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I recently got a vintage Ace Tone EH-50 analog delay for cheap. It utiizes 6 SAD1024 BBD chips to achieve a 200ms delay time. I'm planning to pull the 6 SAD1024 chips to repair my Morley flanger and MXR 117 flanger and to build some delicious chorus/flanger projects! My question is can I retrofit MN3007 with the SAD1024 just like what they did with the EHX small stone?...so that the Ace Tone EH-50 can function again as intended...with longer delay time I suppose. Asking the madbeaner experts here!!! tia

The Tourbus document is inaccessible at the moment..could anybody pls check..thanks!
(EDIT)...i was able to access and downloaded it from my pc..but it took so long..by the way i can't access it from my iphone.

I'm building a vintage EHX Pulsar...it sounds great but there's a loud tucking coming from the lfo...does the original EHX Pulsar has also loud ticking?...it there anything i can do to remove or at lessen that ticking?...tia

So glad the Charlatan finally released. I checked the docs to see if there's a mod to lessen the noise..especially on the wah mode, but the mods are for distortion issue and ampere consumption. Hey Brian...i'd like to know if your Charlatan build is quiet vs the orig the Worm?...if so, does implementing a different power supply circuit contributes to lessen the noise? On my The Worm unit, i replaced the regulator 15v to 12v...it does lessen a little bit the noise..but i noticed the range control is somewhat affected, at max it seems you turn it back a little. tia

Rocking before boxing the Setback delay...it's working 100%...so clean compared to my DOD fx90...no clock noise/whining on the delay signal...can I still extend the delay time by changing a higher value to R40(2.2M)?
I'm running the Setback at 12vdc with a buck converter. tia

Help!..anybody know the enclosure dimension of a Mutron?
Thanks in advance !

I'm trying to repair an MXR EVH flanger for my son's friend...when powered on, you can hear the LFO sweeping loudly...in bypass mode the sweeping bleeds also. The BBD chip, MN3204 works fine ( i guess ) because as i turn the clock trimmer clockwise all the way, then turn counter clockwise, it is now flanging 100% as it should...no audible changes heard when the bias trimmer is turned in any position.
    But as I reset the power...the flanging was gone, LFO again is heard sweeping loudly again....and when i repeat turning the clock trimmer as describe earlier...flanging now occurs normally.
   As the EVH boards is SMT, there's not much i can replace. I swapped out an MN3207 as it has the same pin config but has a higher delay stages...just to test somehow if the MN3204 is defective in some way. But same scenario happens with the MN3207. ( tho it "flange" in a different way ).
   Any suggestions where should i look. Tnx in advance.

..Hi y'all....i understand that a 9v input on the road rage will render an 18v and -9v outputs. A 12v input will scale to 24v output, but will i get a -12v on pin 5 of the charge pump?

thanks i advance

Hi you all folks...my bass player friend has Behringer BDI2 and asking me he needed more on the presence knob and more lower end on over all tone...please advice which resistors/capacitors should be replaced...i know Behringer BDI21 is a copy of the SANSAMP Bass Driver..so here is the schematic of the latter...thank upu guys in advance...

http://guitar-gear.ru/wp-content/uploads/2016/06/Sans_amp_scheme.jpg

..hi everyone..how did Walrus Audio Julia do the LAG control on this chorus pedal...is this based on a MN3007 bbd chip?...tnx

..hi guys anybody own a pignose PGG-200 travel guitar ?..gutshots and schematic ?
..i have a friend trying to redo the connections..his guitar seem to always in the on mode regardless of the push/pull position.
thank you !

Hi there!..i'm modding a friend's EHX Holy Grail, the clean mode seems easily get distorted, what resistor(s) should i
replace on the "clean circuit"..tnx

"Clean" circuit

..this might interest you guys...
https://l.facebook.com/l.php?u=https%3A%2F%2Fcarvinaudio.com%2Fpages%2Fguitar-amp-schematics&h=ATOreXsTIvnspGhs7gdmNrioIMz3BXXlvSuaiNzQS87oRp3ooGXzLzHOXDHhwHfNUBq1aq4mOZHwoCxMX4Z0aHZTlfjer2LR4AxowTUhFv4&s=1&enc=AZOEXbK64aChX_zHa6obr9yeuS9SOt6JjMwzuU0N-53DHwBf-sWFzHOKySmkWs87V5I3Eonjquls8twD89PTj8t_AU_TCgAnDZGC-fte8Pvwzg

Download all schematics
https://drive.google.com/open?id=0B0ydti16fpTFVzdZaVVGUHU1UHc

..what are your thoughts about this...
https://youtu.be/txuOROqif7Q

http://nwavguy.blogspot.com/2011/08/op-amps-myths-facts.html?m=1

..what does the lag control on the Walrus Audio Julia chirus/vibe does...can i add a similar control on a CE2 chorus?

https://www.walrusaudio.com/products/julia-analog-chorus-vibrato

Tnx

..is there a De Luxe Big Muff project floating around somewhere ?

SD9 docs link not working..tnx

..how would you go about a BOSS DM3 to have a tail mod?..by looking at the schematic my guess is to remove the jfet tansistor connected on pins 10 and 11 of 1571 IC..jumper it then transfer the jfet sw to the input of 1571 IC pin 8...any suggestions from the experts 'round here..tnx in advance..

..just wondering what will happen if i retrofit an MN3006 ic to MN3007 on a flanger circuit...knowing the MN3006 has a shorter delay time..guyatone ps004 utilizes this ic...tnx for your reply..