Marshall - Bluesbreaker II (BB-2)

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Marshall - Bluesbreaker II (BB-2)

Postby goaltoday » 28 Aug 2007, 22:13

Hi! A friend of mine wants to change the range of the tone control. Anyone has got the schematic?

Some pictures he posted:

http://img209.imageshack.us/my.php?imag ... ll2jb5.jpg

http://img48.imageshack.us/my.php?image ... acana3.jpg

http://img115.imageshack.us/my.php?image=c12gk5.jpg

Million thanks!
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Postby The Rotagilla » 30 Aug 2007, 02:05

Try emailing Marshall tech support. I've found them very helpful in the past.
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Postby goaltoday » 30 Aug 2007, 11:03

I'll try that. Thanks!
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Postby N0F1 » 02 Nov 2007, 03:54

Hi goaltoday, did you get the schematic ?
I have one i'd like to mod.
Thanks.
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Postby goaltoday » 02 Nov 2007, 04:34

Yes. Someone send it to me but later I tried emailing Marshall tech support as Rotagilla told me and they send it me too. So just email them, very nice peolple. :D

If they don't send it to you PM your mail. :wink:
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Postby N0F1 » 02 Nov 2007, 05:15

Well i wanted to spare some time to their tech support, but finally i just emailed them. :lol: I'll get back to you if they dont answer. Thanks.
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Postby N0F1 » 02 Nov 2007, 14:00

They sent the schemo... this thing is straying away from the original BB...
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Postby frank.clarke » 04 Nov 2007, 21:32

Unless they have changed everything, the cap on the tone control would be worth looking at.
What is the clean boost, just a diode lift?
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Postby N0F1 » 04 Nov 2007, 22:06

Unless they have changed everything, the cap on the tone control would be worth looking at.


There's a fet/tranny arrangement which i think emulates a cathode follower to drive some kind of "FMV" tonestack.

What is the clean boost, just a diode lift?

I'm afraid not.

There you go :
http://thebin.free.fr/FSTBX/bb2.pdf
:)

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Postby frank.clarke » 05 Nov 2007, 16:04

Thanks, I'm flabbergasted :). Boost is the second opamp stage and tonestack bypassed, and something like a Vox tone stack. Well I never, thanks for the schematic!
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Postby bajaman » 05 Nov 2007, 20:53

a very interesting snippet - the fet gain stage followed by the bipolar buffer driving the tone stack - hmmmm :wink:
bajaman

ps: very stable feedback biasing - a very useful fet gain stage - I wonder how it would sound in a ROG type amp sim circuit :?: :wink:
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Postby frank.clarke » 07 Nov 2007, 19:52

I was wondering why they didn't do that on the Guv'nor Plus, but they rescaled it's tone stack instead, everything got multiplied by 10 (And a bass boost after the volume control, weird). If it isn't broke don't fix it. I would slap people for making "improvements" that change the sound of a successful product. But maybe it sounds so much better, I don't have all the boxes to compare. Sill, I like the Marshall boxes.

<edit: I got a cheap GV-2, it cuts treble in more than one place where it shouldn't. I made major EQ changes on it today. I'll have another listen in the morning.
Yup, just like a chicken sandwich, or the 18th century government.>

Here we go with doubletracked direct-to-soundcard Modded Guvnor GV-2, some poor quality echo on one track:
http://www.guitar-pedals-effects.com/Warrior3.mp3
Last edited by frank.clarke on 03 Dec 2007, 11:52, edited 5 times in total.
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Postby Redhouse » 03 Dec 2007, 05:52

frank.clarke wrote:I was wondering why they didn't do that on the Guv'nor Plus, but they rescaled it's tone stack instead, everything got multiplied by 10 (And a bass boost after the volume control, weird). If it isn't broke don't fix it. I would slap people for making "improvements" that change the sound of a successful product. But maybe it sounds so much better, I don't have all the boxes to compare. Sill, I like the Marshall boxes.


To tangent slightly, I'd like to slap the dumb arse at Wendy's that changed their chicken sandwich. For years thay had the best chicken sandwich, then like in ''03 or '04 it changed, has been not the best ever since....dumb arse's.
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Re: Marshall - Bluesbreaker II (BB-2)

Postby marushio_rima » 25 Sep 2018, 15:55

goaltoday wrote:Hi! A friend of mine wants to change the range of the tone control. Anyone has got the schematic?

Some pictures he posted:

http://img209.imageshack.us/my.php?imag ... ll2jb5.jpg

http://img48.imageshack.us/my.php?image ... acana3.jpg

http://img115.imageshack.us/my.php?image=c12gk5.jpg

Million thanks!



lost images :cry: :cry: :cry: :cry: :cry: :cry: :cry: :cry:
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Re:

Postby marushio_rima » 25 Sep 2018, 15:58

frank.clarke wrote:I was wondering why they didn't do that on the Guv'nor Plus, but they rescaled it's tone stack instead, everything got multiplied by 10 (And a bass boost after the volume control, weird). If it isn't broke don't fix it. I would slap people for making "improvements" that change the sound of a successful product. But maybe it sounds so much better, I don't have all the boxes to compare. Sill, I like the Marshall boxes.

<edit: I got a cheap GV-2, it cuts treble in more than one place where it shouldn't. I made major EQ changes on it today. I'll have another listen in the morning.
Yup, just like a chicken sandwich, or the 18th century government.>

Here we go with doubletracked direct-to-soundcard Modded Guvnor GV-2, some poor quality echo on one track:
http://www.guitar-pedals-effects.com/Warrior3.mp3



broken link :cry: :cry: :cry: :cry: :cry: :cry: :cry:
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