tag:blogger.com,1999:blog-6847048658257278783.post8688305065563215144..comments2024-03-29T01:36:12.851+00:00Comments on Guitar FX Layouts: MXR Phase 45IvIarkhttp://www.blogger.com/profile/08416945174853142251noreply@blogger.comBlogger116125tag:blogger.com,1999:blog-6847048658257278783.post-42642413048680500282023-01-06T09:39:23.582+00:002023-01-06T09:39:23.582+00:00Hey there, I have this build working, will have a ...Hey there, I have this build working, will have a look at getting some working voltages for you to work from, I suspect it's a biasing issue for either IC1, IC2, or JFETs (or any combo of the three) looking at the near zero voltages in the signal path. <br /><br />I am also working on the Phase 90 with Script Switch but it only works with humbucking hot pickups for some reason possibly gain related but haven't confirmed working 100%. Anyway...<br /><br />Until I can measure (and publish) the Voltages for this layout, I would suggest confirming resistors are in the correct holes from 9V to JFETs (and from JFETs to Ground)<br /><br />Also, unless you are using a 25 turn trimmer, the 'window of phase' is fairly thin for a standard skeleton trimmer, best way is to 'see it' if possible, but oscilloscopes are not the easiest tools to come byPadsterhttps://www.blogger.com/profile/12331513054115959206noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-84676860838704006972022-12-30T17:51:00.910+00:002022-12-30T17:51:00.910+00:00I've built couple of these back in the day. It...I've built couple of these back in the day. It's a tricky build, but it can be done, believe me..<br /><br />And the debug skills you'll learn along the way.. Those will carry you a long way.<br /><br />I'm fairly certain you'll get this board running in the end.<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-49250068966136778422022-12-30T10:43:13.617+00:002022-12-30T10:43:13.617+00:00Sadly the post didn’t help. Going to shelf the pha...Sadly the post didn’t help. Going to shelf the phasers and go back to making fuzz boxes. seagatehttps://www.blogger.com/profile/16686507603198149921noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-4248491965619178122022-12-30T06:51:55.746+00:002022-12-30T06:51:55.746+00:00Will have a look, thank you!
I missed that post wh...Will have a look, thank you!<br />I missed that post when I was searching for answers. seagatehttps://www.blogger.com/profile/16686507603198149921noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-82747600173335669062022-12-30T06:02:51.222+00:002022-12-30T06:02:51.222+00:00Could this thread help you out?
https://www.diysto...Could this thread help you out?<br />https://www.diystompboxes.com/smfforum/index.php?topic=116754.0<br /><br />Lower IC should be IC1 and upper IC2. Those near zero voltages on the other point to a fault/error with power..<br />+mmirosolhttps://www.blogger.com/profile/02400327798106357876noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-42898199035559621922022-12-29T22:23:46.601+00:002022-12-29T22:23:46.601+00:00Checking components again, I noticed the omission ...Checking components again, I noticed the omission of the 20k resistor, left out as I didn't have any on hand, added a 22k in it's place, but no dice, still nothing.seagatehttps://www.blogger.com/profile/16686507603198149921noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-49232788789238339432022-12-29T21:43:27.460+00:002022-12-29T21:43:27.460+00:00If someone has has the schematics for either or bo...If someone has has the schematics for either or both circuits that would be great too... :)seagatehttps://www.blogger.com/profile/16686507603198149921noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-49208167862547281452022-12-29T06:30:44.369+00:002022-12-29T06:30:44.369+00:00Hey all,
I'm at a loss! I first built the Phas...Hey all,<br />I'm at a loss! I first built the Phase 90 w Script Switch Rev3 and now the Phase 45 Rev 2 and neither of them are working. <br />double checked all links, cuts and solder points, checked for continuity. <br /><br />Replaced the ICs to no avail, the JFETs are matched using the JFET matcher on this site.<br />D1 is a 1N4733 instead of the 1N5230.<br /><br />I get no signal coming out, not much point using my audio probe as I can't work out the signal flow (am a newbie) and I can't find a schematic.<br /><br /><br />Voltages as follows:<br /><br />https://www.msc.id.au/tmp/phase45top.jpg<br />https://www.msc.id.au/tmp/phase45bottom.jpg<br /><br /><br />IC1<br /><br />1 0.480<br />2 0.910<br />3 0.955<br />4 0<br />5 0.830<br />6 0.544<br />7 0.609<br />8 9.45<br /><br />IC2<br /><br />1 1.34<br />2 1.339<br />3 0.955<br />4 0<br />5 3.6 - 6.06 Oscillating<br />6 0 - 6.03 Oscillating<br />7 0 - 8.8 Oscillating<br />8 9.45<br /><br />Q1<br />D 0.955<br />S 0.955<br />G 1.223 - 1.314 Oscillating<br /><br />Q2<br />D 0.830<br />S 0.954<br />G 1.272 - 1.376 Oscillating<br /><br />Not sure where to go from here...<br /><br />Help would be appreciatedseagatehttps://www.blogger.com/profile/16686507603198149921noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-72079585570559401542022-03-11T02:02:00.133+00:002022-03-11T02:02:00.133+00:00did you get this one to work?
