Wampler - Cranked AC

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Re: Wampler - Cranked AC

Postby Hernan Maza » 07 Jan 2010, 23:14

Hernan Maza wrote:Hi guys, I tell them I made this pedal and it sounds fanstatico for my taste, but I happen two problems and wanted to see if someone can help me.
The first is to gain a500k pot at the end of the trail is short I sound, but I try several passes with all the potentiometers???

the sgeundo problem is that when you connect the deluxe memory man delay, makes me sound very sharp and really stops the pedal sound good, I guess it is a matter of impedance has been happening with me and several pedals as it solves the impedance ???

thank you very much, I hope for your comments!



please can you help me with this problem???
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Re: Wampler - Cranked AC

Postby mrkaploca » 08 Jan 2010, 14:48

Hernan Maza wrote:
Hernan Maza wrote:Hi guys, I tell them I made this pedal and it sounds fanstatico for my taste, but I happen two problems and wanted to see if someone can help me.
The first is to gain a500k pot at the end of the trail is short I sound, but I try several passes with all the potentiometers???

the sgeundo problem is that when you connect the deluxe memory man delay, makes me sound very sharp and really stops the pedal sound good, I guess it is a matter of impedance has been happening with me and several pedals as it solves the impedance ???

thank you very much, I hope for your comments!



please can you help me with this problem???

Don't quite understand what u mean,especially the first question(try to explain better on english).
Concerning the second question,in wich order do u connect pedals?
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Re: Wampler - Cranked AC

Postby Hernan Maza » 08 Jan 2010, 16:48

mrkaploca wrote:
Hernan Maza wrote:
Hernan Maza wrote:Hi guys, I tell them I made this pedal and it sounds fanstatico for my taste, but I happen two problems and wanted to see if someone can help me.
The first is to gain a500k pot at the end of the trail is short I sound, but I try several passes with all the potentiometers???

the sgeundo problem is that when you connect the deluxe memory man delay, makes me sound very sharp and really stops the pedal sound good, I guess it is a matter of impedance has been happening with me and several pedals as it solves the impedance ???

thank you very much, I hope for your comments!



please can you help me with this problem???

Don't quite understand what u mean,especially the first question(try to explain better on english).
Concerning the second question,in wich order do u connect pedals?



the problem is that when you put the maximum gain the sound goes out, and change of potentiometers and is not the problem and where to look

Thnaks
Hernan Maza
 
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Re: Wampler - Cranked AC

Postby mrkaploca » 08 Jan 2010, 18:17

Excuse me if I consider you a total beginner...The gain pot acts as a volume control for the rest of the circuitry(similar to amp gain pot...) so when u decrease the gain it sends more and more signal to ground.Maybe you put a pot in a reversed position??if not,check your JFET-s.
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Re: Wampler - Cranked AC

Postby RnFR » 08 Jan 2010, 22:59

i think he said there was squealing when it is turned all the way up??? :scratch:
he end of the trail is short I sound,

if so, try a small (<1000pF) compensation cap between gate and drain of the first stage. this might help any oscillation you are getting.
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Re: Wampler - Cranked AC

Postby Hernan Maza » 08 Jan 2010, 23:33

mrkaploca wrote:Excuse me if I consider you a total beginner...The gain pot acts as a volume control for the rest of the circuitry(similar to amp gain pot...) so when u decrease the gain it sends more and more signal to ground.Maybe you put a pot in a reversed position??if not,check your JFET-s.



mrkaploca sorry I'm a beginner, the pot is ok, all JFETs which should prove that takes 6 JFET
and thanks for helping me! and apologies for my bad English
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Re: Wampler - Cranked AC

Postby Sweetalk » 09 Jan 2010, 02:55

Hernan Maza wrote:
mrkaploca wrote:Excuse me if I consider you a total beginner...The gain pot acts as a volume control for the rest of the circuitry(similar to amp gain pot...) so when u decrease the gain it sends more and more signal to ground.Maybe you put a pot in a reversed position??if not,check your JFET-s.



mrkaploca sorry I'm a beginner, the pot is ok, all JFETs which should prove that takes 6 JFET
and thanks for helping me! and apologies for my bad English


Hernán, como te dijeron arriba el control de ganancia actúa como un control de volumen. Cuando está al máximo directamente deja pasar toda la señal sin derivarla a masa, o sea, es casi como si no estuviera. Seguro que el potenciómetro está bien?, fijate las soldaduras frías. Sacalo, puenteá C2 con R4 (que se une con los Gate de la segunda etapa) y fijate si tenés sonido.

Sino una solución que a mi entender es "poco elegante" puede ser efectiva sería poner una resistencia en serie a la pata central de potenciómetro como para hacer un tope y que nunca llegue al máximo. Por lo que veo en el esquema debería funcionar perfecto ese pedal.

Con respecto al tema de las impedancias o agregás un buffer a la salida del pedal (después del potenciómetro de volumen) o usá un pedal con buffered bypass entre este y el MM, obviamente en bypass, :mrgreen: :mrgreen: .

Well in english!!!!

As they said the gain pot acts as a volume pot. When it's maxed the signal passes straigth. Are you sure that the pot it's fine?, no cold soldering?. Take it out of the circuit, short C2 with R4 and the second stage Gates and see if you have sound.

