itu Posted May 14, 2022 Share Posted May 14, 2022 That green one looks very good even without the electronics. How much is your circuitry consuming energy? Volts and milliamps? Could I put it inside a bass with a battery? 1 Quote Link to comment Share on other sites More sharing options...
Chienmortbb Posted May 14, 2022 Share Posted May 14, 2022 https://www.talkbass.com/wiki/pw3b-lpf-open-source-onboard-preamp/ 1 hour ago, itu said: That green one looks very good even without the electronics. How much is your circuitry consuming energy? Volts and milliamps? Could I put it inside a bass with a battery? @Passinwind will probably reply shortly but I know the history of this design. It was originally designed as an onboard pre-amp. The full details of that design is available on "The Other Place" and as I understand it, the latest iteration is designed as either an onboard or stomp box format. As for power consumption, I know that this was a major consideration in the choice of components and I believe that this version is designed for either 9V or 18V operation Thde original can be seen here. https://www.talkbass.com/wiki/pw3b-lpf-open-source-onboard-preamp/ 1 Quote Link to comment Share on other sites More sharing options...
Passinwind Posted May 14, 2022 Share Posted May 14, 2022 (edited) 10 hours ago, itu said: That green one looks very good even without the electronics. How much is your circuitry consuming energy? Volts and milliamps? Could I put it inside a bass with a battery? John covered most of it, but to flesh that out: The original open source one used LT1351 and LT1352 opamps and drew about 800uA @9V. For most of the newer onboard ones and probably all the pedals I've gone with OPA145 and OPA2145, which puts nominal consumption at around 1.4mA. I've had one like that in my 5 string bass for several months now and haven't gotten to the first battery change yet. The former two chips come in DIP-8 format (through hole parts) or as surface mount parts and the latter two are SMD only. The SMD boards (two in this version) are quite a bit more compact than the original board but are not as DIY friendly, so I have an intermediate solution in mind for if and when I release a new open source one. And then I have a pedal in mind with a few more features, for which I'm still considering all the obvious options like variable HPF, gain and volume controls, DI, headphone amp, Aux In for playalongs, etc. It would probably run on +/- 15V via one of the ubiquitous charge pump converter chips that are getting more and more popular. So, still would work fine on standard 9V pedalboard power and power conversion happens in the box. As John mentioned, the pictured pedal will be happy with anything from 9-18V, maybe higher even. Those boards should come in next week and the black box needs to be ready for my friend's NAMM booth first week in June. He requested that color scheme and the "chameleon" one is likely to be the default if I start selling these since reception has been very good for it. Edited May 14, 2022 by Passinwind 1 Quote Link to comment Share on other sites More sharing options...
disssa Posted June 6, 2022 Share Posted June 6, 2022 Peavey F-800 B Preamp: I used the factory schematics to create a pcb 4 Quote Link to comment Share on other sites More sharing options...
GrowlyBassDude Posted June 7, 2022 Share Posted June 7, 2022 I’ve lashed up this MM 2-band EQ recently and just finished it tonight. It won’t win any prizes for sexiest wiring, but it will work and hopefully sound good. 1 Quote Link to comment Share on other sites More sharing options...
Passinwind Posted June 9, 2022 Share Posted June 9, 2022 (edited) Finished up three different versions of my hybrid filter preamp pedals over the last few weeks: The latter two have some tweaks to enhance use with mandolin or acoustic guitar, but both still work well for bass too. The graphics on the last one came back from Tayda a bit dodgy, but live and learn...😉 Edited June 9, 2022 by Passinwind 3 Quote Link to comment Share on other sites More sharing options...
LukeFRC Posted June 30, 2022 Share Posted June 30, 2022 Anyone seen or built the Frog FX1 preamp pedal - fender showman or the Alembic based on it shrunk down to pedal size … making me tempted to build something again Quote Link to comment Share on other sites More sharing options...
bloke_zero Posted July 1, 2022 Share Posted July 1, 2022 14 hours ago, LukeFRC said: Anyone seen or built the Frog FX1 preamp pedal It caught my attention, but I ended buying a different PCB as I understood the Alembic was based on the old Acoustic 360 preamp (went down the rabbit hole on this one trying to find Larry Graham!) so I bought the PCB for one of these: http://www.lynx.net/~jc/pedals360.html But I've never built a single sided board before so it's sat in my todo pile for a long time - other peoples build threads seem pretty hairy compared to a through hole PCB build. I'd be interested to hear any experiences! Quote Link to comment Share on other sites More sharing options...
LukeFRC Posted July 1, 2022 Share Posted July 1, 2022 7 hours ago, bloke_zero said: It caught my attention, but I ended buying a different PCB as I understood the Alembic was based on the old Acoustic 360 preamp (went down the rabbit hole on this one trying to find Larry Graham!) so I bought the PCB for one of these: http://www.lynx.net/~jc/pedals360.html But I've never built a single sided board before so it's sat in my todo pile for a long time - other peoples build threads seem pretty hairy compared to a through hole PCB build. I'd be interested to hear any experiences! I'm not sure that's right - Alembic I always though was a fender tonestack? Quote Link to comment Share on other sites More sharing options...
