BMP Tone Stacks: my collection...

[Skreddy]

I did a little research on how the tone stack in the BMP has changed over the various editions and have compiled a list of them.  I did it for myself, of course, but I'm sure a few of you will enjoy this info as much as I do. 

They are all in .tsc format, so download the ToneStackCalculator to view these.

(Here they are in a zip file; they may tend to get corrupted if you download them as .tsc files)

** links fixed **



 
   
     
   
   
   
   
   

TriangleKnob.tsc	1st edition
RamsHead.tsc	2nd edition
1975.tsc	3rd edition
LateModel.tsc	?
GreenRussian.tsc	?
USAReissue.tsc	The latest version from E.H.
SwollenPickle.tsc	Thank you, Mr. Huge
FlatMids.tsc	I just made this one up today (sometimes these things look good on paper, but you really have to try them out before you know how they'll sound)

[mudmen]

Nice
Do you have a schematic of Ram's Head Big Muff ? I'm looking for it

[Bernardduur]

links don't work

[yettirockc]

Yup, links are hosed....   I'm very interested, however.

[Skreddy]

My apologies for the bad links; it was late, and my brain's not so good when tired.

Here is a correct link to the directory where the files reside!

http://skreddypedals.com/circuits/ToneStacks/

[Skreddy]

Nice
Do you have a schematic of Ram's Head Big Muff ? I'm looking for it

The Ram's Head was made with 2N5087 transistors, which are PNP.  Therefore, the Ram's Head model is the one called "PNP" in the following pdf file compiled and hosted by http://singlecoil.com...
http://singlecoil.com/docs/vintage_muff.pdf

[mudmen]

Thanks !

[Urso]

Here you will find the tone stack of the latest model (2005) :
http://www.elixant.com/~stompbox/smfforum/index.php?topic=38976

The values are 22k/3.9n and 22k/10n.

[b_rogers]

how do you get these to go into tsc? i have downloaded them, but when i go to open on the tsc program they dont show up where i downloaded them to? any suggestions?

[Bernardduur]

I can't open them with my TSC 1.3; he says some floating point error stuff

[Eirik]

I can't open them with my TSC 1.3; he says some floating point error stuff

Same thing happens to me

[toneman]

works fine 4 me.

But, ....just 1 thing......
how do U know which graph is which 
I see U can use "sequence colors" option,
but,.......
which is which??   
with 3pots, and 3positions each(left/center/right), that's NINE graphs 
which is which   
Skreddy??
T

[Skreddy]

I can't open them with my TSC 1.3; he says some floating point error stuff

Try downloading the zip file to make sure the .tsc files aren't getting messed up during downloading.

Thanks for the USA Reissue info.  Added.

[Bernardduur]

Done that..... still that error

[Urso]

I can't open them with my TSC 1.3; he says some floating point error stuff

It's because of your regional settings on your Windows system. The floating point character on your system is probably set to a comma (,) whereas the files uses points (.)
You can do 2 things:
- change your regional settings, and change the floating point character to a point (.) in the Windows Control Panel (not recommended)
- edit each files with a text editor (such as notepad), and change all the points (.) to commas (,) (recommended)

Here are the edited files with commas: http://urso94.free.fr/diy/BMPToneStacks_with_commas.zip

When you will open the files, the graph in TSC isn't updated. You must move the mid slidebar to update the graph.

[Skreddy]

Thanks, Urso!  I never would have thought of that.

[Bernardduur]

Whahahahahahaha.....

Such a stupid thing!

[runmikeyrun]

i've never been able to get my BMP tone stacks to sound anything like the originals...

[Skreddy]

i've never been able to get my BMP tone stacks to sound anything like the originals...

It's not your tone stack, then; it's the other parts.  The transistors (contrary to popular opinion on this board) are vital to the creation of the voice of the BMP.  Followed by the type of capacitors you use, and finally the type of resistors.

Look for new old stock 2N5088's and 2N5133's, and try all the new ones you can find 'till you find some that sound like the sound in your head.  Also try BC239C and even BC109C for lower gains, or 2N5089 for higher gains.  I prefer BMPs made with transitors that have gains in the 500 - 800 range.  You'll have to experiment yourself to find what makes the tone you want. 

Also, OH I forgot to mention the diodes.  !!!  You can get a LOT of mileage from playing with different diode configurations.

[the dude]

Nice
Do you have a schematic of Ram's Head Big Muff ? I'm looking for it

The Ram's Head was made with 2N5087 transistors, which are PNP.  Therefore, the Ram's Head model is the one called "PNP" in the following pdf file compiled and hosted by http://singlecoil.com...
http://singlecoil.com/docs/vintage_muff.pdf

I opened up a original ram's head the other week and it had 2n5089's in it. Might have been a very early model perhaps?