Stub Mandrel Posted December 14, 2023 Share Posted December 14, 2023 On 11/12/2023 at 16:00, rwillett said: @MichaelDean I was advised to put three layers but that seems an awful lot. Thanks You dont even need to worry about small gaps. The wavelength of 50Hz electromagnetic interference is 4000km which is slightly larger than the average bass... Quote Link to comment Share on other sites More sharing options...
Geek99 Posted December 14, 2023 Share Posted December 14, 2023 On 11/12/2023 at 15:54, rwillett said: I know I'm going to have to shield the various cavities. I've a roll of 10m x 20mm copper tape with conducting adhesive. How many payers should I lay down for it? 1, 2 or 3. I want to be sure and one is enough, great, but if I need three layers, I'll get some more copper tape. Any suggestions welcomed. Thanks Rob One Quote Link to comment Share on other sites More sharing options...
rwillett Posted December 14, 2023 Author Share Posted December 14, 2023 6 minutes ago, Stub Mandrel said: You dont even need to worry about small gaps. The wavelength of 50Hz electromagnetic interference is 4000km which is slightly larger than the average bass... Ok, thats new and news to me. So could I have a Faraday Cage with (for example 1cm) bands running across it? Rob Quote Link to comment Share on other sites More sharing options...
SamIAm Posted December 14, 2023 Share Posted December 14, 2023 1 hour ago, Stub Mandrel said: You dont even need to worry about small gaps. The wavelength of 50Hz electromagnetic interference is 4000km which is slightly larger than the average bass... But what about non mains hum interference ... from dimmer switches, fluorescent lights, some cell phones, computers, etc? In this video about shielding, they even talk about picking up local taxi radios! S'manth x Quote Link to comment Share on other sites More sharing options...
Richard R Posted December 14, 2023 Share Posted December 14, 2023 2 hours ago, Stub Mandrel said: 4000km .. is slightly larger than the average bass... Thank you, @Stub Mandrel. That sent me down an Internet rabbit hole of large musical instruments, strange musical instruments in science fiction, strange musical instruments in reality, and various other diversions. I have resurfaced bearing this completely irrelevant but amusing link for everyone: https://www.classicfm.com/discover-music/latest/weirdest-musical-instruments/ Enjoy. 3 2 Quote Link to comment Share on other sites More sharing options...
Stub Mandrel Posted December 17, 2023 Share Posted December 17, 2023 On 14/12/2023 at 20:16, Smanth said: But what about non mains hum interference ... from dimmer switches, fluorescent lights, some cell phones, computers, etc? In this video about shielding, they even talk about picking up local taxi radios! S'manth x It's a matter of proportion. The small size and shape means big holes will allow the wiring to 'stick out' and pick up hum, but smaller holes won't matter. Remember 2mm holes in the grid behind the window of a microwave stop signals in th GHz band. Taxi radios... haven't heard one of those break through since the 80s! 1 Quote Link to comment Share on other sites More sharing options...
tauzero Posted December 17, 2023 Share Posted December 17, 2023 On 14/12/2023 at 16:32, Smanth said: Yes, ultimeter FTW @MichaelDean! What an excellent neologism. A meter to measure just how good something is. Poor, mediocre, good, excellent, ultimate. 3 Quote Link to comment Share on other sites More sharing options...
rwillett Posted December 21, 2023 Author Share Posted December 21, 2023 I have finally got the guitar into a reasonable state. This week I've: 1. Redesigned the middle pickguard three times to make it fit 2. Discovered I missed two pickguard nuts to hold the middle pickguard on. As the guitar is glued together now I can't fix it easily. 3. Had the wiring loom redone as it was 50mm too short. Big shout out to James at Home of Tone for being a superstar to help me out. 4. Discovered that I need to leave more gaps in the cavities as stuff was shorting out. My multimeter has been working overtime. After all that, managed to string it and play it into Garageband. It works and there is zero hum. Very pleased about that. I need to play about with the pick height, with the nut height and the bridge height. I need to paint the plywood backbone but ignored it for this week as I wasn't sure how long it would take to dry. The guitar is bascially there, I'm no Jimi Hendrix but it sounds great, it certainly growels Its a playable guitar, I'm not sure I want to change the pickups, but I will investigate painting it with epoxy resin. Thanks Rob 10 Quote Link to comment Share on other sites More sharing options...
Owen Posted December 21, 2023 Share Posted December 21, 2023 Absolutely top job! 1 Quote Link to comment Share on other sites More sharing options...
rwillett Posted December 21, 2023 Author Share Posted December 21, 2023 On 28/10/2023 at 15:17, Owen said: I am happy to take full responsibilty for my actions. As the guitar is mainly finished, I feel I can send you the invoices 1 Quote Link to comment Share on other sites More sharing options...
Owen Posted December 21, 2023 Share Posted December 21, 2023 23 minutes ago, rwillett said: As the guitar is mainly finished, I feel I can send you the invoices Trololololololol! Quote Link to comment Share on other sites More sharing options...
