EHX - Deluxe Octave Multiplexer

Discussion regarding early stompbox technology: 1960-1975 Please keep discussion focused and contribute what info you have...
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Bernardduur
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Post by Bernardduur »

Wasn't this model the only full wave octaver (or something like that????)

I know I read an interview with the person who designed it and he was very proud of it.

Also, the bass player of magic dirt uses one for his main fuzz tones and it sounds great :D
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Post by marshmellow »

AG you're right, on the top side they are both 1N3666.

The diode attached on the solder side is barely readable, but I can desolder it if you really need it.

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Post by uncleboko »

Bernardduur wrote:Wasn't this model the only full wave octaver (or something like that????)

I know I read an interview with the person who designed it and he was very proud of it.

Also, the bass player of magic dirt uses one for his main fuzz tones and it sounds great :D
It contains the front end of the rackmount guitar synth does it not? So it has a pretty decent fundamental generator - 2 x CA3094 :cry: so not surprising that it is good!

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noise31
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Post by noise31 »

yeah..i have this pedal,,,,it´s great,,,,,
I take pics and post soon......

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borislavgajic
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Post by borislavgajic »

noise31 wrote:yeah..i have this pedal,,,,it´s great,,,,,
I take pics and post soon......
....wow....great........!!!....could you make trace side pictures like if you put PCB on scanner?...it is a lot easyer to clone pcb in that way :thumbsup

thanks.....I can't wait to see 8)

boris

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Post by himister »

borislavgajic wrote:
noise31 wrote:yeah..i have this pedal,,,,it´s great,,,,,
I take pics and post soon......
....wow....great........!!!....could you make trace side pictures like if you put PCB on scanner?...it is a lot easyer to clone pcb in that way :thumbsup

thanks.....I can't wait to see 8)

boris

Do I "smell" another cloning, drawing, itching plan? Well...Boris? :lol:
You can count on me as usual bro. :thumbsup

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borislavgajic
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Dipthonizer,seekwah,Talkingpedal,morleywha
...soulpreacher,dynacomp,compulator
...buzzaround,fuzzfactory,screwdriver,sho,superdouper,St-9,RogerMayer octavia,Tychobrahe octavia,paralelluniverse,string damper,slowgear
...CE-2,ibanez fL301,EH theCloneTheory
EHX bassmicrosynth,EHX EnglishMuffin,Tube Phaser,springtubereverb ,greyDOD,FulldriveII mosfet,OCD,VOX repeat percussion,RingStinger,Meatball,12stage phaser....
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Post by borislavgajic »

himister wrote:
borislavgajic wrote:
noise31 wrote:yeah..i have this pedal,,,,it´s great,,,,,
I take pics and post soon......
....wow....great........!!!....could you make trace side pictures like if you put PCB on scanner?...it is a lot easyer to clone pcb in that way :thumbsup

thanks.....I can't wait to see 8)

boris

Do I "smell" another cloning, drawing, itching plan? Well...Boris? :lol:
You can count on me as usual bro. :thumbsup

you have my respect Mick.......I wanted to do this one, and atack delay.....thanks

boris

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borislavgajic
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Dipthonizer,seekwah,Talkingpedal,morleywha
...soulpreacher,dynacomp,compulator
...buzzaround,fuzzfactory,screwdriver,sho,superdouper,St-9,RogerMayer octavia,Tychobrahe octavia,paralelluniverse,string damper,slowgear
...CE-2,ibanez fL301,EH theCloneTheory
EHX bassmicrosynth,EHX EnglishMuffin,Tube Phaser,springtubereverb ,greyDOD,FulldriveII mosfet,OCD,VOX repeat percussion,RingStinger,Meatball,12stage phaser....
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Post by borislavgajic »

noise31 wrote:yeah..i have this pedal,,,,it´s great,,,,,
I take pics and post soon......

how soon?

:|

boris

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noise31
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Post by noise31 »

sorry, rigth now take the pics,,,,,,,,
sorrrrrry guys....

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noise31
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Post by noise31 »


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himister
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Post by himister »

Cheers for the photos but these are so small to do any tracing or pcb redraw.
Could you upload originals (BIG ones :lol: ) or reduce size just a little for upload.
Visibility is of utmost importance!!!
One good clean shoot of pcb from the center top of solder side.
If some traces couldn't be seen bellow the pots then shoot sideward to cover those traces also.

Sorry for bothering you noise32 but you will make Boris and me very happy, specially when pcb is done. :D
Thanks in advance. :thumbsup

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noise31
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Post by noise31 »

https://my.imageshack.us/v_images.php


BETTER PICS;;;;REALLY SOON,

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himister
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Post by himister »

Yeah. Thanks noise31...very much!
I don't know if you changed photos on image-shack since my last post but I guess maybe I couldn't see them in full size 'cause I wasn't logged there, if you didn't I apologize :oops: I didn't know for that option till now...my bad sorry.
Anyway pcb photo isn't complete and therefore we couldn't use it for redrawing.

Thanks for the effort. :applause:
Cheers :thumbsup

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noise31
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Post by noise31 »

ok,,,
this pedals sound great......but the FUZZ POWER, is very LOW.......

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borislavgajic
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Completed builds: ...script phase90,ETI phaser,Ross phaser,mutronC200,vox wah,WH10,FW-3,mutronIII,DrQuack,Penfoldautowah,Tubezipper,
Dipthonizer,seekwah,Talkingpedal,morleywha
...soulpreacher,dynacomp,compulator
...buzzaround,fuzzfactory,screwdriver,sho,superdouper,St-9,RogerMayer octavia,Tychobrahe octavia,paralelluniverse,string damper,slowgear
...CE-2,ibanez fL301,EH theCloneTheory
EHX bassmicrosynth,EHX EnglishMuffin,Tube Phaser,springtubereverb ,greyDOD,FulldriveII mosfet,OCD,VOX repeat percussion,RingStinger,Meatball,12stage phaser....
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Post by borislavgajic »

thanks noise31.....very much........but could I ask for two more photos....? please if you can make photo of complete PCB trace side(but not from an angle)....it should be like if you put it on scanner an make copy of it.........also component side(as narrow as possible) ....so we could use it as template in pcb drawing software :D

thanks again,and I hope we can help you with fuzz problem....? :block:


boris

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noise31
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Post by noise31 »

ok,,,,sorry my scanner it´s dead, upload de complet pcb pics..
the fuzz is very low,,,,,i like moore power in the fuzz pot.....

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Post by ckyvick »

im not sure if this helps? its only the two knob version, but would it be possible to figure out the rest from this?
http://topopiccione.atspace.com/PJ19EHO ... lexer.html
i played the two knob in a store and found it to have less than unity output and its tracking was pretty jumpy.

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chicago_mike
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Post by chicago_mike »

Any diy info for the 5 knobber? I never knew this existed till 5 minutes ago. :shock:
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Post by Scruffie »

Redrawn Schematic!

God this one was big, it'd be handy if anyone could cast an eye over it to check for any mistakes I might have made and haven't spotted :hmmm:

Source: - http://sites.google.com/site/electrocon ... actory.jpg
Deluxe Octave Multiplexer.gif
I left off the power supply for now... it's clear enough for anyone wanting to do a repair on the factory schematic and I doubt any DIYer is going to bother finding the correct one if they build this.

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Post by alessandro »

Hi Scruffie,could you please repost the redrawn schematic?When I click on the file the page is empty!Thanks!
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