Full range planar speaker using neo magnets

[JAMESBOS]

ditto,the blue material acts as a dust cover.!!

[JAMESBOS]

Still learning as I go along, very frustrating at times, especially when the same rebuild, does not have the same effect with a different speaker. magnets ,sizes, neos, ferrites you have to learn for each one by building it. Very time consuming, and can be very frustrating!!!£*)^%$

[JAMESBOS]

some more not finished yet a few more learned truths about full range planars to come next. As I have said I am still learning more as I go along.

[JAMESBOS]

no. 1 & 2 are the same layout, using normal foil positioning. No. 2 uses a different type of plastic magnet same thickness and width. I had to cut the No. 2 plastic , by hand. It is 6 db more sensitive than No. 1
No. 3 is an improvement using the epsilon layout with an extra foil on the magnets, which are 3 mm thick neos. This was made possible by using the 3 mm tape instead of the 4.5 mm tape, I used previously. No. 4 is a 60 x 40 mm design using 6 mm thick neos, 12.7 mm wide. The original design was the normal layout, but with the new 3 mm tape, I reverted back to the epsilon layout, using the extra foil, which is a good improvement on the sensitivity. As I have said before the only way to improve things is to build the new layouts, it's the only way. All the new ones have to be built to compare with the old ones. It doesn't always work, but that is called progress. All the theorizing in the world cannot beat the actuality of building the dammed thing.

[geraldfryjr]

" All the theorizing in the world cannot beat the actuality of building the dammed thing."

Ain't That the Truth!!!!

Keep on DIY'ing!!!!



Jer

[gootee]

I mostly disagree with both of you, on that one. One of the main reasons engineering exists is so we can KNOW if and how something is going to work, BEFORE we build it.

And that can definitely beat (even just on cost, alone) building lots of them that don't work well-enough.

Of course, engineers sometimes decide to build and test rather than just calculate, if they have calculated that it's the best way, in that particular case.

[JAMESBOS]

If you can calculate,you can if you can't calculate like me you have to build. Anyway there are so many different parameters some known and some not known, which makes it almost impossible to calculate. Unless of course you are a genius, which I am not. I would rather build different designs than try to work out something which is impossible with all the known and unknown parameters of each design, as there are too many unknown factors.Especially if you design off the top of your head like I do. You live and learn, hopefully most of the time, which is the fun part when it works to your satisfaction. Perhaps I am too easily satisfied in your eyes!!

[JAMESBOS]

Anyway my pics speak for themselves, which is the fun part and actually to build something that works without any calculations is the real DIY experience. It also keeps me occupied and my old brain active, what's left of it anyway!!

[JAMESBOS]

no. 1 Epsilon layout.
no. 2 Large one uses 6 mm ferrites 40 x 18 mm.
no. 3 Small one uses 50 x 12.7 x 3 mm neos.
no. 4 Blue one uses 50 x 12.7 x 3 mm neos.
no. 5 Uses 50 x 18 x 10 mm ferrites.
no. 6 Uses 25 x 6 x 2 mm neos. A4 size.
no. 7 & 8 Use 50 x 12.7 x 6 mm neos. These are being driven by SE Valve amp using EL 38 output tubes with 6J5GT input tubes and CV378 rectifier in my sun room. Plenty of sensitivity with the design using the epsilon layout with no gaps between the magnets.

[kuribo]

You seem to be a serial planar builder. Is it that you are never satisfied or simply addicted to building them? Perhaps you should start a company...