Another solution (although it's not so fancy for me) it's to put an resistor to the center lug of the pot to limit the max gain.

The output it's unbuffered, you can have impedance issues with other pedals, put a buffer after the volume pot or use a buffered bypass pedal between this and the MM, obviously in bypass!!! :mrgreen: :mrgreen:
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Re: Wampler - Cranked AC

Postby Hernan Maza » 10 Jan 2010, 00:26

Sweetalk wrote:
Hernan Maza wrote:
mrkaploca wrote:Excuse me if I consider you a total beginner...The gain pot acts as a volume control for the rest of the circuitry(similar to amp gain pot...) so when u decrease the gain it sends more and more signal to ground.Maybe you put a pot in a reversed position??if not,check your JFET-s.



mrkaploca sorry I'm a beginner, the pot is ok, all JFETs which should prove that takes 6 JFET
and thanks for helping me! and apologies for my bad English


Hernán, como te dijeron arriba el control de ganancia actúa como un control de volumen. Cuando está al máximo directamente deja pasar toda la señal sin derivarla a masa, o sea, es casi como si no estuviera. Seguro que el potenciómetro está bien?, fijate las soldaduras frías. Sacalo, puenteá C2 con R4 (que se une con los Gate de la segunda etapa) y fijate si tenés sonido.

Sino una solución que a mi entender es "poco elegante" puede ser efectiva sería poner una resistencia en serie a la pata central de potenciómetro como para hacer un tope y que nunca llegue al máximo. Por lo que veo en el esquema debería funcionar perfecto ese pedal.

Con respecto al tema de las impedancias o agregás un buffer a la salida del pedal (después del potenciómetro de volumen) o usá un pedal con buffered bypass entre este y el MM, obviamente en bypass, :mrgreen: :mrgreen: .

Well in english!!!!

As they said the gain pot acts as a volume pot. When it's maxed the signal passes straigth. Are you sure that the pot it's fine?, no cold soldering?. Take it out of the circuit, short C2 with R4 and the second stage Gates and see if you have sound.

Another solution (although it's not so fancy for me) it's to put an resistor to the center lug of the pot to limit the max gain.

The output it's unbuffered, you can have impedance issues with other pedals, put a buffer after the volume pot or use a buffered bypass pedal between this and the MM, obviously in bypass!!! :mrgreen: :mrgreen:



Muchas gracias por tu buena respuesta!!!!
Hernan Maza
 
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Joined: 06 Oct 2009, 01:43

Re: Wampler - Cranked AC

Postby mrelwood » 24 Feb 2010, 09:52

I wanted to make this pedal quickly and didn't want to wait for the PCB. And wanted to learn. And wanted to contribute, even a bit. Although, most of you will buy the PCB...

Here's a perf board layout, squeezed pretty tight. Will directly fit only 16mm angled PCB pots.

Image

Building one right now.
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Re: Wampler - Cranked AC

Postby mrelwood » 24 Feb 2010, 14:04

Sorry, the above layout has a mistake. Fixing...
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Re: Wampler - Cranked AC

Postby HENK » 24 Feb 2010, 18:20

Thanks!
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Re: Wampler - Cranked AC

Postby mrelwood » 25 Feb 2010, 12:44

Okay, here we go. Mistakes fixed both in building and in the layout... live & learn. What I learned is that I don't like dotted perf board. I thought I did. Going to do on stripes from now on.

Image
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Re: Wampler - Cranked AC

Postby lpstudio » 25 Feb 2010, 16:08

Hey has anyone built from RnFR's layout yet?
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Re: Wampler - Cranked AC

Postby Woodraw » 10 Mar 2010, 00:14

Just want to share this. Great rock-pedal! It really makes fun to play with it.
On the board below two caps lying over resistors. This is fixed on the layout yet.

Hope my english is ok :)
Sven

Image
Image
Image
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Re: Wampler - Cranked AC

Postby LooseCannon » 18 Mar 2010, 09:03

Did anyone try out the ToneClone kit?
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Re: Wampler - Cranked AC

Postby DocPlus » 24 Mar 2010, 04:56

I bought 2 cranked AC PCB from toneclone, and it sounds great.
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Re: Wampler - Cranked AC

Postby sjturbo » 25 Mar 2010, 00:52

The schematic is very similar to the ROG English Channel in theory and execution it seems to me. Other than the parallel jfets and extra gain stage and tone control vs tone stack. Should the sound be much different?
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Re: Wampler - Cranked AC

Postby newly » 29 Mar 2010, 02:53

sjturbo wrote:The schematic is very similar to the ROG English Channel in theory and execution it seems to me. Other than the parallel jfets and extra gain stage and tone control vs tone stack. Should the sound be much different?


I build both and also the OLC Matchbox (with the tone schematic striped).
Personally, EC sound weak among the 3.
Matchbox has the sound for low gain (or clean) while cranked AC is, as the name implied, cranked AC sound!!
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Re: Wampler - Cranked AC

Postby lutor » 30 May 2010, 00:31

I want give my personal layout for perfboard good look:
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Re: Wampler - Cranked AC

Postby lutor » 30 May 2010, 12:30

In the precedence layout, there is one little error in the gain pot link.
This is correct:
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