LukeFRC Posted August 22 Share Posted August 22 11 hours ago, bremen said: Just found this thread. I posted elsewhere that I've cloned the sansamp bass driver and have a couple of spare boards, anyone want one? £0 That looks cool - which version? And 1590bb? Quote Link to comment Share on other sites More sharing options...
bremen Posted August 22 Share Posted August 22 (edited) This one. Yes, 1590bb. It works, haven't compared it to a real one but I've heard the original described along the lines of "adding a bit if ampeg type grit". Does that, works as a preamp when used with a slave, or an effect when used in front of a bass amp. Edited August 22 by bremen 1 Quote Link to comment Share on other sites More sharing options...
LukeFRC Posted August 22 Share Posted August 22 1 minute ago, bremen said: This one. What is 1590bb? It works, haven't compared it to a real one but I've heard the original described along the lines of "adding a bit if ampeg type grit". Does that, works as a preamp when used with a slave, or an effect when used in front of a bass amp. Enclosure size - 120x94mm Quote Link to comment Share on other sites More sharing options...
bremen Posted August 22 Share Posted August 22 It works upside down, too 😍 2 Quote Link to comment Share on other sites More sharing options...
bremen Posted August 22 Share Posted August 22 13 minutes ago, LukeFRC said: Enclosure size - 120x94mm True 👍 Quote Link to comment Share on other sites More sharing options...
bobbass4k Posted August 22 Share Posted August 22 17 hours ago, bremen said: Just found this thread. I posted elsewhere that I've cloned the sansamp bass driver and have a couple of spare boards, anyone want one? £0 It's hard to tell scale, are the smd resistors/caps mostly 0805? Quote Link to comment Share on other sites More sharing options...
nilebodgers Posted August 22 Share Posted August 22 23 hours ago, bremen said: Just found this thread. I posted elsewhere that I've cloned the sansamp bass driver and have a couple of spare boards, anyone want one? £0 Now that is nice work. I’ve just designed and made my first SMT board for 22 years. I can’t believe I used to do this stuff without a magnifier. (and a proper lab with expert technicians to do things too fiddly for the design engineers!) Quote Link to comment Share on other sites More sharing options...
nilebodgers Posted August 22 Share Posted August 22 (edited) 23 hours ago, bremen said: Edited August 22 by nilebodgers Duplicate post Quote Link to comment Share on other sites More sharing options...
bremen Posted August 22 Share Posted August 22 5 hours ago, bobbass4k said: It's hard to tell scale, are the smd resistors/caps mostly 0805? Mostly 0805 yes. Some of the caps are 0603 - I looked for what was cheapest available C0G from Mouser. Quote Link to comment Share on other sites More sharing options...
itu Posted August 22 Share Posted August 22 By the way: where's @disssa? Making the ultimate preamp, or has he turned to power amps lately? Quote Link to comment Share on other sites More sharing options...
bobbass4k Posted August 24 Share Posted August 24 On 22/08/2024 at 20:33, bremen said: Mostly 0805 yes. Some of the caps are 0603 - I looked for what was cheapest available C0G from Mouser. That's fine, should still be doable by hand - I'm very tempted to give one a try, how did you assemble it without a silkscreen, have you got a BOM with a key to the footprints? Quote Link to comment Share on other sites More sharing options...
bremen Posted August 24 Share Posted August 24 I had the altium schematic and board on screen. I can make assembly drawing pdfs if you want to have a go. Quote Link to comment Share on other sites More sharing options...
bobbass4k Posted August 25 Share Posted August 25 23 hours ago, bremen said: I had the altium schematic and board on screen. I can make assembly drawing pdfs if you want to have a go. I wouldn't want to put you out, the schematic and PCB layout should be enough, don't have altium but should be able to get them into KiCad - if you don't mind sending me the files I'll happily take a PCB, been a while since I've done a fully SMT board, should be an interesting challenge. Quote Link to comment Share on other sites More sharing options...
bremen Posted August 25 Share Posted August 25 No it's cool, making assembly drawings from the altium files is easy. Pm me your address. Quote Link to comment Share on other sites More sharing options...
Passinwind Posted August 28 Share Posted August 28 (edited) Back to EQ pedals lately, as I wrap up my Github open source respository. Very old battery powered NAMM build repurposed: Another old one brought up to current 4 knob specs: 4 knobs but with fixed frequency HPF embedded: And then my first battery powered six knob job, using OPA205 and OPA2205 low current opamps: I've also been revisiting my older through-hole compact ones, which fit in a smaller 125 enclosure and are a much quicker build since everything is on one board: Edited August 28 by Passinwind 3 Quote Link to comment Share on other sites More sharing options...
disssa Posted August 30 Share Posted August 30 Markbass Little Mark II Preamp: 5 Quote Link to comment Share on other sites More sharing options...