Andyjr1515 Posted December 21, 2023 Share Posted December 21, 2023 Looks fantastic. Inspiring! Quote Link to comment Share on other sites More sharing options...
Stub Mandrel Posted December 21, 2023 Share Posted December 21, 2023 Congratulations! Benedigedig! Quote Link to comment Share on other sites More sharing options...
SamIAm Posted December 21, 2023 Share Posted December 21, 2023 Absolutely brilliant! S'manth x Quote Link to comment Share on other sites More sharing options...
Paul S Posted December 21, 2023 Share Posted December 21, 2023 I like the look of it as it is, really interesting. Quote Link to comment Share on other sites More sharing options...
rwillett Posted December 21, 2023 Author Share Posted December 21, 2023 Just now, Paul S said: I like the look of it as it is, really interesting. Close up, its very industrial looking. As its made up of seven parts, they need to be joined together, so there are lines. Also as I use two printers to speed things up, there are slight variations. I have the original one which is now surplus, so after the new year, I'll fill, sand that one down, then paint it and try the epoxy resin as a finish. Not sure if I make a V3 or try a bass next. I've started collecting the bass bits as I have an idea for a headless but need to think about it some more before I commit. I've used an awful lot of black PETG on V1 and V2. I didn;t really count but suspect 5-7 rolls getting things right. I have an idea to use less filament but it needs to simmer for a few weeks as I think about it. Rob 3 Quote Link to comment Share on other sites More sharing options...
Richard R Posted December 21, 2023 Share Posted December 21, 2023 Absolutely superb! Can you post some close-ups too? Quote Link to comment Share on other sites More sharing options...
rwillett Posted December 21, 2023 Author Share Posted December 21, 2023 Here you are. Depending on the light some things look worse or better. For instance the edge in the picture below looks like the dogs chewed it. Barely noticable when you look at it normally. You can also see the two unused screw holes in the middle pickguard. As the pickguard is strong enough with the screws it currently has, I'll reprint it without the holes. here you can just see the copper tape creating the Faraday cage. I may reprint the pickguards to cover it up. The light highlights blemishes quite well, which is a bit annoying. I am very picky, which is why I might still sand it, spray it and epxoy resin it so it's a good finish. Rob 4 Quote Link to comment Share on other sites More sharing options...
rwillett Posted December 21, 2023 Author Share Posted December 21, 2023 I'll probably play about with it over Xmas so as I open it up, I'll take more photos. Off to watch Arthur Christmas with the kids for the 97th time. Rob 2 1 Quote Link to comment Share on other sites More sharing options...
MichaelDean Posted December 21, 2023 Share Posted December 21, 2023 That's looking great! You could do shiplap edges to the pickguard to get it all neat. I might also be overthinking that! 1 Quote Link to comment Share on other sites More sharing options...
rwillett Posted December 21, 2023 Author Share Posted December 21, 2023 The pick guard was supposed to be a single piece tailor made. My printer can't do it in one piece so it's an interim/possibly not interim solution. I might send the CAD file to a specialist company to make one but I wanted to get it working first. I was rather worried about hum but that's non existent. I may true different pickups as well. The wiring loom was adapted to put tiny screw connectors in so changing pickups is just unscrewing the cables. No soldering needed. Let's see how it goes. Rob 1 Quote Link to comment Share on other sites More sharing options...
Richard R Posted December 22, 2023 Share Posted December 22, 2023 Thanks for posting the detailed photos. I can see now why you want to finish it further, the top edge would annoy me too. Though I would probably just sand it. I would cheat with the pickguard too, glue two screheads flat over the holes rather than print a new one, and just trim that excess foil back with a sharp blade. Overall though, it still looks the business. Now it just depends on whether you want a perfect finish, or a "post manufacture pre-reliced" look. 2 Quote Link to comment Share on other sites More sharing options...
rwillett Posted December 22, 2023 Author Share Posted December 22, 2023 The top edge doesn't annoy me. It is quite smooth but for some reason looks horrible in the picture. Whst does annoy me are the very small differences in height in the components, probably due to small tolerance differences between machines. Doing the middle pick guard again is a few hours printing so no big deal. If you do 3d printing, you learn patience. Rob 1 Quote Link to comment Share on other sites More sharing options...
Richard R Posted December 22, 2023 Share Posted December 22, 2023 9 minutes ago, rwillett said: If you do 3d printing, you learn patience Perhaps I should take it up then? 😁 1 Quote Link to comment Share on other sites More sharing options...
tauzero Posted December 22, 2023 Share Posted December 22, 2023 You may have watched the Youtube video of the spinning guitar neck. At about 9 minutes in, you get a fairly short view of the body that he's 3D printed, which looks quite kewl. Might be worth a look. It's not a gappy hexagons structure, it's solid, seems to be in four sections maybe, and is the face of a multilayered plywood body. 1 Quote Link to comment Share on other sites More sharing options...
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