Wampler - Tweed '57

Mbas974 · Post by **Mbas974** » 02 Jun 2012, 19:26

@ sinner, looks like equal but checking where these wires ends... take a look to full schematic these are for switch !!

Mbas974 · Post by **Mbas974** » 02 Jun 2012, 19:46

@askwho69, your point is right !
I really thing output cap is 1uF not 100nF. It should be equal value than c12.
Thanks for prompting it.

@ sinner what is filtering you post ? is what you see... or variation suggested ?

Intripped · Post by **Intripped** » 02 Jun 2012, 20:21

Mbas974 sarcasm detector --> status: OFF

roberttomasz · Post by **roberttomasz** » 02 Jun 2012, 20:42

..sinner ,cześć tomek-Szczecin.Całość jest ok.Jedynie dla przeanalizowania schematu i pcb brakuje mi połączeń w przełączniku/ mini switch.Coś nie tak z ścieżkami i ich pałączeń .Reszta wygląda ok.

lukatosh · Post by **lukatosh** » 02 Jun 2012, 21:02

Intripped wrote:Mbas974 sarcasm detector --> status: OFF

i'm still thinking about what was wrong with filtering....

Mbas974 · Post by **Mbas974** » 02 Jun 2012, 21:15

Last schematic with updates.

Updates :
- output cap 1uF
- Filter section (before last stage) as spotted by our great mentor (thanks again Sir !!)

Hey sinner... do you see the difference now ?
sarcasm detector --> status: ON ( ciao Intripped

)

Pls double check the filtering update ( lukatosh or anyone else ) so we can say final to this release.

lukatosh · Post by **lukatosh** » 02 Jun 2012, 23:10

Oh Come On guys! That's wrong... check the picture on page two..
the signal goes through 1uf Cap, the through 10k resistor and then arrives where 1.5 cap and two 10k resistors join together

please, correct me if i'm worng...

@ Mbas974: sinner was being sarcastic with his filtering...

bryan says that something is wrong with filtering... lets find it out!

Mbas974 · Post by **Mbas974** » 03 Jun 2012, 12:29

lukatosh,
check this new picture. Is one variation that seems makes sense.
If you approve I'll update circuit accordingly.

Intripped · Post by **Intripped** » 05 Jun 2012, 02:06

this is my try on REing
there are some minor differences with the previous schemes (some resistors values, one cap missing)

i've followed Mbas974' suggestion about the traces under the two 10K resistor in the filtering section - i agree with this interpretation

one last note: are we 100% sure about caps' values? - expecially the big cubic one indicated as 104 (100n). it really looks like a 1uF

sinner · Post by **sinner** » 05 Jun 2012, 06:04

Mbas974 wrote: Hey sinner... do you see the difference now ?
sarcasm detector --> status: ON ( ciao Intripped )

Turn your sense of humor status on

I'm never sarcastic, sarcasm is low kind of humor for frustrated paranoids.

No offense was intended then and now

Mbas974 · Post by **Mbas974** » 05 Jun 2012, 09:39

Sinner nothing personal at all.. just English gap here....

Intripped, acciamo convenuto che il cap è 1u e non 100n ( see above askwho69 post )

Mbas974 · Post by **Mbas974** » 05 Jun 2012, 10:14

I've chechked res code/colours... so
OK for 10K resistances in place 12K
Thanks for C9 (just missing!!)

Note for power protection :
I've checked the cheap power protection using 3904 and 3906, it's not good... , it reduce by 0,4V the power.
I've used the Mosfet P-Channel and it is ok 9V no loss ! ( http://www.geofex.com/Article_Folders/m ... switch.htm )

That's all for this pedal!!! Nice build to everyone.

Intripped · Post by **Intripped** » 05 Jun 2012, 13:39

Mbas974 wrote:I've chechked res code/colours... so
OK for 10K resistances in place 12K
Thanks for C9 (just missing!!)

other different values are:
res just before the volume pot is 100K
res used in the supply circuit, close to the transistor, should be 1 Ohm 1%

sorry for the cap question; i totally missed the conclusion - output cap is 1uF and not 100n (let's say it one more time)

...I like sarcasm...

Sinner please don't give up!

lukatosh · Post by **lukatosh** » 06 Jun 2012, 01:26

well... i've remade the PCB following Mba 974 work.

Not verified yet!... I don't have time to build this beauty...

PCB size are 56.88 x50.88 cm.

Enjoy...

Saludos desde chile!

IvIark · Post by **IvIark** » 07 Jun 2012, 20:18

Knock yourselves out!

IvIark · Post by **IvIark** » 08 Jun 2012, 00:03

Oops, I noticed I had the output from Q6 from the drain and not the source, the layout above has been corrected.

lukatosh · Post by **lukatosh** » 08 Jun 2012, 04:09

Hey guys!

hello once again!

i have a question... hope you can help me!

,

is there a way to increase overall bass of this pedal?... or maybe add a bass bost switch?

eemmm... yeah i know that the pedal was made to sound as it sounds but... i would like to increase those frecuencies a little bit without getting those kind of fuzzy sounds that you can see on some youtube videos

Excuse my bad english... hope you can understand!

Thanks so much!!

HHR18 · Post by **HHR18** » 08 Jun 2012, 11:24

Would it be possible to post the voltages of all the J201s? Since Brian matches all J201s before putting them into the circuit!

grrrunge · Post by **grrrunge** » 08 Jun 2012, 13:35

HHR18 wrote:Would it be possible to post the voltages of all the J201s? Since Brian matches all J201s before putting them into the circuit!

+1 !
Matching JFET's made a huge difference in my plexidrive...

Sweetalk · Post by **Sweetalk** » 08 Jun 2012, 13:42

1.5n bypass cap after the first stage??... it's that ok?

Wampler - Tweed '57 [traced]