DIY Planar magnetic Hybride

[JAMESBOS]

Another 45 meters bites the dust,easy. Will fix magnets to base today then start on the epsilon clone diaphragm tomorrow, Should have the pair running by Monday.Can't wait for the explosive sound!*&%^. Then I will probably do all my rebuilds with the new diaphragm. No peace for the wicked.

[JAMESBOS]

I must emphasize how important it is to use the epsilon layout to get the highest sensitivity with the lowest magnet count. You don't even have to use neos which are way overpriced at the moment. I built a epsilon layout using ferrites which was as sensitive as one of my old designs same size using neos. Anyway cheerio going to finish the other one of the pair.

[JAMESBOS]

The first picture shows the magnets in place, this uses 24 columns of ferrite magnets. 2nd shows diaphragm ready for foil. 3rd shows another 45 meters of foil cut in half with scissors, took about 1.5 hours. 4th & 5th shows the holographic pair I am using at this time! 6th the layout at the bottom. 7th In position for foil placement. Which I will do tomorrow.This is another epsilon layout with different magnets and design, ready to compare with other ones I have built previously. I should get a grip of my records of my different designs!!! My memory is not what it was and after I have covered the designs. I can't see the details. Still always have been dis_organised.

[JAMESBOS]

I use 3mm tape now so I don't have to cut anymore tape in half thank god. Am still learning even after 20 years or more experience, still building different layouts designs re-thoughts. I must get my act together and be better at writing everything down and keeping track of the different impedance when comparing designs my major failing at this point in time. Also the magnet layout and number can be a problem as well. Which I have just discovered. Surprises can suddenly appear and you have to go back to the drawing board, so to speak. What you expect to happen is a shock when the opposite occurs.This I have experienced this week. So I am still learning and require a lot more diligence when measuring etc. YOU LIVE AND LEARN, SLOWLY.

[tyu]

JAMESBOS
I have a hard time geting why you have to use so miney mag....look at the Stages bass panels...i run these with 50tube amp...get great output...lot less mag...right....Can you say?....thanks for all your work an post an pic..

[jay53]

Originally Posted by JAMESBOS

I must emphasize how important it is to use the epsilon layout to get the highest sensitivity with the lowest magnet count. You don't even have to use neos which are way overpriced at the moment. I built a epsilon layout using ferrites which was as sensitive as one of my old designs same size using neos. Anyway cheerio going to finish the other one of the pair.

Hi JAMESBOS,

After contemplating between Electrostatic and Magnetostatic, I have decided to attempt the later. I am in the process of determining the design and layout. I see that you seem to emphasize on" Epsilon Layout " . What exactly is it ? I can't fathom that from what you have posted.

Thanks in advance.

Jay53

[JAMESBOS]

Am in the process of building new design which uses less magnets than my last one, keep your fingers crossed! Have had to rethink some of my designs, it's far more complicated than I originally thought! You live and learn even after 20 years of work.

[Iamimdoc]

Was thinking about building ESL's but finding transformers is difficult and my electronics knowledge is suspect. Thus, magnetostatic might have a higher chance of success for me.

Would appreciate a little more help if you all would be so kind

1) I presume the mylar is tensioned. If so, is the technique similar to the ESL builder pages (ie bike inner tube or hair dryer)?

2) If # 1 is yes-> the signal carrying tape is applied AFTER tensioning - YES?

3) Is the signal carrying tape run "between the column of magnets" (and not down the center of the magnet's longitudinal axis)? Or does it matter?

4) For feasability studies, what sort of "garbage bin liners" can be used (in USA). (This stuff seems awfully heavy with lots of inertia)

Thanks

[JAMESBOS]

Originally Posted by Iamimdoc

Was thinking about building ESL's but finding transformers is difficult and my electronics knowledge is suspect. Thus, magnetostatic might have a higher chance of success for me.

Would appreciate a little more help if you all would be so kind

1) I presume the mylar is tensioned. If so, is the technique similar to the ESL builder pages (ie bike inner tube or hair dryer)?

2) If # 1 is yes-> the signal carrying tape is applied AFTER tensioning - YES?

3) Is the signal carrying tape run "between the column of magnets" (and not down the center of the magnet's longitudinal axis)? Or does it matter?

4) For feasability studies, what sort of "garbage bin liners" can be used (in USA). (This stuff seems awfully heavy with lots of inertia)

Thanks

1)I tension my mylar by hand, it is held in place by wood round the cutout.
2) The tape is put in position before you tension the diaphragm.
3) Between the column of magnets, the epsilon design puts them in the centre as well, but I have stopped using the epsilon layout after building testing and comparing them against the normal layout.
4) I no longer use rubbish bags, like when I first started 20 years ago, too heavy. Instead I use 12um mylar.

[tyu]

You ARE doing great work...thanks for all your info here on ribbons...I have All my fingers crossed.....Good job.....
Have had minny apogees an just got a nother pr of the Stages..Sound is so real makes me cry...not any thing i have had is so eze to drive an sound so good... JUst step a way from Apogee ribbons for 10years...then come back....to real sweet tube sound....an the real base....great sound.....
ESL are vary good an i well never give them up.... but it hot here with 80% hum...not good for ESLs pain in my but....goodluck