Xotic EP-Booster  [traced]

General documentation, gut shot, schematic links, ongoing circuit tracing, deep thoughts ... all about boutique stompboxes.

Re: Xotic EP-Booster

Postby Greg » 11 Feb 2010, 13:20

brightboy wrote:Did you properly compensate your scope probes before taking those pictures?

Jeff


Yes, the probes are fine...
the sloped lines on the clipped portion are due to the fact the 'scope was set on AC.. my friend who's smarter than me tells me that for low frequencies I need to set it on DC, or use an external coupling cap.
The results are still valid, but set to DC the slope is gone.
culturejam wrote: We are equal opportunity exposure artists.
User avatar
Greg
Old Solderhand
 
Posts: 3319
Joined: 03 Nov 2007, 10:35
Location: Australia
Has thanked: 77 times
Have thanks: 195 times

Re: Xotic EP-Booster

Postby audioguy » 14 Feb 2010, 01:41

elrengofa wrote:hope you find it usefull :)


Has this been verified??
audioguy
Resistor Ronker
 
Posts: 259
Joined: 27 Nov 2007, 15:47
Has thanked: 24 times
Have thanks: 6 times

Re: Xotic EP-Booster

Postby jbgron » 15 Feb 2010, 02:32

audioguy wrote:
elrengofa wrote:hope you find it usefull :)


Has this been verified??


I'm waiting for verification too, anyone?
jbgron
Breadboard Brother
 
Posts: 81
Joined: 16 Sep 2008, 01:03
Location: Melbourne, Australia
Has thanked: 18 times
Have thanks: 5 times

Re: Xotic EP-Booster

Postby audioguy » 15 Feb 2010, 14:31

I etched one last night. I'll post results
audioguy
Resistor Ronker
 
Posts: 259
Joined: 27 Nov 2007, 15:47
Has thanked: 24 times
Have thanks: 6 times

Re: Xotic EP-Booster

Postby jsrfo » 24 Feb 2010, 18:27

New guy, so be easy on me.

I am looking for the correct and updated circuit of the EP booster, and was wondering if it is the one on PDF titled EPA Booster. Also, again, being the new guy, I am not sure how or where a stomp switch would be wired into the circuit, or why the circuit shows SW1 and SW2.

I see two switches in the schematic, but the actual Xotic EP booster I used only had a stomp switch, power LED, and the cool knob that lights up.

If I can see something, I can generally take it apart and rebuild it, but, I am finding it a bit harder to read schematics and translate them into stomp switches, jacks, and potentiometers, so any help would be greatly appreciated.
jsrfo
 
Posts: 22
Joined: 23 Feb 2010, 03:36
Has thanked: 0 time
Have thanks: 0 time

Re: Xotic EP-Booster

Postby Greg » 25 Feb 2010, 01:04

jsrfo wrote:New guy, so be easy on me.

I am looking for the correct and updated circuit of the EP booster, and was wondering if it is the one on PDF titled EPA Booster. Also, again, being the new guy, I am not sure how or where a stomp switch would be wired into the circuit, or why the circuit shows SW1 and SW2.

I see two switches in the schematic, but the actual Xotic EP booster I used only had a stomp switch, power LED, and the cool knob that lights up.

If I can see something, I can generally take it apart and rebuild it, but, I am finding it a bit harder to read schematics and translate them into stomp switches, jacks, and potentiometers, so any help would be greatly appreciated.


The 2 switches are just little DIP switches mounted on the board to provide some eq trim.

As far as the footswitch goes, you need to get a diagram of how to wire an effect with a 3PDT switch and it'll explain all.
The info at www.tonepad.com is good.
culturejam wrote: We are equal opportunity exposure artists.
User avatar
Greg
Old Solderhand
 
Posts: 3319
Joined: 03 Nov 2007, 10:35
Location: Australia
Has thanked: 77 times
Have thanks: 195 times

Re: Xotic EP-Booster

Postby jbgron » 25 Feb 2010, 01:09

Has this actually been verified yet?
jbgron
Breadboard Brother
 
Posts: 81
Joined: 16 Sep 2008, 01:03
Location: Melbourne, Australia
Has thanked: 18 times
Have thanks: 5 times

Re: Xotic EP-Booster

Postby Greg » 25 Feb 2010, 01:37

jbgron wrote:Has this actually been verified yet?


Well... several people have built one in various forms if you read the thread.
The pics of the board are there, a schematic.. I think you have everything you need.

Why not build one and tell us how it works.
culturejam wrote: We are equal opportunity exposure artists.
User avatar
Greg
Old Solderhand
 
Posts: 3319
Joined: 03 Nov 2007, 10:35
Location: Australia
Has thanked: 77 times
Have thanks: 195 times

Re: Xotic EP-Booster

Postby jbgron » 25 Feb 2010, 01:50

OK, I'll build one this weekend. I actually collect Echoplexes and other vintage tape delays so I can compare it to the real thing and let you know. Am I correct in assuming that the EPA! Booster is the only PCB available at this stage?
jbgron
Breadboard Brother
 
Posts: 81
Joined: 16 Sep 2008, 01:03
Location: Melbourne, Australia
Has thanked: 18 times
Have thanks: 5 times

Re: Xotic EP-Booster

Postby Greg » 25 Feb 2010, 01:55

BTW - here's an example of why this thing was such a PITA to trace..
This single connection changes sides on the board through vias no less than 5 times , while travelling under the pot, the Electro, etc.

