jimbobothy Posted October 28, 2023 Share Posted October 28, 2023 … how does the lead free/vs lead solder interact with the components then? At the school I work at we only use lead free (for obvious reasons). Quote Link to comment Share on other sites More sharing options...
LukeFRC Posted October 28, 2023 Share Posted October 28, 2023 1 minute ago, jimbobothy said: … how does the lead free/vs lead solder interact with the components then? At the school I work at we only use lead free (for obvious reasons). lead based solder melts at a lower temprature - so it's a lot more forgiving and easy to warm everything up enough. Lead free, it might be my cheaper soldering iron, and I find it harder to get the joints to flow together properly. (mind you I never learned to solder properly, but I did learn to weld and braise at uni, and it's similar right?) Quote Link to comment Share on other sites More sharing options...
jimbobothy Posted October 28, 2023 Share Posted October 28, 2023 .. much lower temps involved with soldering. Probably more similar to brazing than welding. I’ll do some internet research at some point, cheers 👍🏼 Quote Link to comment Share on other sites More sharing options...
LukeFRC Posted October 28, 2023 Share Posted October 28, 2023 3 hours ago, jimbobothy said: .. much lower temps involved with soldering. Probably more similar to brazing than welding. I’ll do some internet research at some point, cheers 👍🏼 Same idea - it’s going to flow to hot things Quote Link to comment Share on other sites More sharing options...
LukeFRC Posted November 7, 2023 Share Posted November 7, 2023 Wouldn’t be a cheap build but… looks fun https://forum.pedalpcb.com/threads/nobelium-tube-bass-preamp-project.18932/ 2 Quote Link to comment Share on other sites More sharing options...
Bigwan Posted November 8, 2023 Share Posted November 8, 2023 7 hours ago, LukeFRC said: Wouldn’t be a cheap build but… looks fun https://forum.pedalpcb.com/threads/nobelium-tube-bass-preamp-project.18932/ Ordered! Quote Link to comment Share on other sites More sharing options...
LukeFRC Posted November 8, 2023 Share Posted November 8, 2023 1 hour ago, Bigwan said: Ordered! How much you price the whole project up at? I got £150-180 odd Quote Link to comment Share on other sites More sharing options...
Bigwan Posted November 8, 2023 Share Posted November 8, 2023 32 minutes ago, LukeFRC said: How much you price the whole project up at? I got £150-180 odd Haven't yet, just ordered PCB, faceplate and pre-drilled enclosure. Gonna be cheaper than any decent tube pre you'd buy used either way! Transformer will be the pricey and variable bit! Quote Link to comment Share on other sites More sharing options...
Passinwind Posted November 9, 2023 Share Posted November 9, 2023 On 28/10/2023 at 03:35, jimbobothy said: ... on another note, has anybody had any experience of replacing SMT stuff? I've heard it's pretty hard, not that I need to though, just wondering how it's done. I do it quite a bit with larger pitch SMDs and generally find it a little easier than through hole parts in a double sided board with plate-through pads. SMD desoldering tweezers or a hot air soldering/desoldering rig would often be the preferred tool, some ambidextrous people improvise with two soldering irons, and I just use a regular soldering iron with various tips to make things easier. For example, a 4mm screwdriver tip covers one side of an SO-8 opamp chip pretty much perfectly and for me well over half the parts are reusable. 2 Quote Link to comment Share on other sites More sharing options...
bartelby Posted November 9, 2023 Share Posted November 9, 2023 On 28/10/2023 at 11:35, jimbobothy said: ... on another note, has anybody had any experience of replacing SMT stuff? I've heard it's pretty hard, not that I need to though, just wondering how it's done. As @Passinwind says the larger size SMD stuff isn't too hard. My method is to add some solder to one pad, let it cool. Using tweezers hold the component in place on the soldered pad and reheat the solder. Once that's done and cool you can do the other pad. ICs are a little trickier but a similar method. I have a hot air soldering station, but only used that for removing components at the moment. I have a ridiculous modular synth project I've been putting off for years. I'm going to attempt that over the winter. 3 Quote Link to comment Share on other sites More sharing options...
