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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borislavgajic
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Post by borislavgajic »

somebody please post pictures of PCB...?

thank you

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analogguru
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Post by analogguru »

You didn´t do a search on evilbay, did you ?
Here you can buy one actually (current bid $ 28,--):
https://cgi.ebay.com/EH-Deluxe-Octave-M ... dZViewItem

and you won´t believe it, this guy even posted guts, looking like this:
http://i7.ebayimg.com/02/i/001/0a/3b/5cdf_1.JPG
http://i16.ebayimg.com/08/i/001/0a/3b/6016_1.JPG
http://i6.ebayimg.com/02/i/001/0a/3b/5e80_1.JPG

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Bernardduur
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Post by Bernardduur »

Hmmmm, I would love one. Heard the fuzz is awesome on bass!
'No more....... loud music.......'
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borislavgajic
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...soulpreacher,dynacomp,compulator
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...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 »

You are right analogguru ...I did not go there :?
THANK you........... :thumbsup but resolution is not too good :scratch: I guess I'll have to turn my brain ON

thanks

boris

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Bernardduur
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Post by Bernardduur »

borislavgajic wrote:You are right analogguru ...I did not go there :?
THANK you........... :thumbsup but resolution is not too good :scratch: I guess I'll have to turn my brain ON

thanks

boris
I'm bidding on the unit.......... can make some nice pics if I win :D
'No more....... loud music.......'
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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 »

can make some nice pics if I win
Now... I am hopeing you will win :thumbsup :thumbsup

this would be a nice project to do! (like wiggler)

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Post by Bernardduur »

Yeah, I know, but I love weird EHX boxes :)
'No more....... loud music.......'
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Post by Bernardduur »

Bummer, no DOM for me
'No more....... loud music.......'
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Post by Dr. Molly »

Hi

I have one of these but it has realy low output(direct and effect out).Other than that it works fine.Would raising the gain of the input stage cure this or would it just mess up the triggering?

/H

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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 »

This pedal does not work. It powers on, but no sound.
It will most likely need experienced professional attention to ever work properly.
The controls all move well and the footswitch clicks on and off well.
It is missing the bottom panel attachment screws.
One of the wires for the footswitch has come off.
The housing has quite bit of scratching in the paint but is structurally solid and sturdy.
This pedal is for auction as-is for parts or repair.
........168$......not working,but clicking :|

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Post by marshmellow »

My Octave Multiplexer is another pedal than the one in the auction. But I'm too lazy right now to research what kind of models they produced. AG will know anyway :wink:.

The octave (down) effect is rather ridiculous, because not audible at all. Some change in tone is there, but surely no octave(s). I never cared much for that, or the pedal itself, didn't look inside to see if there would be something to do. The fuzz is quite nice and I really like it, but it's nothing special. As is probably the case with most fuzz pedals... Also not really flexible. Unless it's turned up almost full, it sounds really weak and boring. Once a year or so I crank up the pedal and the amp to shock my neighbours on their bloody sundays, it serves at least that purpose quite well.

There are 7 RC4558, one CA3098E, one 4013, one NE5554 and one BC309 hiding under fuzz the pot. Obviously the schematic from that infamous archive that appeared some time ago or the one posted above don't match. If somebody is really interested in tracing, I can provide more infos and pictures.


Pictures: #1, #2, #3


And if anybody wants to see some guts of the EH Hot Tubes Overdrive, I have that lying around somewhere :roll:


Volker

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Post by Dr. Molly »

Hi

I think there may be something wrong with yr Octave Multiplexer. I own the yellow version personally and a friend of mine used to own one like yrs. Both have/had a very nice and loud octave sound. How does it sound with the blend pot all the way to the right? This should be the octave down only.

H

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Post by Dr. Molly »

168$!!!!! What the f**k

You could buy a working pedal for that kind of money.


/H

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Post by Fuzzer »

Yeah, get a POG. If you wanna keep analog, get a Fuckin' pair of chili dogs.
The Freestompboxes Forum search function is soo great, use the search function..., the S E A R C H function.

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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 »

:scratch:

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Post by analogguru »

Fuzzer wrote:Yeah, get a POG. If you wanna keep analog, get a Fuckin' pair of chili dogs.
:hmmm: what do you think about an Arion MOC-1 ? :roll:

Anyway, the Del. Octave Multiplexer from marshmelllow is an intersting unit it was produced at the beginning of 1978 and has similarities to the Microsynth. So it seems to be a Cockerell design. The schematic floating around is from November 1978 and appears to be (re-)designed by Howard Davis. The CA3098 for example has been replaced by a LM 311. I have to dig into this a little bit more.

It appears to me that there could be used the old FET-based Soul-preacher compressor inside, therefore what is written on the Ge-diodes ? 1N 3666 maybe ?

analogguru
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.

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borislavgajic
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Posts: 1542
Joined: 27 Feb 2008, 14:23
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 »

I have to dig into this a little bit more.
I am taking my hat down for you mr AG.......... [smilie=a_okbyenow.gif]


what is ....EH1048?

boris

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Post by analogguru »

EH 1048 = buffered OTA = CA 3094

analogguru
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borislavgajic
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Posts: 1542
Joined: 27 Feb 2008, 14:23
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....
Location: Sombor , Serbia
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Post by borislavgajic »

thanks

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