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Transistor matching?

Started by Haberdasher, June 14, 2010, 12:00:00 AM

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Haberdasher

Hi guys

I'm building my first fuzz circuit  (big muff pi variant) and I wanted to ask if it's a good idea to try and find 4 trannies with hfe's that are pretty close to one another.  Does it matter?

Also, I was reading somewhere about a month ago that people put them in order of lowest to highest (I think) but now I can't find where on the interwebz I found that discussion.  Does anyone subscribe to that theory?

thanks everyone
Looking for a discontinued madbean board?  Check out my THREAD

FABBED PCB's FOR SALE:
Now carrying Matched JFETS

Boom

Hey,

when I rebuild my BYOC Large Beaver (Big Muff Pi) to Violet RamĀ“s Head specs, I found this post on the BYOC forum very informative.

http://www.buildyourownclone.com/board/viewtopic.php?f=24&t=6006

He also writes about the transistor gain in each spot. Maybe this can help you out.

Is it ok to link to other content here, Brian ?

I took my schematic from here:

http://www.pisotones.com/BigMuffPi/psst/BMP_versions.htm

And this guy has some nice info as well:

http://rkerkhof.ruhosting.nl/Taas/Mods/Big%20Muff.htm

madbean

Absolutely! Link away, and thanks for doing so.

Haberdasher

Thanks boom, that was a good read.  8)
Looking for a discontinued madbean board?  Check out my THREAD

FABBED PCB's FOR SALE:
Now carrying Matched JFETS