Stub Mandrel Posted November 9, 2023 Share Posted November 9, 2023 On 28/10/2023 at 12:44, jimbobothy said: .. much lower temps involved with soldering. Probably more similar to brazing than welding. I’ll do some internet research at some point, cheers 👍🏼 Soft soldering very different skill set to brazing, although they both work similarly. Filler metal relies on a flux to creat the oxide free environment where filler metal can flow by capillary atteaction and form an intermetallic bond. Lead vs lead free is mostly just a higher temp needed in terms of making the joint. A drop of leaded can help melt big, stubborn lead free joints by improving how iron contacts the joint and slightly dropping the melting point. 1 Quote Link to comment Share on other sites More sharing options...
Bigwan Posted November 9, 2023 Share Posted November 9, 2023 On 07/11/2023 at 23:07, LukeFRC said: Wouldn’t be a cheap build but… looks fun https://forum.pedalpcb.com/threads/nobelium-tube-bass-preamp-project.18932/ Ordered the lightning boy transformer. Should have a lot of the passives in my stash with any luck! 1 Quote Link to comment Share on other sites More sharing options...
bloke_zero Posted November 9, 2023 Share Posted November 9, 2023 (edited) 5 hours ago, Bigwan said: Ordered the lightning boy transformer. Should have a lot of the passives in my stash with any luck! Where from? All I'm seeing is this one: https://www.lightningboyaudio.com/2020s.html Edit - sorry, I wasn't looking right: https://lightningboyaudio.com/store/p69/mic_input_transformer.html Edited November 9, 2023 by bloke_zero Quote Link to comment Share on other sites More sharing options...
bloke_zero Posted November 9, 2023 Share Posted November 9, 2023 Cool project! Quote Link to comment Share on other sites More sharing options...
Bigwan Posted November 9, 2023 Share Posted November 9, 2023 1 hour ago, bloke_zero said: sorry, I wasn't looking right: https://lightningboyaudio.com/store/p69/mic_input_transformer.html Yup that's the one! Quote Link to comment Share on other sites More sharing options...
disssa Posted November 12, 2023 Share Posted November 12, 2023 Sunn Beta Bass Preamp 9 Quote Link to comment Share on other sites More sharing options...
Bigwan Posted November 13, 2023 Share Posted November 13, 2023 On 08/11/2023 at 09:03, Bigwan said: Haven't yet, just ordered PCB, faceplate and pre-drilled enclosure. Gonna be cheaper than any decent tube pre you'd buy used either way! Transformer will be the pricey and variable bit! That was quick. Enclosure, PCB and faceplate arrived today! 1 Quote Link to comment Share on other sites More sharing options...
LukeFRC Posted November 14, 2023 Share Posted November 14, 2023 Here goes!! own pcb layout in a 1590b (all top jacks obv) 4 Quote Link to comment Share on other sites More sharing options...
LukeFRC Posted November 14, 2023 Share Posted November 14, 2023 Balls who forgot to get a 2n5089 Quote Link to comment Share on other sites More sharing options...
LukeFRC Posted November 20, 2023 Share Posted November 20, 2023 So I made my own pcb 1 Quote Link to comment Share on other sites More sharing options...
LukeFRC Posted November 20, 2023 Share Posted November 20, 2023 Which due to me being an idiot had one small mistake Quote Link to comment Share on other sites More sharing options...
LukeFRC Posted November 20, 2023 Share Posted November 20, 2023 But built up fine in a 1590b with top jacks … not masses of wiggle room though!! blue bits are tape on the back of pots and the input Jack. sounds great - I built a barbershop clone (v1) and the circuit is very similar - this is like it’s big heavier brother tonally, plus with eq 2 Quote Link to comment Share on other sites More sharing options...
DaleASmith Posted November 20, 2023 Share Posted November 20, 2023 pretty much off topic, but I just bought a second hand EHX Bass Blogger and the first thing I did was plug it into a 12v supply.. It's knackered. Any use to anyone? Quote Link to comment Share on other sites More sharing options...
paul_5 Posted November 20, 2023 Share Posted November 20, 2023 There's probably just a resistor (and/or) diode that's blown if you're lucky; it's likely that it's a quick and easy fix. 1 Quote Link to comment Share on other sites More sharing options...
LukeFRC Posted November 20, 2023 Share Posted November 20, 2023 3 hours ago, DaleASmith said: pretty much off topic, but I just bought a second hand EHX Bass Blogger and the first thing I did was plug it into a 12v supply.. It's knackered. Any use to anyone? There’s two chips TLC2272 I think would be the likely suspects - It looks all SMT? Quote Link to comment Share on other sites More sharing options...
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