you tell me please which Ge diode can...Hi Mark,<br />Can you tell me please which Ge diode can i use for this "beast"? :) Can i use whatever or is it somehow specificated?<br />thanks,<br />PetrAnonymoushttps://www.blogger.com/profile/00653664038684800712noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-65602628682157156342015-03-10T17:11:01.303+00:002015-03-10T17:11:01.303+00:00I built this and it sounds great but the tone cont...I built this and it sounds great but the tone control doesn't have any noticable effect. Everything else is fine, including the high controlCarpe DMhttps://www.blogger.com/profile/16098942316841023172noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-42460309092970861092015-03-06T16:28:20.231+00:002015-03-06T16:28:20.231+00:00Built this a few weeks ago and it seems to work as...Built this a few weeks ago and it seems to work as it should, but the sustain knob adds a loud hum as I turn it up. Same kind of hum as when the cable from an amp is not connected to an instrument. Guess it has something to do with the grounding but I can't figure it out. Any ideas? Broken pot? IfIOwnedAMidgethttps://www.blogger.com/profile/07225144526399429538noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-62681312729330297772015-01-12T16:30:50.854+00:002015-01-12T16:30:50.854+00:00when i check the signal from input jack onwards I ...when i check the signal from input jack onwards I have signal (peep sound on the multimeter :) till the input of the first 2DPDT. On the output behind the 39k or 390k resistor there is no signal. Is this normal due to the resistors?Anonymoushttps://www.blogger.com/profile/08554209179943476348noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-34878916778729893652015-01-12T09:29:38.612+00:002015-01-12T09:29:38.612+00:00It maybe a stupid question, but how do I follow th...It maybe a stupid question, but how do I follow the signal thru the circuit. As you said Caps block the signal. I can't check the signal Path with the multimeter do I?Anonymoushttps://www.blogger.com/profile/08554209179943476348noreply@blogger.com