Similar to MXR 45 phaser but the pesky J FETs is replaced by a CD4007 chip so no transistor matching is required.
Schematic avaiable HERE
Similar to MXR 45 phaser but the pesky J FETs is replaced by a CD4007 chip so no transistor matching is required.
Schematic avaiable HERE
Hello fuzzhead .. for weeks now I’m trying to finish the problem from my build of phase 90 ( sabrotone ) .. I’m so tired ,, I see today your schematic and I try it because I need a phase!!!!!!!!
ReplyDeleteYou'd better go for the Faze Filter if you want something close to the phase 90. Phase 45 is a more subtle effect (only 2 phase stages intead of 4)
DeleteOr the Grand Orbiter which sounds great (layout is verified)
DeleteOhhh thank you ,,, today I finish the kps-900 ,,, I send if is verified :D
DeleteThe faze filter is unverified ... but I try that for similar to phase 90
DeleteThe links are 12 not 11on the layout . King regards
ReplyDeleteNice, thank you : i'm a phaser nerd!
ReplyDeleteHello KG .. do you make the phase 90 from sabrotone layout ? Maybe ?
DeleteWhat do you mean : if i have already built it, or if i plan to do it? I didn't built the specific layout you mention, and I don't plan to do so either :)
Deletebecause you say that you are phaser nerd .. I have some problems with this layout ( sabrotone) and I wondered if you had made it.
Delete(By the way, it seems that your picture is slightly cropped at the bottom. Everything is still readable, unless you have some things written below?)
ReplyDeleteSoooo guys just finish the test of this board.. it”s work ... but I have some things to tell .
ReplyDelete1st- the speed knob work on 0 and little 2-3 position , after that position I can’t hear the effect .maybe need another value of pot
2nd - the intensity knob work on 10(full) potition and little back .. maybe need and this another value
3rd - the 3 pin of speed and the 1 pin of intensity still unsolder? Can I solder on ground ?
That’s it ,, it’s work ...
Thanks for giving it a go!
DeleteAccording to the schematic, lug 3 of Speed and lug 1 of Intensity has no connection. Connecting these to ground would proboably mess things up. You could try to add a small jumper between lug 2 and 3 for Speed and 1 and for Intensisty....could make a difference but I doubt it.
Curious which op amp you use? Part number can affect the the behaviour of the LFO. I'll tripple check the LFO section which is located at 5,6 and 7 at IC1.
Also dues the trimmer affect the sound at all?
. Oh yes for the insonlwr pins I see now from schematic . I use LM324 ... I try the smaller link between speed and intensity ..for speed pot I use linear and not antilog. Does make much difference ?
DeleteI connect the pugs but I don’t see any difference ,,, I turn the trimmer now from the other side and work better :) ... and the speed knob is upside down ,, the slowest ion the 10 and the fast is in the 0.
DeleteAfter reading the thread at FSB it appears that a 10uF cap works much better than a 4,7uF cap. The LFO should be much slower with a higher value. Worth trying out?
DeleteWill swap the connections for the Speed control....
mmmm i try to change the 4.7 to 10 uf cap...the full speed its reduced little. sound is better..i start to love it a much
Deletesomthin last .. the r3 i put 15 kohm ..if i put more like 20 kohm or 22 kohm.. what happen?
DeleteI think it will affect overall output volume...if you increase it there will be slifgtly less output.
DeleteI try to put a 47k trimmer instead r3. .
Delete"Will swap the connections for the Speed control...."
DeleteHi,
has the layout been updated yet, or should we swap the connections?
This comment has been removed by the author.
ReplyDeleteHi,
ReplyDeleteI am counting 25 cuts (not 24).
I count 25 cuts too!
DeleteUpdated and yes, I swapped the connections.
Instead of the zener, could I sub a 78l05 4.5v instead?
ReplyDeleteOnly getting a clean signal with the *faintest* phase. I used a 4007UBE, so not sure if it needs the buffered version. Will tinker abs report back.
ReplyDelete