John Curl's Blowtorch preamplifier part II

[Steve Eddy]

Regarding subjectivist vs objectivist arguments...

There's no such thing.

The arguments are between pseudo-objectivists and objectivists. And to be honest, it bothers me that it always gets framed as "subjectivist vs. objectivist."

se

 

[ThorstenL]

Hi,

It seems to me that if you know something but you can't say (e.g. because of an NDA) then the wise thing is to do both of the following:
1. don't say what you know
2. don't say that you know something that you can't say

You may be right.

I think I will from now on constrain myself to attacking ideas I dislike and refuse to answer questions about anything I may know anything about, but where there may be conceivably a small area that falls under confidentiality.

I think I should recommend the course of action to any others that have industry ties and associations.

At least this way you will never know what you don't know and will never be tempted to consider it or experiment on it.

Wilful ignorance must be bliss.

Ciao T

PS, if it had not been for people like John and Charles that occasionally threw a small concept or idea my way, I would not only not know what I do now, I would have never known that I do not know.

So I for one am thankful to all that said what they could and did not say what they could not, instead of saying nothing.

 

[DF96]

Someone might still stumble on it by accident, but that is OK. When the right time for an idea has come, it often seems to be found by several people quite independently.

 

[SY]

JC, seriously, check out Densalloy. Very machinable, it would make a great case if you're going for mass-loading.

 

[ThorstenL]

Someone might still stumble on it by accident, but that is OK. When the right time for an idea has come, it often seems to be found by several people quite independently.

YouTube - She's a witch!

 

[scott wurcer]

What do you have in mind? Some magnetic levitation?

se

Yes, got some pinched fingers from the magnets too. I was wondering also about a maglev tonearm, but the cart might complain.

 

[auplater]

tungsten alloys a candidate??

JC, seriously, check out Densalloy. Very machinable, it would make a great case if you're going for mass-loading.

http://www.atifirthsterling.com/downloads/51025_ATI_Corp_Bro.pdf

hoping someone might notice this material... used it for several DOD projects...

John L.

 

[john curl]

Magnetic?

 

[SY]

No, it's tungsten based.

 

[john curl]

Sort of magnetic?

 

[auplater]

here's a source (it's called the internet) ... might be of some value

Magnetic Properties of Solids

sorry... gotta run to buy 500 shares of CAT... gonna double in 3 years

 

[john curl]

Just so we do not have a misunderstanding, this material is usually an ALLOY with iron or nickel. This makes the normal stuff subject to magnetism. This is bad, where I am coming from. IF I wanted more mass, I would go to copper, or better, silver. If I wanted better damping, I would look elsewhere.
Of course, cost, fit and finish capability, and other factors need to be considered.

 

[SY]

SDD185 is not even on the charts as far as magnetism.

 

[jlsem]

A more practical choice would be C99750. It's easily cast, relatively inexpensive, it machines well and it has a very high specific damping factor. It's only half as dense as Densalloy but the cost per pound is much lower and because it can be cast there will be far less waste.

MatWeb - The Online Materials Information Resource

John

 

[SY]

If the cost is lower, it's not as good. Remember the audience!

 

[jlsem]

Anyone who has looked inside of a high-end piece of equipment can tell you that lower cost is a prime consideration.

John

 

[SY]

Take a look at the Blowtorch photo. Nothing cheap in there.

 

[john curl]

Cheap as we could make it.

 

[john curl]

No, SY, I sold you all my cheap volume controls.

 

[SY]

And they worked fine! Alps Black Beauties and a couple of ten turn attenuators.