418P capacitors???

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erwin_ve
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Re: 418P capacitors???

Post by erwin_ve »

Colossal wrote:
martin manning wrote:An example of... well it's really an example of several things. You'll lke this, I think, Max! http://www.npr.org/blogs/deceptivecaden ... -the-strad

Loved the Chapman stick, BTW!
Martin,

Great article! Of the two clips, I picked the Stradivari which I found interesting. That said, I like new guitars, metal film resistors, and polypropylene :lol:
You certainly have to read this:
http://www.violinist.com/blog/laurie/20121/13039/
Almost like reading TGP :P
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M Fowler
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Re: 418P capacitors???

Post by M Fowler »

I was happy to have picked the second violin as being the Strad with my poor ears :)

I see from the blog the debate continues regarding how the test was conducted.

Mark
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martin manning
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Re: 418P capacitors???

Post by martin manning »

M Fowler wrote:I see from the blog the debate continues regarding how the test was conducted.
Should we be at all surprised? ;^)

I was lucky enough to sit in the front row at a recent Joshua Bell concert, at a small venue, where he played his Strad. I was about 10-15 feet away. Much of the sound is in his hands for sure, but I was impressed by the sound of the violin, especially so at the lowest volumes.
erwin_ve wrote:You certainly have to read this:
http://www.violinist.com/blog/laurie/20121/13039/
Almost like reading TGP :P
Indeed!
Max
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Re: 418P capacitors???

Post by Max »

If we turn our heads forward "...We can make history as well..."

source: http://www.violinist.com/blog/laurie/20121/13039/

Cheers,

Max
groovtubin
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polyester

Post by groovtubin »

THE... reason polyester sounds so good is that they are ELVIS APPROVED!!

jim@Omegaamps.com
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Structo
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Re: 418P capacitors???

Post by Structo »

Yeah if you go by the numbers polyester isn't that great of a dielectric compared to more modern materials like polypropylene, which is not as temperature and frequency dependent as polyester.
Polypropylene does not absorb moisture and change capacitance value as does polyester.

But a lot of us like the way they sound compared to other caps.

Not sure what it is but I built a small amp with polyprops and didn't really care for it.
Kind of shrill.
Tom

Don't let that smoke out!
Max
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Re: 418P capacitors???

Post by Max »

Structo wrote:Not sure what it is
Tom, IMO exactly this is the problem. As long as we don't fully understand on a scientific level for precisely what physical and psychophysical reasons an amp is perceived by musicians and listeners as having a certain kind of timbre and feel, we are still in the depths of the middle ages of ampbuilding and have to pray that our holy parts aren't taken away from us: http://www.youtube.com/watch?v=nzrc5Zbclpg

Cheers,

Max
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erwin_ve
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Re: 418P capacitors???

Post by erwin_ve »

my medieval guts are telling me there are plenty of good caps around. Just try them. Wima mk4, Cornell Dubilier Cde. I love them.
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martin manning
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Re: 418P capacitors???

Post by martin manning »

I think before I start my next one I'm going to kill a chicken and examine it's guts for signs telling me which caps to buy ;^)
Max
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Re: 418P capacitors???

Post by Max »

martin manning wrote:I think before I start my next one I'm going to kill a chicken and examine it's guts for signs telling me which caps to buy ;^)
Just tried this. The signs told me to hunt supernatural caps.

picture source: http://www.carlossantanahats.com/hats/supernatural.htm

Have fun with whatever cap you like best! :D

A nice weekend to all here,

Max
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erwin_ve
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Re: 418P capacitors???

Post by erwin_ve »

martin manning wrote:I think before I start my next one I'm going to kill a chicken and examine it's guts for signs telling me which caps to buy ;^)
:D :lol: :D
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NickC
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Re: 418P capacitors???

Post by NickC »

martin manning wrote:I think before I start my next one I'm going to kill a chicken and examine it's guts for signs telling me which caps to buy ;^)
:lol:


I don't mean to be pedantic about it ..... but seeing as how were talking the "supernatural" here .... one should use the word "entrails" instead of "guts". The authoritative books on arcane occult practices are very specific about using "entrails". :wink:
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alvarezh
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Re: 418P capacitors???

Post by alvarezh »

Yes, those caps are guaranteed to work great with Mesa Boogies, Dumbles and Bludotones!

:lol:

Cheers!
Horacio

Play in tune and B#!
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renshen1957
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Re: 418P capacitors???

Post by renshen1957 »

Max wrote:
So what?

There have been days when musicians have been the driving force behind the development of new instruments with new and fresh voices - because they have been eager to create fresh music with these fresh voices. When the piano was borne AFAIK only few whined "Boohooo, these don't sound like a harpsichord".
Cheers,

Max
Hi Max,

Some thoughts on the generalizations in your comments,

I wouldn't say musicians have been the driving force for musical instrument development, directly Changes in venue size have more influence, and the prevailing taste in music likewise being a contributing factor. Sometimes instrument technology changes which some composers take advantage in their music.

When the Shadows needed more powerful amps to play to larger audiences, the AC30 was born. The AC30 lead to the AC50 because the Beatles had to compete with the Jet engine DB of their audience. The Beatles played Stadiums ergo, AC100. Ritchey Blackmore played a 250W Marshall fueled by UL KT88 power amp. The Stones adopted the Ampeg SVT 400 to play to their even larger crowds. The audience and the venues increased size drove evolution of the Amp.

