Wednesday, December 14, 2016
Red Llama + BMP tone stack
I drew this up last month on a whim, built it and it actually sounds pretty good. It's just a Red Llama with a Big Muff tone stack tacked on to the end. Ripe for tweaking to your own taste, especially with the values of the tone section. I changed the values to give boosted mids, but those are easily changed (consult google for different tone stack values), and I used 47n caps instead of 68n and 33n that are normally in a Red Llama (only because I have a ton of that value in my parts stash haha).
cool!!!
ReplyDeleteany vid with this mods??
Nice
ReplyDeleteSorry for being offtopic, but what's the fonts type name? Thanks in advance!
ReplyDeleteNo worries. I'm kind of a font freak and sort of surprised no one has asked about my font selection before. haha
DeleteThat one is Hamma Mamma Jamma
http://www.dafont.com/hamma-mamma-jamma.font
Me too! When it comes down to do my enclosure design I'm always looking for the most suitable fonts for the type of effect. This one looks perfect for old school fuzz boxes are phaser or vibe'ish effects. Thank you for sharing that information with me! :)
DeleteDoes the Tone Stack modify the original Red Llama general drive and tone? For example: less bass response, etc.
ReplyDeleteIf you use the values I posted then yes (to some extent) since I used values in the tone stack that will boost the mids. However, if you change up those values to have a flat response, then any tone change from the original should be hard to discern.
DeleteIf I want to bypass the tone stack, all I have to do is cut trace between 10uF cap and 33k res/10nF cap... cut trace between tone 2 and vol 3... and jump them with e DPDT switch.
ReplyDelete10uF to DPDT lug 2, 33k/10nF to lug 1, vol 3 to lug 5, tone 2 to lug 4. Lugs 3 and 6 jumped. http://4.bp.blogspot.com/-q4tY61gLF9Y/VX8L3ZXEjxI/AAAAAAAAFLU/JiaV_a8Oa3o/s640/Switch%2BNumbering%2BGuide.png
Am I right?
Yep you've got it!
DeleteGreat!
DeleteThe perfboard and the pcb for etching aren't reversed.
ReplyDeleteI built one of these on the Vicuna PCB and was pretty unimpressed. The first 80% of the gain pot was barely even audible and had zero treble. It went from being tepid mud to full gain with almost no subtlety in between. I set it aside for a few weeks then came back to it. I checked the schematic and realized the 1M gain pot was also acting as a high pass filter, so not only was it decreasing gain by decreasing resistance in the feedback loop-it was adding that resistance to the output, lowering volume and treble.
ReplyDeleteI soldered a jumper between pins 2 and 3 on the gain pot and IT CAME ALIVE! This thing's AWESOME. Very touch responsive and open sounding, and useable across the entire gain range.