Another one traced by evilarsen. It is supossed to be a good sounding booster/light overdrive/slightly fuzzy overdrive depending on the the switch setting.
Would the 4 knob just include a bias on Q2 and a contour on the input cap? Or is the current version a more complex circuit? I’m curious if anyone knows.
I likee. The switch controls how much gain you have. Similar to a sundial on a Sunface. It gets brighter with less gain. It has this growl that I love. Middle switch sounds like a tweedy drive, and then you have a higher gain drive sound which is punchy and then the third pos is pretty much full fuzz. But it retains that grinding tweed thing throughout. It cleans up so well with guitar volume that I’m not sure the Gain knob is even necessary. I’d be interested in knowing what the hell a 4 knob version would do. I used BC109b’s. Sounds schwing! Thanks evilarsen and fuzzhead and co.
For anyone thinking about giving this one a go, DEFINITELY socket the transistors! This circuit really changes a lot based on what BJTs you use and experimenting with different ones is TOTALLY worth it. The 549s and 109Cs sound great but I tried some really low gain pn2369 transistors and it really brought out the messy, low wattage tweed character that Tom mentioned in his comments. This is a really fun circuit!
Interesting, I had no idea the Embla started out as two knobs and a switch. Looking forward to trying it out.
ReplyDeleteI think that 10uF cap at the bottom needs to move over one space to make room for the Sw1 connection. also, where does the input go?
ReplyDeleteLooks like the input is probably the line beneath switch 2. The pull down resistor is further down that line.
ReplyDeleteYep. Input label and 10uF cap/cut moved.
ReplyDeleteYep. Input label and 10uF cap/cut moved.
ReplyDeleteSweet! You can tag it verified. What a weird little circuit given what the Embla became.
ReplyDeleteThanks Brian! Tagged.
DeleteWould the 4 knob just include a bias on Q2 and a contour on the input cap? Or is the current version a more complex circuit? I’m curious if anyone knows.
DeleteI really don't know, we cn only specualte until the current version is traced. But your ideas sounds plausible for sure!
DeleteI likee. The switch controls how much gain you have. Similar to a sundial on a Sunface. It gets brighter with less gain. It has this growl that I love. Middle switch sounds like a tweedy drive, and then you have a higher gain drive sound which is punchy and then the third pos is pretty much full fuzz. But it retains that grinding tweed thing throughout. It cleans up so well with guitar volume that I’m not sure the Gain knob is even necessary. I’d be interested in knowing what the hell a 4 knob version would do. I used BC109b’s. Sounds schwing! Thanks evilarsen and fuzzhead and co.
ReplyDeleteWell that's piqued my interest now!
DeleteUltimately, it’s a fuzzy drive. But a nice sounding one.
ReplyDeleteFor anyone thinking about giving this one a go, DEFINITELY socket the transistors! This circuit really changes a lot based on what BJTs you use and experimenting with different ones is TOTALLY worth it. The 549s and 109Cs sound great but I tried some really low gain pn2369 transistors and it really brought out the messy, low wattage tweed character that Tom mentioned in his comments. This is a really fun circuit!
ReplyDelete