LukeFRC Posted September 2 Share Posted September 2 took a while to bug fix this... but a Mutron iii (Aion's Lumitron) with a couple of mods... a decay knob and the "Moog filter" mod that does something and makes it sound different 2 Quote Link to comment Share on other sites More sharing options...
rainbowreality Posted September 4 Share Posted September 4 On 21/08/2024 at 21:04, bremen said: Just found this thread. I posted elsewhere that I've cloned the sansamp bass driver and have a couple of spare boards, anyone want one? £0 I'd love one if you have one going spare? Quote Link to comment Share on other sites More sharing options...
RonC Posted September 9 Share Posted September 9 (edited) How do you guys print/paint the box so nice?? Edited September 9 by RonC Quote Link to comment Share on other sites More sharing options...
bobbass4k Posted September 10 Share Posted September 10 What PCB prototyping services have people used recently? I traced the fuzzrocious heliotropic years ago and i couldn't remember how it sounded so I breadboarded it this weekend and it's great. Bit unwieldy for stripboard but I've knocked a PCB together in kiCad. $37 for 3 from oshpark. Will I get cheaper than that? I know years ago oshpark was pretty much the only game in town but I know a few other prototyping services have popped up. I know Digikey do it but as an employee of Farnell I can't give money to the enemy... Quote Link to comment Share on other sites More sharing options...
LukeFRC Posted September 10 Share Posted September 10 6 hours ago, bobbass4k said: What PCB prototyping services have people used recently? I traced the fuzzrocious heliotropic years ago and i couldn't remember how it sounded so I breadboarded it this weekend and it's great. Bit unwieldy for stripboard but I've knocked a PCB together in kiCad. $37 for 3 from oshpark. Will I get cheaper than that? I know years ago oshpark was pretty much the only game in town but I know a few other prototyping services have popped up. I know Digikey do it but as an employee of Farnell I can't give money to the enemy... I’ve used Elecrow you can use the prototyping service and 10pcb costs about £5 posted - takes ages and you have to get the kicad file right. (Tip standard hole size is not big enough for diy pedals!) Quote Link to comment Share on other sites More sharing options...
nilebodgers Posted September 10 Share Posted September 10 JLPCB. Very cheap, good quality and delivery is quicker than I’d have expected for the cheap options. 1 Quote Link to comment Share on other sites More sharing options...
bremen Posted September 10 Share Posted September 10 Jlcpcb is so cheap, fast and such good quality that I suspect they're a loss leader for some sinister purpose. So user-friendly too, upload the gerbils (I'll let that one in 😄) and you get a preview so you know you've not forgotten a layer. 1 Quote Link to comment Share on other sites More sharing options...
bobbass4k Posted September 10 Share Posted September 10 (edited) 3 hours ago, bremen said: Jlcpcb is so cheap, fast and such good quality that I suspect they're a loss leader for some sinister purpose. So user-friendly too, upload the gerbils (I'll let that one in 😄) and you get a preview so you know you've not forgotten a layer. Okay yeah £2.68 for 5 PCBs delivered feels like it shouldn't be profitable. I used to be a buyer for a contract manufacturer and that's not far off the wholesale/volume prices we used to pay with negotiated discounts... Anybody fancy a heliotropic PCB when they arrive? I can post the schematic when I'm home, but it's basically a modified Muff (no clipping on the 2nd gain stage) that goes straight into a preamp/boost with a Muff tonestack. Edit - apologies, £3.60 for Lead Free HASL. Still cheaper than some coffee's i've bought recently... Edited September 10 by bobbass4k Quote Link to comment Share on other sites More sharing options...
Sibob Posted September 10 Share Posted September 10 10 hours ago, bobbass4k said: Okay yeah £2.68 for 5 PCBs delivered feels like it shouldn't be profitable. I used to be a buyer for a contract manufacturer and that's not far off the wholesale/volume prices we used to pay with negotiated discounts... Anybody fancy a heliotropic PCB when they arrive? I can post the schematic when I'm home, but it's basically a modified Muff (no clipping on the 2nd gain stage) that goes straight into a preamp/boost with a Muff tonestack. Edit - apologies, £3.60 for Lead Free HASL. Still cheaper than some coffee's i've bought recently... Yup, will have a Heliotropic PCB off you 🙂 Cheers Si Quote Link to comment Share on other sites More sharing options...
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