Bartolini - NTMB Bass Preamp  [schematic]

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.
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analogguru
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Post by analogguru »

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Bartolini - NTMB schematic
Bartolini - NTMB schematic
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.

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Post by xaxxop »

thank you very much :thumbsup
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Post by Silent Fly »

Thanks! :applause:
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Post by quaternotetriplet »

Hi, anyone got figured it out to hack it into a pedal??

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Post by Jarno »

Well, that's quite a bit different from what I would imagine it would look like, using inductors for the mids.
Might be an interesting build, but I'm having way too much fun with filterpreamps right now!

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Post by SPeter »

Great job Analogguru!
Many, many thanks! :applause:

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Fernando JFET
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Post by Fernando JFET »

First of all, sorry about my english, i´m from argentina... Could you tell me which unit´s schematic is that?? Becuase in the picture i can see 2 "boards" beside the pots... I hope you understand me.
Bye Bye

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george giblet
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Post by george giblet »

This 2001 circuit is either later NTMB or NTMB-918.

AFAIK, the the difference between the NTMB or NTMB-918 is some cap voltages, the docs are pretty much the same anyway.

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Post by chicago_mike »

I just did the layout of the modded one in eagle and will get a proto-layout tonight or tomorrow.

I am making this a 2 battery unit. Like the NTSMB-18 units. Im also going to add a switch for mid freq's.

What I dont know, is what value inductors to use. I guess I could steal from ampeg and mesa. :scratch:
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Post by SPeter »

Inductors are 150mH each!I've built the vero but have difficulties finding those inductors! Does anyone can direct me me to a source where to buy them! Thanks in advance!
:)

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Post by chicago_mike »

mouser, allied and digikey should have them.

otherwise just keep checking ebay? I havent gotten mine yet.
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Post by SPeter »

Thanks chicago_mike!
Cheers!
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Post by chicago_mike »

:thumbsup
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Post by quaternotetriplet »

Hi, chicago_mike,

please post the layout.

thanks

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Post by chicago_mike »

Its pretty ugly....

you sure you want it? Its double sided right now.. maybe you can help? :)
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Post by chicago_mike »

pm me with an email addy and Ill send you a zip file. :)
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quaternotetriplet
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Post by quaternotetriplet »

did you made it with eagle?

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Post by chicago_mike »

yeah
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Post by quaternotetriplet »

hey mike, why there are so many schem?

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Post by chicago_mike »

ohh...cause Im a dork. :(

I save all little or big changes as a new schematic / board layout.

the board layout on that sucks....I have no clue as to a good layout. :(
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