Xotic EP-Booster  [traced]

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

Re: Xotic EP-Booster

Postby wcraffonara » 10 Mar 2014, 13:52

Hi community,
I've successfully build my own PCB of the Xotic EP Booster Clone. Here is the build instruction manual if you are interested in:
https://www.dropbox.com/s/y1ds7zoig42as ... ooster.pdf

You can order this PCB by sending me a pm.

Regards & keep on rockin'!

For this message the author wcraffonara has received thanks:
Manfred (12 Mar 2014, 11:17)
wcraffonara
 
Posts: 9
Joined: 27 Jan 2011, 19:18
Has thanked: 0 time
Have thanks: 2 times

Re: Xotic EP-Booster

Postby Nacho5 » 24 Oct 2014, 19:24

wcraffonara wrote:Hi community,
I've successfully build my own PCB of the Xotic EP Booster Clone. Here is the build instruction manual if you are interested in:
https://www.dropbox.com/s/y1ds7zoig42as ... ooster.pdf

You can order this PCB by sending me a pm.

Regards & keep on rockin'!



link broken! :x
Nacho5
 
Posts: 27
Joined: 30 Aug 2012, 23:22
Location: Lujan, Argentina
Has thanked: 3 times
Have thanks: 4 times

Re: Xotic EP-Booster

Postby mecmast » 20 Feb 2015, 21:42

Hi,

Today i've tried this layout, but could not succeed.

Image

I've used:

- 100uf 25v caps
- 10uf 50v caps
- Q2: Couldnt find 2n5088 and tried "BC239" and "2SC1815" but didn't work.

Has anyone tried this layout? Is it really "verified"?
mecmast
 
Posts: 46
Joined: 29 Aug 2008, 13:40
Has thanked: 8 times
Have thanks: 2 times

Re: Xotic EP-Booster

Postby tabbycat » 20 Feb 2015, 22:11

mecmast wrote:Hi,

Today i've tried this layout, but could not succeed.

[ Image ]

I've used:

- 100uf 25v caps
- 10uf 50v caps
- Q2: Couldnt find 2n5088 and tried "BC239" and "2SC1815" but didn't work.

Has anyone tried this layout? Is it really "verified"?

harald has a very good reputation re his layouts. i would initially assume he wouldn't label it verified unless it was. had a quick look at the original page and notice freppo (who posts here) also built it with success, and he also knows his stuff. worth checking the original post for any updates or mods to the schematic just in case it has any idiosyncrasies.
http://www.sabrotone.com/?p=3186
http://www.sabrotone.com/?attachment_id=3185
and back through this thread in case subs for 2n5088 are suggested for this layout.

but i would say get some 2n5088 transistors (as specified by the layout's designer) before suspecting the layout might be out. i know it's a drag when you want to build and not wait for bits to arrive, but if it was specified as 2n5088 i would give that a go first.

i think all your caps should be 16v+ (as specified) if you intend to run it up to 18v. i haven't built this but have i built the ep3 18v pre at guitar fx layouts, but they are two kinds of the same thing (echioplex 3 pre).

good luck with it. they are nice things.
"be a good animal, true to your instincts" (d.h. lawrence).
"there is no excellent beauty that hath not some strangeness in the proportion" (francis bacon).
"ni dieu ni maître" (anarchist slogan).

For this message the author tabbycat has received thanks:
mecmast (21 Feb 2015, 14:09)
User avatar
tabbycat
Cap Cooler
 
Posts: 518
Joined: 03 Jul 2011, 01:09
Location: i could tell you but i'd have to kill you.
Has thanked: 227 times
Have thanks: 63 times

Re: Xotic EP-Booster

Postby Nocentelli » 20 Feb 2015, 23:31

mecmast wrote:- Q2: Couldnt find 2n5088 and tried "BC239" and "2SC1815" but didn't work.


You know both of those replacements have different pinouts to the 5088 shown on the layout?
mmolteratx wrote:absolutely zero commercial use allowed. If I find anyone selling these, I'll fly to your house and kick you in the nads. And you may or may not find yourself in trouble.

For this message the author Nocentelli has received thanks:
mecmast (21 Feb 2015, 14:10)
User avatar
Nocentelli
Tube Twister
 
Posts: 2061
Joined: 09 Apr 2009, 08:06
Location: Leeds, UK
Has thanked: 824 times
Have thanks: 825 times

Re: Xotic EP-Booster

Postby mecmast » 21 Feb 2015, 14:15

@tabbycat

First of all thanks for the reply.

I've re-checked the layout but everything seems ok.

I guess i'll try another schem/layout. It's really disturbing to try to find the problem with this. Building a new one seem easier :)

@Nocentelli

Thanks for the reply.

I've tried all the combinations, but no success :(
mecmast
 
Posts: 46
Joined: 29 Aug 2008, 13:40
Has thanked: 8 times
Have thanks: 2 times

Re: Xotic EP-Booster

Postby tabbycat » 21 Feb 2015, 18:25

@ mecast

this is the ep3 pre i built. there are various version here from basic to basic plus. xotic is just a twist on this.

http://tagboardeffects.blogspot.co.uk/2 ... llman.html

sometimes sticking with something and thrashing it out is worth it for the learning you get out of it. what you learn from that battle applies elsewhere henceforth, so good value.
but i've also had ones where the battle took more out of me than it was probably worth and i may have been wiser to walk away and start again.

it's your call. you know how much frustration you can put up with in return for what you may gain.

best of luck.

tabbycat.
"be a good animal, true to your instincts" (d.h. lawrence).
"there is no excellent beauty that hath not some strangeness in the proportion" (francis bacon).
"ni dieu ni maître" (anarchist slogan).
User avatar
tabbycat
Cap Cooler
 
Posts: 518
Joined: 03 Jul 2011, 01:09
Location: i could tell you but i'd have to kill you.
Has thanked: 227 times
Have thanks: 63 times

Re: Xotic EP-Booster

Postby mecmast » 21 Feb 2015, 19:56

@tabbycat

Thank you for all your best wishes:)

I'll try these layout asap.
mecmast
 
Posts: 46
Joined: 29 Aug 2008, 13:40
Has thanked: 8 times
Have thanks: 2 times

Re: Xotic EP-Booster

Postby mecmast » 10 Oct 2015, 15:26

Case solved.

I had forgotten to connect the grounds all together last time.

Yesterday i had built it.

Thank you all :)
mecmast
 
Posts: 46
Joined: 29 Aug 2008, 13:40
Has thanked: 8 times
Have thanks: 2 times

Re: Xotic EP-Booster

Postby Danila-Master » 11 Jan 2016, 22:13

Hello All.
I'm reading this thread third time and still can't understand.
The is 2n5457 - is this a confirmed original value? or it is deducted based on parameters and voltages?
Danila-Master
 
Posts: 8
Joined: 30 Jun 2013, 11:12
Has thanked: 1 time
Have thanks: 0 time

Re: Xotic EP-Booster

Postby fernsak » 21 Dec 2017, 22:05

Does anybody know how the +3db/unity gain switch is implemented in the v2? I guess adding a resistor in series with the pot instead of the 100uF in parallel with the 10uF cap would do the trick, but don't know for sure and would need the value of the resistor.
fernsak
 
Posts: 3
Joined: 01 Dec 2016, 21:48
Has thanked: 1 time
Have thanks: 0 time

Previous

Return to Boutique Stompboxes dissected...

Who is online

Users browsing this forum: harryhaller and 13 guests