The Beano Boost is a simple variation on the humble Rangemaster treble booster - typical values for a Rangemaster, with a switched input cap for a broader boost range.
The transistor choice will make an audible difference as a one-transistor germanium circuit running hot. It can be something other than an OC44, as they are costly, but try a few and see what you like.
Quite a bit of info here on Analog Man's website
ANALOG MAN BEANO BOOST - TAG BOARD LAYOUTS
Same again, but with a pot to control the gain - with the 5k pot at around 50% the series resistance is about 3.5k depending on component tolerances. I think this is close enough to the stock 3.9k - you could use something a bit larger than 1k to get it closer, but it really doesn't make a massive difference.
This is handy for finding the sweet spot for just the right amount of grit in the boost.
ORIGINAL BEANO BOOST LAYOUT
Note that I've done it in two layers, as it's hard to show parts directly underneath each other in this format.
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ReplyDeleteI've been waiting for layout of beano boost.
ReplyDeleteNo problem Solderholic. I might try to replicate the same construction technique as Analog Man in another post.
DeleteHello!!! im interested in building this but can you tell me what is the value of the electric cap? 47 uf or 10 uf? regards!
ReplyDeleteHello - good point. I better fix that up. 47u
ReplyDeleteDone!! i used 47r instead of the 100 but i heard a noise, maybe it is because i wired with negative ground, when i have a battery clip i'll change the wiring to see how it works. Thanks man!!!!
DeleteHopefully that noise wasn’t an electrolytic popping. How long did you have it wired the wrong way?
Deletei start to research because i want to build the small version, i saw in reverb plenty of images with the pedal open, i think it uses a 1n5817 and a 100 uf direct into the boss style power jack, i hope it works!!!
DeleteYou can do it that way - just need a good power supply with isolated outputs. Still - be careful with you polarity.
DeleteHi,Andy.
ReplyDeleteI made beana boost by your layout.
It's very wild treble booster,so cool.
Thank you very well for your idea.
Added Vertex Steel string.
I post it on my web .
http://solderholic.html.xdomain.jp/img/file112.pdf
Hi,Andy
ReplyDeleteI just sent a beano boost I made with your layout to a friend of mine from high school and he loves it. He is a blues guitarist in France.
He is looking for a beano boost layout with an adjustable bias circuit added, as germanium transistors change their sound depending on the temperature. Is it possible to add a bias adjustable circuit to your layout?
Hello Solderholic - nice to hear from you. Would you like tag board, the same as your previous build, or are you OK with regular vero, or perhaps a point to point version? The D*A*M Red Rooster booster has a trimmer in place of the 3.9k resistor. I can adapt either one.
DeleteThank you,Andy.
ReplyDeleteI'd be happy to post "a point to point version".
As My friend is a live session player ,
I think he would like to use a potentiometer instead of a trimmer.
I want to put "10k lin pot of beano boost + bias adjustable pot "on the pedal ,
,not a trimmer.
Please do me a favor.
Got it, and that makes more sense for the purpose you described.
DeleteHello.
DeleteI just want to test something on the breadboard before making a layout.
Two choices.
1) replace the 68k resistor with a 47k resistor and a 25k pot.
2) replace the 3.9k resistor with a 5k pot
Thank you.
ReplyDeleteI have little electrical knowledge
and cannot make the proper choice.
I respect your choice.
Hello.
DeleteOption 2 worked best. However, it can be improved a little. I’ll post a layout shortly.
I’m sure your choices would be very good.
Thank you.
ReplyDeleteI look forward to seeing the new layout posted!