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Post by Dolando on Jan 23, 2023 16:28:23 GMT
It seems to me that it's the bass response that will be adversely affected if there is no all-round seal under the cone - my understanding is that it's that underneath-the-cone area where low frequencies are generated, & a good airtight seal is necessary for this; though of course with an electric instrument this may not be such a consideration. Not sure what it will affect, but my thinking is also as its a small chamber, so it may get a little choked and they will act a bit like a port in a speaker cabinet.
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Post by pete1951 on Jan 23, 2023 20:05:22 GMT
It seems to me that it's the bass response that will be adversely affected if there is no all-round seal under the cone - my understanding is that it's that underneath-the-cone area where low frequencies are generated, & a good airtight seal is necessary for this; though of course with an electric instrument this may not be such a consideration. Yes iI have heard this idea before, not sure it’s quite right. I think that you will get more or less the same sound from above and below the cone. However the under cone sound has to go farther to be heard and there is some treble loss.( bass goes round corners better than treble) There will also be some ‘phase ‘ cancellation as some frequencies will be 180 degrees out of phase. So a mic on the cone will sound louder and more treble than the sound from F holes or grills. I have basically made this up , with little knowledge of acoustics, others on the forum may have different explanations Pete
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Post by Dolando on Jan 23, 2023 21:10:59 GMT
So I got a chance to get this stung up and wow what a difference. It’s been really interesting hearing it before and after I drilled the holes in the well.
Before it sounded a little muted or muffled and like it was being choked, or struggling, but now sounds a lot more open. I wouldn’t say it gave it more bass response, but certainly made it sound more controlled. It was also very heavy in the lower mids but the holes have created a little more clarity in the top end, so overall a lot more balanced.
Now I just need to see how the stability of the cone goes. To be honest, looking closely at it, it feels pretty strong. Im not sure if they all have it but mine has a folded over lip on the edge. I know from my monitor building experience adds quite a bit of strength, so I’m pretty hopeful.
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Post by pete1951 on Jan 24, 2023 11:54:47 GMT
Though it may sound better at the moment, I would be worried about the long term effects of pressure on the unsupported areas of the cone. If it’s a ‘ cheap but good ‘ Far East made cone it might be a useful experiment. I am talking very long term here, it could be months or even years before the cone started to ‘dip’ into the holes . I might expect some rattling as it drops. Pete
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Post by Dolando on Jan 24, 2023 13:09:42 GMT
In the interest of experimentation, I reckon I will add some material to where I've left the well quite narrow (left and right) as the pressure here will possibly be higher. This then leaves a large amount of surface area (at least 80%) on the top, bottom, left and right, with minimal parts of the cone not supported. As string pressure is distributed throughout the cone, I think this should be enough to not cause an issue, but we shall see. Isn't experimenting fun! haha.
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Post by Michael Messer on Jan 24, 2023 13:24:51 GMT
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Post by Dolando on Jan 24, 2023 15:13:56 GMT
My intentions?? I'm just a guitar builder who is here sharing the building process and journey of a build, that's it. I thought that some like minded people here would enjoy seeing it come to fruition.
I've never tried to advertise, sell, or promote my guitars on here. They aren't linked to my profile in any way. If anyone see's me as being underhanded in some way, then I apologise. I'm here for nothing but the love of resonators and sharing what I'm building.
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Post by Michael Messer on Jan 24, 2023 15:24:15 GMT
Thank you for your reply and hopefully for not being offended by my question.
It has happened before. Sometimes, because we are a friendly, helpful and very knowledgeable community, people see us like ducks in a barrel at the fair.
Shine On Michael
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Post by richclough on Jan 25, 2023 14:34:43 GMT
…because we are a friendly, helpful and very knowledgeable community, people see us like ducks in a barrel at the fair. Shine On Michael Or shooting a sitting fish? 😉
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Post by Dolando on Jan 26, 2023 14:05:52 GMT
Back at it…Scratchplate template pretty much made. Any guesses on material?
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Post by pete1951 on Jan 26, 2023 19:55:04 GMT
Seem a shame to cover the wood, but in keeping with Supro designs I would use MoT rather than Black/White/Black acrylic Pete
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Post by Dolando on Jan 26, 2023 20:21:23 GMT
I know what you mean. Luckily the back has a some lovely grain. Haha
I’m going more earthy, so I’m going transparent tortoise, but with a solid backing so you can’t see pots etc.
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Post by Michael Messer on Jan 26, 2023 20:43:37 GMT
This is the type of material used by National on solid bodied guitars. 1957 model 1133 Shine On Michael
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Post by pete1951 on Jan 26, 2023 21:26:44 GMT
Forgot to consider how well the colour of the pickup cover goes with the scratchplate? I guess it need to be a good match or a complete contrast. Pete
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Post by Dolando on Jan 27, 2023 10:14:03 GMT
Forgot to consider how well the colour of the pickup cover goes with the scratchplate? I guess it need to be a good match or a complete contrast. Pete Its a firebird pickup, so pretty neutral really so will work with most things, except maybe a metal guard.
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