"Sonic Death Ray" Phaser - a phase insurrection!

[GodSaveMetal]

Parity modulation LFO redesigned, perf'ed and tested, home-made vactrols rolled. And the main PCB arrived today from my PCB man.....



......and some perf-porn for Slade:

There is no reference to your PCB or LAYOUT please post here the PCB and the layout!!!!!!!!!
Thank a lot!!!!!! it´s the real pedal I see!!!!

[GodSaveMetal]

Parity modulation LFO redesigned, perf'ed and tested, home-made vactrols rolled. And the main PCB arrived today from my PCB man.....



......and some perf-porn for Slade:

I don´t see any PCB !!!! please post here yor PCB and layout!!!! thanks!!!!!! It´s a real unique pedal!!!!!

[tuckster]

Save your !!!!!!!!!!!!!!!!!!!!!!!!!!! and search the thread!!!!!!! page 3   You know how to use a internet forum?!?!?

[GodSaveMetal]

thanks tuckster you save my live!!!! cause I'm getting crazy!!!!!! I was redirecting directly for this page!!!!! thanks a lot!!!!

[tuckster]

http://catb.org/esr/faqs/smart-questions.html
http://en.wikipedia.org/wiki/Netiquette

Is it so hard two click the Button? You posted so many times.. If you had just clicked through the pages you woudn't have had to wait (I hope that was written the right way.. I hate english )

[frequencycentral]

......and one question it will be funcional to chanche the FET´s with the 1N5457 or 5458 one´s? thanks for your attention I´m from PERÚ !!!!

I don't know. I did try some of those FETs without much luck early on during development, but their Vgs was way off with respect to the 2N5485's I used. The FETs, and their (matched) Vgs are everything in this circuit. To get it working with different FETs/Vgs you may have to tinker with the LFO's feedback resistors and voltage divider. Good luck with your build, if you dare. I looking forward to the debug thread with anticipation. This is not your average phaser build.  

[Dr.maligno]

woow!! frecuency, i´m amazed about this phaser machine! coungratulations!
A little question. How could i match the fet´s?
And, where did you buy the plastic cover for the pot´s?
thanks

[frequencycentral]

woow!! frecuency, i´m amazed about this phaser machine! coungratulations!
A little question. How could i match the fet´s?

Thanks!

GEOFEX FET matcher: http://www.geofex.com/Article_Folders/fetmatch/fetmatch.gif

And, where did you buy the plastic cover for the pot´s?

What the clear plastic covers on the backs of the pots? They come as standard on Tayda's Alpha pots: http://www.taydaelectronics.com/servlet/the-Potentiometers--fdsh--Variable-Resistors-cln-Rotary-Potentiometer/Categories

[GodSaveMetal]

how I connect the LED monitor of the PARITY and PHASE speed? you made a footswitch for the auto/manual modulation!!!! what a great idea please how I made the conenections of  all the LEDs monitors?

[frequencycentral]

how I connect the LED monitor of the PARITY and PHASE speed? you made a footswitch for the auto/manual modulation!!!! what a great idea please how I made the conenections of  all the LEDs monitors?

I basically used this wiring diagram: http://www.diystompboxes.com/smfforum/index.php?topic=84968.msg723519#msg723519  But I used a DPDT instead of an SPDT, and a 3PDT stompswicth instead of a DPDT, and used the extra poles to connect the status LEDs. The two LFO rate LEDs are tapped off the outputs of the LFO opamps.

[GodSaveMetal]

Draw the conection of the The two LFO rate LEDs that are tapped off the outputs of the LFO opamps!!!! please!!!!

[Slade]

^^^
I highly recommend you to not make this pedal until you have more building skills, at least for making your own layouts. I mean it, it's a really hard circuit, and more if you don't have enough knowledgement. I'd suggest that you buy one from Rick, but I think h won't be building it for a time.

[frequencycentral]

^^^
I highly recommend you to not make this pedal until you have more building skills, at least for making your own layouts. I mean it, it's a really hard circuit, and more if you don't have enough knowledgement. I'd suggest that you buy one from Rick, but I think h won't be building it for a time.

+1

With the greatest of respect to GodSaveMetal, if you are asking for a wiring diagram for how to wire an LED to the output of an opamp, you will have a very very hard time successfully building this pedal. I have built dozens of pedals and amps, but this one tough for me. Populating the PCBs was easy, but it took me a whole day to do the off-board wiring. I'm not holding anything back, everything you need to know to build this pedal is already here in the thread, but I'm assuming a certain level of knowledge is already there on the part of the prospective builder. I certainly don't have the time or inclination to write a step-by-step tutorial. I really hope this doesn't come across as condescending, but I think your attempt to build this pedal would cause you (and therefore me) a great deal of heartache, and is very likely to result in a non-functional pedal.

[GodSaveMetal]

My intention is only didactical because I´m teacher of science and want to teach to my students how far can they will go with guitar effects; but thanks a lot for your help

[Valoosj]

PCB layout verified! Just hooked it up! This thing sounds awesome - even quieter than on breadboard. I can't wait to get it boxed up now......

Bumping this cause I just saw it on your site. Is there any reason for the horrible layout? It's zay bigger than it has to be, even for putting LFO and audio on one board. No wonder you weren't eager to do another.

[frequencycentral]

Is there any reason for the horrible layout? It's zay bigger than it has to be, even for putting LFO and audio on one board. No wonder you weren't eager to do another.

Oh! I thought I'd done pretty good! 

The main board, which is an entire 14 stage phaser including the LFO is 28 x 30. Compare this to Tonepad's Phase 90 which is 20 x 21 for only 4 stages. Which means the SDR is exactly twice as big as the P90, but adds 10 more stages. The practicality is that each phase stage needs to see vref and LFO, as well as each opamp package needing to see ground and +ve, and the audio path blah blah blah.

The second parity modulation board was an afterthought, after I'd had the main board etched. It houses the second LFO and optos. I've now redesigned this board to be pot mounted, which cuts down a lot of off-board; it now also mounts the bulk of the LEDs as well as a lot of the switch routing stuff.

The main challenge of the prototype was basically the small enclosure size. I've opted for a bigger enclosure for the production run - that, coupled with the new parity board, makes for an easier build than the prototype ever was.

BTW, some of the production run are going into Prymaxe in NJ, which I'm pretty stoked about!

......so, if anyone's designed a smaller, better laid out 14 stage phaser with parity modulation and multiple regen taps.......

[Valoosj]

I'am in no way capable of designing such a marvellous pedal. What I could do to offer you some help with, is with any layouts for future projects.
You know I like keeping things (certain things only ) small 

[mr_deadmaxxx]

can you get the sound of all "other" phasers (mxr, boss, etc) on this pedal?

[mr_deadmaxxx]

i wanted to make this but it would seem that some of the images necessary to create this has been deleted by photobucket.e.g..the layouts and all.

it would be nice if frequency central could reload those images...thanks..

[Mark Hammer]

A buddy came over with a Maxon Rotary Phaser on the weekend, and let me pop the hood.  It can provide up to 10 stages of phase shift, but only 6 are swept, and the remaining 4 are fixed, identical to the MXR Phase 100.