did you get this one to work? <br />Bradchophttps://www.blogger.com/profile/04914483561917483473noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-88909671830631947052022-03-11T02:00:40.834+00:002022-03-11T02:00:40.834+00:00can't get phase! Same as others, slight volume...can't get phase! Same as others, slight volume drop when turned on, no phasing, no change with speed knob, and bias trimmer has no effect. I have nicely matched 2n5952 and the correct diodes. Just noticed if speed pot is at max there is a quiet tick tick tick. NOt sure where to go from here.Bradchophttps://www.blogger.com/profile/04914483561917483473noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-20693044093632077262021-11-18T10:44:02.246+00:002021-11-18T10:44:02.246+00:00This one next on my build list thus week!
I had a...This one next on my build list thus week! <br />I had already dod phasor 201 and this one is very similar to 201.so i guess it works fine with 2n5485 transJun dhttps://www.blogger.com/profile/07905810487041216546noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-91902488960571200672021-03-11T18:42:54.095+00:002021-03-11T18:42:54.095+00:00200k worked for me, but I found cheap 250k online ...200k worked for me, but I found cheap 250k online after for making the phase 90. 500k may work but may be difficult to get close enough to the resistance you need for phasing depending on the trimmer.Padsterhttps://www.blogger.com/profile/12331513054115959206noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-22543860575103142202020-12-06T03:38:20.415+00:002020-12-06T03:38:20.415+00:00How important is the value of the trimmer? I don&#...How important is the value of the trimmer? I don't have any 250k around, but I have a couple of 200k and 500k. I assume either of them will do?Fredrik Fenckehttps://www.blogger.com/profile/14795658205902585587noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-47576834073182234362020-08-19T20:59:36.035+01:002020-08-19T20:59:36.035+01:00thanks so much sorted it i had 2n5458's in my ...thanks so much sorted it i had 2n5458's in my kit they are the same orientation as the 2n54657's sorted my problem danny1mhttps://www.blogger.com/profile/07283106823520529146noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-34576110081806075362020-08-19T09:52:23.752+01:002020-08-19T09:52:23.752+01:00Thanks I'll double check everythingThanks I'll double check everything<br />danny1mhttps://www.blogger.com/profile/07283106823520529146noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-58125968001965439832020-08-18T22:39:15.069+01:002020-08-18T22:39:15.069+01:00Make sure the JFETs are installed correctly. For e...Make sure the JFETs are installed correctly. For example, this layout is designed for 2N5952 but the matched set I bought were 2N5457. I had to turn them around 180 degrees to match the pin connections of the layout. You can find data sheets for your JFETs online to verify the pin names. Set the bias with the speed knob set half way. If the speed is too slow you might not hear the phasing. The trim adjustment has a very narrow range where the phasing happens. EddieBhttps://www.blogger.com/profile/09002921700371401999noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-83134268433828756162020-08-18T10:55:32.031+01:002020-08-18T10:55:32.031+01:00Mr_de_fursac25 April 2016 at 20:05
Hi
