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Xotic - BB Preamp

PostPosted: 26 Jun 2007, 15:54
by analogguru
Here are the:

Xotic BB preamp guts

enjoy,
analogguru

PostPosted: 12 Jul 2007, 10:35
by pakalolo
(admin edit: merged from another thread)

call1800ksmyazz wrote:This was posted on DIYstompboxes a while ago before my real account got banned :lol: . Actually, I think the actual posting of this schematic and me taking part in the discoussion was part of the reason for Aron getting pissed at me :lol:

Schem:
Image

Kerry


This schem is not AC nor RC but BB Preamp I think.......

PostPosted: 12 Jul 2007, 11:50
by tuemmueh
pakalolo wrote:This schem is not AC nor RC but BB Preamp I think.......


+1

But if I remember correctly (like I said, no need for TS here, I love my 30$-Rat ...), the only difference between BB/AC/RC is the number of diodes.

PostPosted: 13 Jul 2007, 14:08
by panday44
call1800ksmyazz.......thank you very much for the schematic. I've been searching for this for a long time..... :D :D :D .....
....Its working properly..and i did'nt remove the tone control of TS : :lol: :lol: ....
and I add the clipping diode...(tuemmueh...thanks for the tips!!!! :D ) ..

and now i will call this pedal "LANDXOTIC".......(you want a gut shot!!! :lol: :lol: )



Again thank you very much....KERRY and TUEMMUEH !!!!!!more schematic to come...and THANKS "FREESTOMPBOXES" :D :D :D

PostPosted: 13 Jul 2007, 16:20
by call1800ksmyazz
Thanks, and no problem panday44. Glad you are enjoying!

PostPosted: 13 Jul 2007, 22:35
by analogguru
Some month´s ago I saved some pictures but couldn´t really say what they are. So I stored them under "Fulltone". After reading this thread:
http://www.freestompboxes.org/viewtopic.php?t=137
and this thread:
http://www.freestompboxes.org/viewtopic.php?t=134
I rechecked the pictures and compared them to the pictures in the link above, and it seems that the picture are the guts of the:
Xotic BB preamp (gooped)

Xotic BB preamp (un-gooped)

this appears to be the corresponding BB Preamp schematic
viewtopic.php?f=7&t=11&p=50413#p50413

analogguru

PostPosted: 13 Jul 2007, 23:39
by call1800ksmyazz
Why didnt you just change the name of my thread and add your info there? :lol:

PostPosted: 13 Jul 2007, 23:50
by analogguru
Maybe somebody wants to place a RC/AC Boost schematic in the future or some guts ? :roll:

analogguru

PostPosted: 14 Jul 2007, 21:16
by kagaxdx
Some month´s ago I saved some pictures but couldn´t really say what they are. So I stored them under "Fulltone". After reading this thread:
http://www.phpbbserver.com/freestompbox ... stompboxes
and this thread:
http://www.phpbbserver.com/freestompbox ... stompboxes
I rechecked the pictures and compared them to the pictures in the link above, and it seems that the picture are the guts of the:
Xotic BB preamp (gooped)
Xotic BB preamp (un-gooped)
this appears to be the corresponding:
Xotic BB Preamp schematic
analogguru
I have those ones(gooped/un-gooped) saved here as the VOODOLABS SPARKLE DRIVE... :?

PostPosted: 14 Jul 2007, 23:09
by analogguru
If you look at the:
blown up Xotic BB-Preamp guts
you can recognize the same track-routing, the cables to the switch in the middle bottom, cables to the pots on the upper side, the 2 electrolytics at the left, the placement of the IC´s.....

analogguru

PostPosted: 16 Jul 2007, 10:57
by JHS
You can get nearly the same sound and overtones out of any TS if you you drop the voltage to app. 8V.

To me the BB sounds to compressed, even more than a TS or SD.

The schem was drawn by Kusi, who altered it a bit (he dropped an IC stage, and altered the gain control to a single pot).

JHS

PostPosted: 16 Jul 2007, 11:27
by invictus
woooot!!!

JHS in da house! :D :o

big welcome sir! glad you could join us here.


looking forward to your prolific posts. :wink:



...

PostPosted: 25 Jul 2007, 01:10
by Goop_buster
JHS wrote:You can get nearly the same sound and overtones out of any TS if you you drop the voltage to app. 8V.

To me the BB sounds to compressed, even more than a TS or SD.

The schem was drawn by k**i, who altered it a bit (he dropped an IC stage, and altered the gain control to a single pot).

JHS



Is there a PCB layout for this also?

Did the schematic author also (k***) change some values in the (baxandall) tone stack?

PostPosted: 25 Jul 2007, 01:14
by grolschie
Goop really annoys me.

PostPosted: 25 Jul 2007, 01:23
by Goop_buster
grolschie wrote:Goop really annoys me.


Thanks :wink:

To annoy you some more. With the given tone stack values there are plenty of boost and cut (ca 20 dB for bass and may be less...16 dB on treble) but the action (as I recognize it...however I may be wrong) are choosen for both very low frequencys and very high. In other words,the EQ looks almost taken from a circuit for hi-fi rather than something optimal for guitar. It just made me wonder if the values were the same as in the original. But I have not tried a real BB and it may work very nice IRL. Perhaps the BB is intended for Bass guitar also?

PostPosted: 25 Jul 2007, 10:31
by JHS
The values of the tonestack had not been changed.

JHS

PostPosted: 25 Jul 2007, 12:00
by Goop_buster
JHS wrote:The values of the tonestack had not been changed.

JHS


Thanks JHS :)

Xotic "L.A. Boutique Screamer" schematic

PostPosted: 01 Aug 2007, 05:48
by greenskull
I've been trying like hell to figure out what I could contribute here and remembered this from DIYstompboxes:
http://www.diystompboxes.com/smfforum/i ... ic=55014.0

Here's the schematic:
Image

LA Boutique Screamer JPG schematic

I created an image file from the original pdf. Hope it works out!!

PostPosted: 01 Aug 2007, 13:27
by call1800ksmyazz
haha we already have this posted in 2 other places on the forum. Its for the BB Preamp.

PostPosted: 01 Aug 2007, 13:56
by briggs
Ah, nevermind. It's cool that everyone is contributing all their knowledge.