Revised Electro Harmonix Clone Theory layout.

[nelson]

I took the time over the past couple of days to redo my Clone Theory layout.

It incorporates the MAX1044 charge pump. Can be powered from batt.

Layout is ALOT smaller and only involves 1 jumper.

http://homepage.ntlworld.com/paul.nelson666/Clone%20Theory%20new.pdf


Layout is unverified.

Any mistakes, suggestions etc?

[nelson]

32 views not one comment....

[StephenGiles]

I know the feeling! Looks very good indeed. Out of interest what do you use to draw your circuit diagrams?
Stephen

[nelson]

Microsoft Visio.


I beat microsoft too. 

[Steve Newton]

Wow, compact layout!

Is there an error in the schem? The ground tag for the input comes from the wrong side of R1 on there (correct on the layout though.)

[nelson]

The original Pedal had a Direct out. Its not a ground symbol on the schem, its the direct out. You will see the extra pad next to the input pad for this.

Is that what you mean?

Thanks for your compliments

[Steve Newton]

The original Pedal had a Direct out. Its not a ground symbol on the schem, its the direct out. You will see the extra pad next to the input pad for this.

Is that what you mean?

Thanks for your compliments

Yeah I can see now. There's a GND pad by the IN pad on the board and I thought it was the arrow comming off the top of R1 on the schem. But the direct out makes sense.

[nelson]

Just going for mods, one more knob can be added if you replace R37 with a pot wired as a variable resistor,  a Pitch shift knob. A 100ohm resistor connected to an LED coming off Pin one of 1458 in LFO for blinking LED.

[audioguy]

Does this one make much noise? All the reviews of the original say it was noisy, but that the noise wasnt so bad you couldnt use it.
I just finished a Small Clone, which I freakin love... now I would like to keep expanding my tonal horizons with this baby.

[nelson]

There have been reports of the MAX1044 causing heterodyne whining. However I am just about to release an updated layout that corrects one error and also has a layout for using either a 15v a 18v PSU or two batteries in series. This will solve the noise issue with the 1044.

The reports of noise with teh original unit were all refering to the earlier SAD1024A version I believe the version with the "edge" switch.

[audioguy]

I would prefer to make it with the MAX1044- I dont want to mess with multiple batteries and different power supplies and all... so I'll build the current version.
Is the heterodyne whining happening on evry unit built, or just a handfull here and there?

[nelson]

It will be inherent in the pedals using the MAX1044. I do recommend using two batteries in series and or an 18v PSU.

However, build it and see.

Many EH pedals used two batteries in series.

Plus with the size of the layout getting them in a 1590BB shouldnt be a problem.

[audioguy]

OK Cool... I'll give the 2 batts a shot when you have the revised layout ready.

Thanks!

[goosonique]

Nice one Nelson 
What does this effect do ??

[audioguy]

Take a look here:
http://filters.muziq.be/model/eh/clonetheory
http://harshnoise.com/product_info/electro_harmonix_clone_theory

[Plexi]

Is possible recover the .pdf file?
Thanks!

[pinkjimiphoton]

plexi, talk to scruffie. he has a great project for this pedal.

you are better to use one 18-0-18v external transformer and feed that to the 15v regulator. less noise and more stable. i had a spare i sent to scruff, it may just be 18v. memory is dodgy

the noise is a factor in all of them, but the 1024 is the hissiest. if ya build this with metal films you can knock back quite a bit of the noise.

the "stereo" output is simply a jack wired directly to  the input jack in parallel. before the switch. literally. but it works great like that.

it wasn't meant to be a "stereo" chorus, it was meant to have a dry out and a chorused out.

i LOVE these things, the only kind of chorus i'll use. usually on a flangey vibe setting