Green is top of board, red is bottom.
You do not have the required permissions to view the files attached to this post.
culturejam wrote: We are equal opportunity exposure artists.
User avatar
Greg
Old Solderhand
 
Posts: 3319
Joined: 03 Nov 2007, 10:35
Location: Australia
Has thanked: 77 times
Have thanks: 195 times

Re: Xotic EP-Booster

Postby Theo » 26 Feb 2010, 00:28

Hi, I've built this booster and changed the layout so dipswitches could be used , dimensions of the print are 45x25mm
I like the sound , there's not much volume boost but it works well with my guitar and amp , slightly fattening the sound .

Image
Image
Theo
 
Posts: 7
Joined: 22 Jan 2010, 22:13
Location: Holland
Has thanked: 0 time
Have thanks: 2 times

Re: Xotic EP-Booster

Postby sinner » 27 Feb 2010, 10:27

Theo wrote:Hi, I've built this booster and changed the layout so dipswitches could be used , dimensions of the print are 45x25mm
I like the sound , there's not much volume boost but it works well with my guitar and amp , slightly fattening the sound .

Image
Image


Hi, thats fucking uber cool, but don't you think it would be nice to post your layout, as a form of thank you?
sinner
Old Solderhand
 
Posts: 4810
Joined: 06 Nov 2008, 18:16
Location: ...no more
Has thanked: 1240 times
Have thanks: 1099 times

Re: Xotic EP-Booster

Postby Theo » 27 Feb 2010, 13:17

Here it is thank you for tracing :applause:
Note: R6 in this layout should be 1K, not 10K.
EP booster.gif

EP layout.gif
You do not have the required permissions to view the files attached to this post.

For this message the author Theo has received thanks: 2
Barcode (14 Sep 2014, 05:35), sinner (03 Feb 2011, 20:08)
Theo
 
Posts: 7
Joined: 22 Jan 2010, 22:13
Location: Holland
Has thanked: 0 time
Have thanks: 2 times

Re: Xotic EP-Booster

Postby sinner » 27 Feb 2010, 13:49

:hug: Thank you
sinner
Old Solderhand
 
Posts: 4810
Joined: 06 Nov 2008, 18:16
Location: ...no more
Has thanked: 1240 times
Have thanks: 1099 times

Re: Xotic EP-Booster

Postby Moska » 27 Feb 2010, 20:34

Hello this is my first post in the forum and my first contribution, I have seen that there are some PCBs, but is never more have some options
: D

Sorry for my not speak english, but yes google

1 hug from Brazil
You do not have the required permissions to view the files attached to this post.
User avatar
Moska
 
Posts: 6
Joined: 27 Feb 2010, 19:01
Has thanked: 7 times
Have thanks: 39 times

Re: Xotic EP-Booster

Postby jsrfo » 02 Mar 2010, 14:51

Just one question. All the circuits and PCB's shown in this thread seem to be equivalent. I did notice that on Theo's post, the R6 is listed as having a value of 10K, and the other circuits call out a 1K resisitor.

Does it matter, and if so, which is correct, 10K or 1K??

Thanks.
jsrfo
 
Posts: 22
Joined: 23 Feb 2010, 03:36
Has thanked: 0 time
Have thanks: 0 time

Re: Xotic EP-Booster

Postby Greg » 02 Mar 2010, 15:31

jsrfo wrote:Just one question. All the circuits and PCB's shown in this thread seem to be equivalent. I did notice that on Theo's post, the R6 is listed as having a value of 10K, and the other circuits call out a 1K resisitor.

Does it matter, and if so, which is correct, 10K or 1K??

Thanks.


The schematic is on the first page of the thread..
:thumbsup
culturejam wrote: We are equal opportunity exposure artists.
User avatar
Greg
Old Solderhand
 
Posts: 3319
Joined: 03 Nov 2007, 10:35
Location: Australia
Has thanked: 77 times
Have thanks: 195 times

Re: Xotic EP-Booster

Postby jsrfo » 02 Mar 2010, 16:06

Greg,

I saw that, and on yours, Elrengora's, and Moska's parts list, the R6 (or its equivalent) is listed as 1K and on the parts list that Theo submitted, that value was changed to 10K.

I assume that 1K is correct, but want to verify, before I start to build this.

Thanks
jsrfo
 
Posts: 22
Joined: 23 Feb 2010, 03:36
Has thanked: 0 time
Have thanks: 0 time

Re: Xotic EP-Booster

Postby Greg » 02 Mar 2010, 17:28

jsrfo wrote:Greg,

I saw that, and on yours, Elrengora's, and Moska's parts list, the R6 (or its equivalent) is listed as 1K and on the parts list that Theo submitted, that value was changed to 10K.

I assume that 1K is correct, but want to verify, before I start to build this.

Thanks


The schematic is right, so any changes are a variation or a mistake.
culturejam wrote: We are equal opportunity exposure artists.
User avatar
Greg
Old Solderhand
 
Posts: 3319
Joined: 03 Nov 2007, 10:35
Location: Australia
Has thanked: 77 times
Have thanks: 195 times

Re: Xotic EP-Booster

Postby Theo » 02 Mar 2010, 18:20

jsrfo wrote:Greg,

I saw that, and on yours, Elrengora's, and Moska's parts list, the R6 (or its equivalent) is listed as 1K and on the parts list that Theo submitted, that value was changed to 10K.

I assume that 1K is correct, but want to verify, before I start to build this.

Thanks


R6=1k .. sorry my mistake :oops:

Theo
Theo
 
Posts: 7
Joined: 22 Jan 2010, 22:13
Location: Holland
Has thanked: 0 time
Have thanks: 2 times

PreviousNext

Return to Boutique Stompboxes dissected...

Who is online

Users browsing this forum: No registered users and 5 guests