Xotic - BB+

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Xotic - BB+

Postby telefone » 18 Aug 2008, 17:12

anybody trace one yet? Looks like the 'A' channel uses a single green LED and the 'B' channel uses a single 2N7000 for distortion 'color'.

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Re: Xotic - BB+

Postby AL » 19 Aug 2008, 14:47

telefone,

Check the top of the page in this section under announcements. There are a pile of schematics and gutshots.

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Re: Xotic - BB+

Postby telefone » 19 Aug 2008, 16:08

AL wrote:telefone,

Check the top of the page in this section under announcements. There are a pile of schematics and gutshots.

AL

Right, and this isn't one of them, so your point is?
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Re: Xotic - BB+

Postby AL » 19 Aug 2008, 18:44

telefone wrote:
AL wrote:telefone,

Check the top of the page in this section under announcements. There are a pile of schematics and gutshots.

AL

Right, and this isn't one of them, so your point is?


There is a shcem for an Xotic BB preamp. Is that not the same thing? My apologies for trying to be helpful. :roll:

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Re: Xotic - BB+

Postby telefone » 19 Aug 2008, 19:54

AL wrote:
telefone wrote:
AL wrote:telefone,

Check the top of the page in this section under announcements. There are a pile of schematics and gutshots.

AL

Right, and this isn't one of them, so your point is?


There is a shcem for an Xotic BB preamp. Is that not the same thing? My apologies for trying to be helpful. :roll:

AL

No, it's not the same thing. The BB+ has 2 channels and you can switch the order of them. The 2 channels are different than the original BB preamp (so I don't really understand the similar naming). There doesn't seem to be much interest in it.
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Re: Xotic - BB+

Postby telefone » 20 Aug 2008, 15:53

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Re: Xotic - BB+

Postby Cow4prez » 20 Aug 2008, 18:14

telefone wrote:anybody trace one yet


maybe you can be the first ;)
I wonder why they had to use 2 separate boards or just use a multilayer PCB. This seems more inefficient.
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Re: Xotic - BB+

Postby YuGi » 24 Jul 2010, 15:04

telefone wrote:anybody trace one yet? Looks like the 'A' channel uses a single green LED and the 'B' channel uses a single 2N7000 for distortion 'color'.


:hmmm: I quickly analyzed the pictures and does not seem to be so. Channel A has uno green LED + 2 diodes (one black like a 1N4001 and one ike a 1N914 but blue :scratch: ). Channel B has 2 blue diodes and 2 black diodes.
Someone knows more exactly the diodes used? I'm interested to a clone of this thing :mrgreen:
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Re: Xotic - BB+

Postby Jack Deville » 24 Jul 2010, 16:30

Who does the Xotic layouts?!
Amplifier & Effects Repair/Design/Construction:
http://www.jackdeville.com
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Re: Xotic - BB+

Postby MoonWatcher » 24 Jul 2010, 18:01

YuGi wrote:one ike a 1N914 but blue :scratch: ). Channel B has 2 blue diodes and 2 black diodes.
Someone knows more exactly the diodes used? I'm interested to a clone of this thing :mrgreen:


Blue diodes may indicate that they are Schottky barrier diodes. If you can get a number off of their bodies, you'll be good to go.
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Re: Xotic - BB+

Postby YuGi » 24 Jul 2010, 22:13

MoonWatcher wrote:
YuGi wrote:one ike a 1N914 but blue :scratch: ). Channel B has 2 blue diodes and 2 black diodes.
Someone knows more exactly the diodes used? I'm interested to a clone of this thing :mrgreen:


Blue diodes may indicate that they are Schottky barrier diodes. If you can get a number off of their bodies, you'll be good to go.


I find this photo on the net, unfortunately, only about A channel :mrgreen:
So I think the black diode is a 1N4005 :hmmm:, the blue one may be also a zener, but what means 46?
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Re: Xotic - BB+

Postby Mike31 » 25 Jul 2010, 03:57

Probably a BAT46 which is a Schottky.

That is definitely a different combo, a silicon/schottky against a green led.
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Re: Xotic - BB+

Postby YuGi » 25 Jul 2010, 10:12

Mike31 wrote:Probably a BAT46 which is a Schottky.

That is definitely a different combo, a silicon/schottky against a green led.

:applause:

B channel is probably silicon/schottky against silicon/schottky. :thumbsup
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Re: Xotic - BB+

Postby YuGi » 26 Jul 2010, 14:27

YuGi wrote:
Mike31 wrote:Probably a BAT46 which is a Schottky.

That is definitely a different combo, a silicon/schottky against a green led.

:applause:

B channel is probably silicon/schottky against silicon/schottky. :thumbsup


:hmmm: in the channal B circuit there is a transistor in series with the diodes (it seems that only pin 1 and 3 are connected).. maybe the 2N7000 mentioned by telefone?
Then the branchs are:
- 1N4005 - BAT46 -
- BAT46 - 1N4005 - 2N7000 -
:?:
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Re: Xotic - BB+

Postby jimbob_400 » 26 Jul 2010, 18:06

YuGi wrote:
YuGi wrote:
Mike31 wrote:Probably a BAT46 which is a Schottky.

That is definitely a different combo, a silicon/schottky against a green led.

:applause:

B channel is probably silicon/schottky against silicon/schottky. :thumbsup


:hmmm: in the channal B circuit there is a transistor in series with the diodes (it seems that only pin 1 and 3 are connected).. maybe the 2N7000 mentioned by telefone?
Then the branchs are:
- 1N4005 - BAT46 -
- BAT46 - 1N4005 - 2N7000 -
:?:


That would be my guess also.

I wonder what was crossing their minds when they decided to put schottky, 1n and a mosfet together :hmmm:
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Re: Xotic - BB+

Postby YuGi » 26 Jul 2010, 18:48

I think to reach a particular "forward voltage drop".
There is another transistor in the channel A side, but it do not seems to be connected to the diodes.. maybe a buffer :hmmm:
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Re: Xotic - BB+

Postby jimbob_400 » 27 Jul 2010, 11:03

BB+2.jpg

BB+.jpg


Does anyone own one of these or have any more gut shots? We have some part values to find :D
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Re: Xotic - BB+

Postby jstbrowsin » 09 Aug 2010, 09:16

bumpty bump I hope someone responds to this I'm keen as to make this one. [smilie=a_teeth.gif]
kev01 wrote:This one wins the gooooooooooop award. That has more silicone than Pamela Anderson.
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Re: Xotic - BB+

Postby ct88 » 11 Oct 2014, 14:38


For this message the author ct88 has received thanks: 8
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Re: Xotic - BB+

Postby andrewwoo » 27 Sep 2017, 02:54

Has anyone built this? I've always wanted a standalone pedal of the Channel B side of the BB+. Not sure if it's even possible.
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