When the electric guitar and amplifier was born the reason was to increase its loudness to play larger halls or to compete in progressively louder bands. Country players (Steel Guitar players in the beginning and later E-guitars) adopted some form of amplification to play to larger audiences (consequently more money from the house).

In the case of Steel Guitar players, they now have Solid State 1 kilowatt amps, in this case to have the power to play loud and clean without distortion. This would be an example of a musician have an effect on design.

The Piano was invented by Cristofori in Italy circa 1698 and no musician cried as to the sound.

At this time only a few wealthy individuals (the Medici family who employed Cristofori) could afford the instrument, even some of the Cristofori Pianos among the aristocracy in Spain were converted back into harpsichords. The first sheet music published to mention the Piano by name is 1771, long after Cristofori was dead. The Harpsichord was the instrument used by the conductor in the orchestra even into the time of Haydn and Mozart.

It wasn't until music styles radically changed and the size of the halls increased in that the piano came into ascendency nearly 100 years+ after the invention which finally pushed the harpsichord into hiatus. The piano didn't become universally supreme keyboard instrument until after the rise of middle class prosperity in the 19th century when the piano became a status symbol of affluence. Previous to this time primarily the wealthy could afford pianos.

The Strad Violins survived for the reasons of tone, sound projection and the ability to retain these qualities when modified for greater volume. Of the antique Strads, only one (possibly another) have the original neck, shorter fingerboard, bridge, etc untouched from the masters hands. Jacob Stainer's instruments were more highly regarded by contemporary 18th century violin players compared to the Strad but did not respond to modification. The modern bow and Violin became popular over of its mellower Baroque brethren as music became louder in bigger halls and the style of playing changed.

The early Baroque Guitar as a 5 string double course (10 string guitar) co-existed with the Lute but as to solo and ensemble literature the Lute was the the more popular of the two. The Lute and Baroque guitar likewise were eclipsed into oblivion by the Classical Guitar (circa) 1780 and basically for the same reason change in musical taste and the requirement of louder instrument with better presence (sound projection).

Thank a long dead ex-natural (valveless) trumpet player who split his lip and took up the lute to support himself for the invention of the tuning fork. This lead to the later development of the electronic tuner.

As to Tube amps solid state, caps of all manner of construction, etc,

Guitar amps and musical markets do not drive the major players in the cap industry.

The manufactures produce for their major customers/consumers: power supplies, computer monitors, and more, just look up the suggested uses on data sheets.

If a cap can be used for audio, great, another selling point, but the current stereo market caters to transistor powered amps for computer sound systems, Ipod players, Surround Sound home Theater systems for these reasons: size, lower cost/higher profit, and building to a price point and not for sonic reasons.

When HAD used Polyester Orange drops...too much written, the main customers were HV power supplies. The Polypropylene caps are a later technical improvement, again for power supplies. No one invented the PP cap to deal with the distortion that Polyester imparts on the sound signal.

I use PP caps around the PI in amps with NFB for their speed and accuracy,, but for AC signals I find them harsher. I could compensate for this, but I continue to use polyester, paper in oil, polyester in oil, wax paper and foil so I don't have to fiddle with parameters to make PP caps to sound like amps with polyester caps which is what most musicians like.

There is a local company that produces Paper and foil caps, but not for the Musical Instruments or Hi-Fi's. Of course that market was abandoned log ago by Sprague/Vishay etc.

Quote, "So (IMO) let's hope, that the creative intelligence of us humans - or at least the one of some of us that can teach and help others - will be sufficient to find out how to build great guitars without brazilian rosewood, and great guitar amps without 418P caps and even without tubes at all. "

There is so much variance in wood (being organic), and as no to trees are similar sonically, the wood produced from them is as unique as finger prints.

Guitars have been made from Aluminum, Carbon Fiber, etc and the although these materials are superior to wood in producing consistent results, in the last analysis the end users (guitarists) usually votes with his wallet as to the cheapest material which is wood.

The musical amplifier industry has been attempting to get rid of tubes since the mid 1960's when Standel and Fender went into the market to produce artists amps (and not cheap beginner amps). Maybe it was too much too soon for Solid State, but it's 60 years later and tubes haven't gone the way of the Dodo. One reason, the Hi-Fi market still supports tubes (I've said this a lot). Another reason is the "creative intelligence of us humans" hasn't been able to produce a solid state or a digital amp that can do what a tube does naturally/inherently for a price point.

The 6L6 tube is still being produced nearly 70 years after its invention. The 12AX7 has been around for 65+. Both have outlasted many generations of discrete transistors and ICs (now obsolete) that were supposed to replace them.

I have seen some designs for Single End Class A transistor power amps that come very close to a tube as to distortion characteristics when pushed, but these won't be popular as they are 1) Low power 2) More Expensive 3) for only a little more money you can buy a tube amp that's more powerful.

Sorry for the length and Best Regards,

Steve
Max
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Re: 418P capacitors???

Post by Max »

Steve, I didn't write invention but development, and I didn't write performers but musicians. And to initiate and fuel development, IMO new instruments have to be implemented by musicians into the daily life of the world of music. And this implemantation only takes place if musicians (performers, composers, conductors, etc.) gladly welcome these new tools because they are different from what they are used to - instead of complaining about this.

Cheers,

Max
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