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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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first post... but I recognize quite a few friends here.. so, my straight horns... I like them very much.. I built mine similar in style to what Greg B linked, but obviously much smaller.. mine are just under eight feet long (length of a sheet&nb...
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Hi Paul,The net gauge for one cable of the 140 strands of #40 stuff is #15 AWG, as far as circular mils of area vs current induced heating goes. The surface area is some 13 times that of a solid #15 gauge copper wire. A minimum of 10 times the surfac...
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[quote user="Paul S"]First, I just have to ask: What are the odds that the same AA guy I just referred to obliquely in my previous post turns up immediately thereafter?[/quote]pretty good since he's the only guy who talks about them?[quote ...
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eyop fellas,Romy wrote: "Here we go! Not we are taking!!! I would not need the S2 tweeter and what it dose now in 400Hz horn is perfectly enough. I would go only for the midbass S2. Something with 6” cellulose diaphragm, low to medium compressi...
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actually I agree with Romy, to a degree.... If the amplifier is a push pull device, using my output and input splitter devices of course, then an interstage transformer is a much better choice than rc coupling. Using transformers designed to the crit...
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[quote user="cv"] Note also the correlation between MC stepup sonics and size - I gather the Expressive Tech units are on massive cores...[/quote]
Nope, they are not. The Expressive MC transformers (the actulal transformers) are very smal...
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[quote user="cv"]The point of the field coil is to saturate the piss out of the magnetic circuit so that the coil flux does not modulate the motor. Romy, I suspect that your experience of them may be based on an older drivers where saturation was not...
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I'm probably revealing my ignorance by even asking this, but I'm
curious to know if a field coil ribbon tweeter could be practical. It
occurs to me that if one could be made, it would be a lot safer since
it wouldn't be a black hole for magnetic o...
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Those who flow what is going on with my 6-Ch Milq know that for sniggle driver stage I this revision I went what for non-electrolytic capacitors. I use a mandatory for me input choke with 200uF on PS side and then 100R and 100uF on the amps side to g...
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[quote user="cv"] But the real reason for my post is to ask:I was thinking about the results you reported and am really scratching my head as to why the FC S2 should sound honky, given that its acoustic geometry is completely unchanged. Any idea...
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[quote user="cv"] Or build your own outer magnetic circuit as you are saying, retaining the S2 diaphragm, phase plug, pole pieces and throat.... [/quote]
If you read the thread form beginning then you will see that it was my original ultimate intent...
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[quote user="hagtech"]Yes, steel chassis can be both good and bad. It likes to conduct magnetic fields, so you have to treat things appropriately. A little spacing under a choke can go a long way. Otherise you have a 120Hz motor.&nb...
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I do not know how my S2 driver will sound but I defiantly know that it will have the problem with temperature. Looking prematurely at the driver’s sound it looks like it produce the necessary magnetic force at 2A-2.3A, that heats a lot of this driver...
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I know that I ma a wacco, so extend patience while you read it.
I was cleaning my shelves and found a strong alnico magnet that left from my field-coil. Since the electromagnet driver project was over I was about to assemble the driver back and send...
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[quote user="hagtech"] Yes, steel chassis can be both good and bad. It likes to conduct magnetic fields, so you have to treat things appropriately. A little spacing under a choke can go a long way. Otherise you have a 120Hz motor.&n...
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[quote user="cv"] Well, the Cogent (Steve Schell and Rich Drysdale) boys are building just such a beast: field coil magnet, (possible) permendur polepieces for >2T, Fs 70Hz, throat - dunno, but at least 3" dia, reduced compression ratio relative t...
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OK, I split the thread: “Best of the HE2006!!!” there extracting the Cogent’s related posts into a separate thread….
[quote user="Paul S"] The big RCA field coil is the best thing about the Cogent system. It has great "promise", based on what ...
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The Other End of the Single End: Modern Horns Done With Flare An Interview With Dr. Bruce Edgarby Dave Glackin, printed in POSITIVE FEEDBACK. 1996
Dave Glackin interviewed Dr. Bruce Edgar in his home, prior to the 1996 WCES. A follow-up on the speak...
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We enter a complicated region as the lower driver we go the drivers could be used for different purposes and it is very hard to generalize. A 10-incher might be MF driver and LF driver. In my past I experimented with few MF 10-inchers, including some...
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Show Report PiS Festcomposed by Johan Dreyer
This show was held at the Rama Sebo convention centre in Freetown on April 30 and May 1.Unfortunately my kids played with my camera and destroyed the photos.Highlights were:JBL announced that they were s...
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[quote user="Jeffrey Jackson"] so, my straight horns... I like them very much.. I built mine similar in style to what Greg B linked, but obviously much smaller.. mine are just under eight feet long (length of a sheet of plywood) and have a mouth roug...
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[quote user="rdrysdale"]Our bass driver has a 12v field coil motor, it developes just over 20 kilogauss flux density using a low carbon steel pole piece. The exit diameter is 4 inches at the moment. The diaphragm is 6 inches in diameter and made of a...
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Thanks for your comments Romy.
You should like this bit of news... I forgot to mention, these will be round-section horns...
And yes, they will be very heavy... Made from a metal armature and very thick, natural (hemp) fiber-reinforced, plaster...
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[quote user="rdrysdale"] I mean that with a horn loaded compression driver, a strong motor, and a very light diaphragm, the attack and transients are more life like. Because the diaphragm can more precisely follow the recorded signal, the reproductio...
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[quote user="jweiss"] It was good to finally meet you at CES at the Cogent Room. I guess that you really found Steve and Rich's drivers pretty interesting (you initially wanted to buy a pair of the midrange drivers, remember?) [/quote]
Hi, Jonathan....
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[quote user="drdna"] 1. This particular EdgarHorn is being sold to make way for a Cain & Cain speaker which is based initially on a single-driver type backloaded horn. To me this suggested that the seller was seeking the benefit...
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[quote user="jessie.dazzle"] After observing a pair of AK151s operating in free air, though only lightly driven, I just don't see how they can possibly generate so much pressure, as the cone barely moves! [/quote]
Why shout they move? One of the ide...
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thanks I have a few questions to ask if you do not mind:
1) Did you experiment with surface of the horns and a negative contribution of smooth surface to Sound?Smooth surface are fine don't waste my time on a trival matters.
...
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Hello again, Romy... friends.. cats...
I am sorry for my delinquence in replying... but the good news is that in the past weeks I have managed to get a beginning Goto system together... more on that in a minute..
first, basshorns... the bassh...
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After many hours and much efforts I have connected the new 6-channels Super Milq to my 6-channels Macondo, with omission of tweeters for now. I made some measurements and initial adjustments and then was trying to listen it briefly. I did not l...
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