Good advices for a newbie (threading tools lathe)

[C-Bag]

Nope, I have always used all 4 fingers especially my pinky. I was into Joe Pass chord melody style jazz guitar before I got bit by mandolin. So it was natural to use all 4 fingers, what wasn't natrural was long linear stretches that the mandolin takes. All the bluegrass mandolin players I know use all 4 fingers because you can't do Monroe style rhythm chop chords with just two fingers as they would ring and like Mr Bill said "that ain't no part a nothin".

[rendoman]

Hi all!
I'm back!
I'm trying to do an experiment with old 813 tube.

Few words about, old circuit tuned for last plasma tweeter is completely out of focus, the circuit is running, but very bad. Flame is tiny, and the circuit draws few current, but it's normal. Volume is not so high, but the quality of sound at first listening is always impressive like my last prototype. A very good thing: There are no troubles about noise.

[rendoman]

Hi all
New update, I changed lot of parts of circuit, in order to have more efficiency, spl and distortion, I'm in the right way.
Tweeter perform well from 300hz to 20khz now, lot of work to do to reach perfection!

I will build soon a coiler, I need to build special transformers for audio gear.
I also built a very nice electrostatic headphone

[PJs]

I applaud your tenacity with this project and glad you are still pursuing it!

PJ

[rendoman]

Thank you PJ!
That's a long project unluckily
It's not like a normal amplifier, more or less a matter of a couple of resistor to achive the result, this plasma is really a beast.
I'm glad there are encouraging results, I'm a bit scared at the same time about the horn size for an ultimate version, 300hz tractrix horn is more or less half meter wide not possibile to made with my lathe, I'll have to make composite or cast... difficult choices!

That's the headset I built, electrostatic driver like japanese Stax units, sound result is Amazing

https://www.facebook.com/stefano.ran...4376382&type=3

[PJs]

Yep R&D takes time and some head scratching. Seems to me on the Horn you could size it for 1/4-1/2 wave and get reasonable results??

Nice job on the Electrostatics and saved yourself $4k. I about fell out of my chair laughing at the Squirrel video!!! Truly Hilarious and the goofy Dogs a hoot!!

Till Then, PJ

[emikeo]

Thanks rendoman. Learn lots of new thing from your post. Moreover, You are continuing this thread from last 3 years! Amazing! Some of this thread posts have useful information.

[rendoman]

Thank you!
The plasma is still in development, even if I'm building an amplifier for my electrostatic headphone, I think I will close the plasma in the next winter , I hope!