Bigwan Posted July 1, 2022 Share Posted July 1, 2022 Busy while there... Built B3K, Vintage Microtubes and EQD Sea Machine clones and a Dunwich designed N.E.W. Bass Overdrive from GCI in the last month or so. While I like the Darkglass thing in moderation, 2 on the board and an AO900 amp is a bit overkill, so I have an Aion Maelstrom kit coming to cover both B3K and Vintage territory. Modulation isn't my thing but the Sea Machine might hang around for a while. REALLY like the Dunwich Bass Overdrive (Boss ODB-3 based). So much so I've ordered 3 other Dunwich clone PCBs from effects layouts for myself - Volt Thrower, ODB and Wizard Fuzz. 1 Quote Link to comment Share on other sites More sharing options...
Bigwan Posted July 1, 2022 Share Posted July 1, 2022 10 hours ago, bloke_zero said: It caught my attention, but I ended buying a different PCB as I understood the Alembic was based on the old Acoustic 360 preamp (went down the rabbit hole on this one trying to find Larry Graham!) so I bought the PCB for one of these: http://www.lynx.net/~jc/pedals360.html But I've never built a single sided board before so it's sat in my todo pile for a long time - other peoples build threads seem pretty hairy compared to a through hole PCB build. I'd be interested to hear any experiences! Have to agree with @LukeFRC, the Alembic is based on the Fender Dual Showman preamp. Quote Link to comment Share on other sites More sharing options...
bloke_zero Posted July 4, 2022 Share Posted July 4, 2022 Sorry for muddying the waters! Quote Link to comment Share on other sites More sharing options...
LukeFRC Posted July 6, 2022 Share Posted July 6, 2022 frog fx1 PCB ordered.... looks like I'm building pedals again! Quote Link to comment Share on other sites More sharing options...
paul_5 Posted July 6, 2022 Share Posted July 6, 2022 26 minutes ago, LukeFRC said: frog fx1 PCB ordered.... looks like I'm building pedals again! I'm curious as to how this sounds, keep us posted please. Quote Link to comment Share on other sites More sharing options...
LukeFRC Posted July 6, 2022 Share Posted July 6, 2022 Just now, paul_5 said: I'm curious as to how this sounds, keep us posted please. it's full of volts so could be a shocking build! Quote Link to comment Share on other sites More sharing options...
paul_5 Posted July 6, 2022 Share Posted July 6, 2022 (edited) It's not the volts that get yer, but the amps!! EDIT: as a tube preamp I'll assume that B+ is a couple of hundred Vdc, so look out for those too! Edited July 6, 2022 by paul_5 Quote Link to comment Share on other sites More sharing options...
LukeFRC Posted July 6, 2022 Share Posted July 6, 2022 yeahhhh - last build was a catlinbread SFT and a big muff on Vero, a chorus of some kind on a pCB all put in the same red box.... I was one of the first posters on this thread... then went through the "I don't do pedals" stage... then last few years used a Zoom B3n followed by the current HX stomp... so I am using pedals just not in the normal way pedal people do... Quote Link to comment Share on other sites More sharing options...
itu Posted July 6, 2022 Share Posted July 6, 2022 1 minute ago, paul_5 said: It's not the volts that get yer, but the amps!! It's not volts, it's not amps, but beware of watter! ...and getting my coat. Quote Link to comment Share on other sites More sharing options...
jazzyvee Posted July 7, 2022 Share Posted July 7, 2022 On 01/07/2022 at 20:26, Bigwan said: Have to agree with @LukeFRC, the Alembic is based on the Fender Dual Showman preamp. Alembic F-2B was based on the Tom Walker design for Fender Preamps. https://club.alembic.com/index.php?topic=288.msg1116#msg1116 1 Quote Link to comment Share on other sites More sharing options...
disssa Posted July 7, 2022 Share Posted July 7, 2022 Ampeg B-15N Preamp built according to original schematics (except power supply...) 4 Quote Link to comment Share on other sites More sharing options...
Groove Harder Posted July 7, 2022 Share Posted July 7, 2022 On 01/07/2022 at 20:24, Bigwan said: Busy while there... Built B3K, Vintage Microtubes and EQD Sea Machine clones and a Dunwich designed N.E.W. Bass Overdrive from GCI in the last month or so. While I like the Darkglass thing in moderation, 2 on the board and an AO900 amp is a bit overkill, so I have an Aion Maelstrom kit coming to cover both B3K and Vintage territory. Modulation isn't my thing but the Sea Machine might hang around for a while. REALLY like the Dunwich Bass Overdrive (Boss ODB-3 based). So much so I've ordered 3 other Dunwich clone PCBs from effects layouts for myself - Volt Thrower, ODB and Wizard Fuzz. How long does it take for the PCB's from Effects Layouts to arrive from the States? Quote Link to comment Share on other sites More sharing options...
Bigwan Posted July 7, 2022 Share Posted July 7, 2022 1 hour ago, Groove Harder said: How long does it take for the PCB's from Effects Layouts to arrive from the States? When they arrive I'll let you know! 1 Quote Link to comment Share on other sites More sharing options...
Bigwan Posted July 7, 2022 Share Posted July 7, 2022 1 hour ago, disssa said: Ampeg B-15N Preamp built according to original schematics (except power supply...) I'd love to do one of those. Do you have a schematic for your PSU? Quote Link to comment Share on other sites More sharing options...
Groove Harder Posted July 7, 2022 Share Posted July 7, 2022 21 minutes ago, Bigwan said: When they arrive I'll let you know! No probs! Cheers. Quote Link to comment Share on other sites More sharing options...
disssa Posted July 7, 2022 Share Posted July 7, 2022 27 minutes ago, Bigwan said: I'd love to do one of those. Do you have a schematic for your PSU? https://www.ledsales.com.au/kits/nixie_supply.pdf 1 Quote Link to comment Share on other sites More sharing options...
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