Part 4 "FAST" electrostatic tweeter hear the difference between transformers

[@adam207321]

That sounds a lot better than what I expected. A WHOLE LOT BETTER. Im planning on building electrostatic tweeters for my vintage radio that had them but they are missing and the original ones are these days all toast because of either corrosion or material decay...so I want to make a lot better ones than what they had in the 1960s :) Actually I will have to go with a high voltage bias and I can obtain drive voltage for the tweeters from the primary side of the output transformer of the final vacuum tube amp stage. Gives at highest volume 300V signal

[@joppepeelen]

most likely they used single ended electrostatics. one foil and one stator. not ideal. if you can, replace it with push pull :)

[@adam207321]

@@joppepeelen yep it was a single ended electrostat. The membrane was what i could tell from the pictures glued to a soft insulator and after years and years of service the foil has either been stretched, or corroded away or the glue holding the foil in place let the tension droop and the stator touched the membrane. I have a read a few papers on how to make electrostats but everybody seems to be obsessed with full range while I just need a powerfull enough tweeter.

[@Toid]

Dude that sounds great!

[@joppepeelen]

thanks m8, not exactly usable but well i hope people get an idea how it works and put together.

[@LucianoVeneziano]

Hi, your movies are always very informative. For the high voltage, I bought the blue box but could you send me the diagram that also includes the diodes? Thanks again.

[@jeffreyyin]

what is the blue box called?

[@joppepeelen]

Called an cold cathode inverter . Like the ones used in older game pc a tube like lamp. 12 dc volt in or less and between 100-600 ac out

[@drrobotnik5376]

I wonder if you can protect the system from overloads by just adding a bottlenecking capacitor - so it cuts out when the bottlenecking capacitor fills up?? just an idea, im not sure how to do it tho.

[@drrobotnik5376]

No! I think you put a spark gap that is slightly smaller than the d distance on the speaker membrane! then if it ever over volts, it wastes down the spark gap instead of blowing the speaker!

[@joppepeelen]

@@drrobotnik5376 i think they did somerhing similair in de esl63. But i think it shorted the audio to a resistor to protect the amp

[@drrobotnik5376]

@@joppepeelen you can add resistance to the spark, but it has to be BEFORE the junction NOT after, because I know about plumbin' electricity, raw junctions is my specialty. (u have to keep the spark end bare.)

[@Methosu]

it can't be just connected as normal speaker?

[@joppepeelen]

no and Electrostatic speaker need all this junk. a planar magnetic does not. i make a few of those to. just to different types of speakers

[@Methosu]

@@joppepeelen what is the easiest way to make preamp for electrostatic speaker?

[@LucianoVeneziano]

Hello. There are commercially available non-expensive transformers that I can use as a step-up. Thank you!

[@bollardspeaker26secondchan7]

Anyone recognized the song? cuz kinda like it, and does anyone here knows the artist Room Eleven, and just a question does ribbon and planar share the same material used in the diaphragm?

[@joppepeelen]

the song is - all the kings daughters - lonesome man. you can buy the single directly from them. and it is on youtube. The speaker here is a electrostatic speaker. A ribbon uses either pure aluminium or alumnium on mylar. MAgnetic planar is a conductor (usually alu) on stretched mylar

[@joppepeelen]

Ans yes i know room eleven. Try janne shra she has solo albums to love her

[@Gersberms]

Those little transformers have a terrible resonance. Does that have to do with the poor magnetic properties of the iron core?

[@joppepeelen]

well could wel be , they are overal terible. the cheapest teroid works better. to bad i cant find any that has 230-3volt that would be great :) 6 is the smallest voltage i could find but are still 25 euro a piece.. i talked with final (the owner) once and they bought there for around 7.50 -10 euro..... its insane. power of numbers i guess and good contacts

[@Gersberms]

@@joppepeelen You could wind your own 3 volt winding on top of the 6 volt winding. Just use half as many turns! And use wire with the right resistance or you might short out the transformer. I've heard toroids pull a high current when they produce their magnetic field.

[@joppepeelen]

i know, i did actually :) i wound transformers for a while for someone else. but they where C shaped. and only the materials alone are a bit more then 10 euro :) more like 75 :) so its a waste of time for me at least. i had the machine on loan and gave it back.. although i had the change to buy it for only 150.... at that time i did not have the money.. i wish i did buy it. it was a loverly al mechanical machine. not suited for teroids though. it was a Mica Fill. from the 60's or something. as a thing of art it was worth the 150 i think :)

[@przemyslawmajewski2754]

When you connect two transformers like that you get dc bias on those, it makes it saturate cores wery easy, it will lose linearity. With middle tap on transformer dc bias will cancel itself.

[@joppepeelen]

I think a DC blocking cap would solve any of that :0 no mather witch kind you use

[@przemyslawmajewski2754]

@@joppepeelen yes you are right

[@jeffreyyin]

I tried to make my own but it don't have any sound, maybe is do to low voltage to the film

[@joppepeelen]

Hmm well could be many reasons. The high voltage the coating or you transformer or the way you hooked them up.

[@drrobotnik5376]

you have to get the circuit right, doesnt matter if you can just make the speaker!! :)

[@LucianoVeneziano]

What is model of Amplimo?

[@joppepeelen]

Luciano Veneziano not sure 25va 2x6 volt mains 230. Used in r3verese. They are not ideal either since the dont reach above 18khz somehow. Some onther cheap brands where reported doing fine up to 20khz and beyond like antec and vxd toroids

[@sjaakhosters419]

Leuk project om te volgen, maar ik blijf bij mijn Solosound ESL.

[@joppepeelen]

Hihi dit is ook geen echt project, meer om te lateb zien hoe het werkt. Ik heb ook nog wel een video over de solosound panelen oo mijn kanaal :)

[@daniespi23]

¿can I do this with a transformer of 60 hz?

[@joppepeelen]

yes you can. you do need 2 , the antec 6 volt teroids are suitable. both secondary in series gives 1;80~ (the former primaries become sec you use them backwards)

[@camelazo]

nice transformer, nanocrystalline core i guess.

[@joppepeelen]

hehe :) nothing fancy except being a C core. but no real expensive materials :) it does the job

[@MarcelOoms]

The differences are quite obvious.

[@joppepeelen]

yep i think so to, i would go for the big transformer :) the other one sounds ... distorted nose like character :) well they where only few euro compared to original few hundred for the other one >? also not worth that amount of money to be honest

[@MarcelOoms]

Maybe the toroids are a good compromise?