Yes, most likely no difference in primary/secondary winding thickness.
That this bigger one is for signal is unlikely, isn't it?
NF Audio Übertrager Transformer Multi Anschlüsse | eBay
That this bigger one is for signal is unlikely, isn't it?
NF Audio Übertrager Transformer Multi Anschlüsse | eBay
I've done some practical experiments with "one turn" transformers, inspired by alexberg . Very good bandwidth and low distortion. One funny thing happened though. When I measured my speakers with HolmImpulse, all of a sudden, the speaker returned a inverted pulse!Oh, well...
that's what you need.
Your stripe resistance is 3 milliOhms.
100W yeilds 180A RMS.
Stripe voltage 0.54
Using decent amorph core with 3 sm sq cross section
like stacked 2xM512/522/612 from magnetec
all you need is 35 turns of magnet wire 1.6 mm in dia.
Transformer needs to be balun-like,
see attach. with single turn secondary shown.
Two cores with wound primary stay inside secondary.
Can easily be done from copper pipes, copper sheet and some soldering
Once every 3:rd or 4:th measurement, the measured impulse was inverted, and you could also see the phenomenon on the phase curves.
Could this phenomenon be a result from when you make a transformer winding with one turn, where the ends of the turn doesn't meet, the one turn winding
cannot be called a clockwise or anti clockwise turn?
Have I invented a new kind of binary random generator?
It might be HolmImpulse pulling my leg, so I shall do some further experiments and measure the signal directly from the transformer...
Attachments
Lots of information I got from this thread for building my own ribbon tweeter.
Just to share what I have done:
My custom build corrugator
The mini nickel perm-alloy EI transformer I bought from ebay, can't recalled the ratio but its around Sec : 5 turns and Pri : 70turns
Using Woofer Tester to make quick measurements
Embedding of the ribbon tweeter
Measurements
Just to share what I have done:
My custom build corrugator
The mini nickel perm-alloy EI transformer I bought from ebay, can't recalled the ratio but its around Sec : 5 turns and Pri : 70turns
Using Woofer Tester to make quick measurements
Embedding of the ribbon tweeter
Measurements
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The magnet structure is really nice, but that transformer is not going to do it. I made some of those around 15 years ago, and results are bad. See my previous post on making one with sheet copper and ferrite cores which is almost lossless. Also the wire from transformer to ribbon must be short and very large, like # 8 stranded. Current for those is huge. Over 30 amps at medium volume. I have more photo's of how to do it if needed.
Noted on the loss, using the calculator online the efficiency is about 87%. I'm quite ok with my current transformer, since I still can get around 90dB to 93dB performance. My other objective was also to have nickel perm-alloy transformer and has to be small so I can hide it inside the yoke.
I got it from ebay
http://www.ebay.com/itm/230646735924?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
I got it from ebay
http://www.ebay.com/itm/230646735924?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
If i am right you ribbon is prue Alumimum some say the best......................Apogee on my stages capton back ribbon for MT..... let the magnet stop at about a 1/2" obove the ribbon connection point .....cooling down point an no move ment.........then latter thay let the magnets go all the way down .... then added a suspensions point in the lower middel of the ribbon............go to the site some info
good luck
http://www.apogeespeakers.com/manuals/stage_midtweeter_replacement.pdf
good luck
http://www.apogeespeakers.com/manuals/stage_midtweeter_replacement.pdf
Maybe the copper near the connection could be tinned or gold plated.
Or, is the connection just getting loose - could it be soldered instead?
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Alu. has an oxide layer on it and this layer is highly insulating.
Have you tried scuffing up the Alu, at the connections as well.
As this may be a bit difficult to do depend on the thickness of your material you can also try removing the oxide layer with a weak solution of Sodium Hydroxide at the connection ends.
I have had similar issues before when using Alu window screen for for my ESL stators as well as connections to the diaphragm using Alu. tape.
So now I soak the screens in the solution (Etching) as this guaranties a positive connection to all of the wires in the mesh before I coat them using only a few wires for connections from the woven mesh.
This works good and I use good ole steel wool to scuff up the Alu. tape parts, these connections have now lasted for at least 10 years or so without any issues as tested.
I few of my panels would not even work at all at First try or just worked for a little while and intermittently , until I had removed the oxide layer and that was at very high voltages too!!!
FWIW
jer
Have you tried scuffing up the Alu, at the connections as well.
As this may be a bit difficult to do depend on the thickness of your material you can also try removing the oxide layer with a weak solution of Sodium Hydroxide at the connection ends.
I have had similar issues before when using Alu window screen for for my ESL stators as well as connections to the diaphragm using Alu. tape.
So now I soak the screens in the solution (Etching) as this guaranties a positive connection to all of the wires in the mesh before I coat them using only a few wires for connections from the woven mesh.
This works good and I use good ole steel wool to scuff up the Alu. tape parts, these connections have now lasted for at least 10 years or so without any issues as tested.
I few of my panels would not even work at all at First try or just worked for a little while and intermittently , until I had removed the oxide layer and that was at very high voltages too!!!
FWIW
jer
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