I have the s...Mr_de_fursac25 April 2016 at 20:05<br />Hi<br />I have the same issue as above: pedal seems to work but no phase.<br />When i push the switch, i just have a slight volume drop<br />I have tried to turn the bias pot while my looper was playing but no sound change at all<br />These are the measurments i have made:<br /><br />Top TL072CN<br />4v =|-----|= 9.33<br />4v =|-----|= 4<br />4v =|-----|= 4<br />0v =|-----|= 4<br /><br />Down TL072CN<br />4v =|-----|= 9.33<br />4v =|-----|= moving between 2v and 7v<br />4v =|-----|= moving between 4v and 6v<br />0v =|-----|= moving between 4v and 6v<br /><br />Both JFETS have 4v to their 3 legs.<br /><br />Do you have any advise ?<br />Thank you<br /><br />have this same problem anyone know what it could be?<br />do the transistors come matched in the bitsbox kits? wondering if it's that?danny1mhttps://www.blogger.com/profile/07283106823520529146noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-24241608354021647852020-08-18T10:49:45.748+01:002020-08-18T10:49:45.748+01:00hi have this same problem anyone know what the fix...hi have this same problem anyone know what the fix is??? bias trim does nothing this is my third bitsbox kit that hasn't worked do the send out a matched set of transistors? any help welcome at my wits end here can't seem to get anything to work ive got 2 out of five kits working so far and one of them has an issue with gain pot all kits pretty disappointed with it so far.danny1mhttps://www.blogger.com/profile/07283106823520529146noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-37294425758829753322019-06-13T12:02:47.460+01:002019-06-13T12:02:47.460+01:00Hi, i have 5,1V zener diodes... But i have one 0,5...Hi, i have 5,1V zener diodes... But i have one 0,5 watt and other of 5 watts. Wich i can use?<br /><br />Thanks!Chestertonhttps://www.blogger.com/profile/06398639041943318723noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-58390842348256343642019-01-11T14:54:51.324+00:002019-01-11T14:54:51.324+00:00Post all the IC voltages you're getting on the...Post all the IC voltages you're getting on the Klon on the Klon thread and I'm sure we'll be able to guide you.IvIarkhttps://www.blogger.com/profile/08416945174853142251noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-65224042073302632772019-01-05T21:11:53.990+00:002019-01-05T21:11:53.990+00:00Great project - this is my first successful Bitsbo...Great project - this is my first successful Bitsbox project (I'm trying to debug my Centaur that won't work) and I'm sure after a few minor tweaks it will get a lot of use. <br /><br />My only gripe is the lack of depth control but the Phase 45 is very basic, I might try something a little more complex down the track. Next for me is the Heartthrob Tremolo, after I build my Kurt Ballou Brutalist JnrAnonymoushttps://www.blogger.com/profile/17735522889033621685noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-70704676245342884372019-01-05T05:02:04.123+00:002019-01-05T05:02:04.123+00:00This comment has been removed by the author.Anonymoushttps://www.blogger.com/profile/17735522889033621685noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-65008607866891670292018-05-01T14:55:01.819+01:002018-05-01T14:55:01.819+01:00If you're a newbie this project is surely not ...If you're a newbie this project is surely not the first you could do. The blue dot show a link beetween 2 bridges, see it like there are 2 links with a common holeFrogThttps://www.blogger.com/profile/13601741579242517635noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-58403763683758085232018-04-30T06:56:15.292+01:002018-04-30T06:56:15.292+01:00Hi
Im a newbie here and am looking to build this....Hi <br />Im a newbie here and am looking to build this. Can soneone explain to me what the blue dots are ?<br />They are described as double links in single holes. Jakeollyhttps://www.blogger.com/profile/06594130658734032184noreply@blogger.comtag:blogger.com,1999:blog-6847048658257278783.post-27886749574944117852017-08-25T03:18:16.922+01:002017-08-25T03:18:16.922+01:00Hi, did you happen to find a fix for the fuzz soun...Hi, did you happen to find a fix for the fuzz sound? the pedal is crazy loud and all fuzz, i can sometimes hear the lfo going underneath the fuzz when i turn the trim potAnonymoushttps://www.blogger.com/profile/05540272700453382737noreply@blogger.com