resistor comparison test - tantalum?

[Christer]

Originally posted by fdegrove
Hi,



Not just me but the entire audio industry I would think...

I made life a bit easier on myself and let A.J.van den Hul do the talking:

FUSION AND HYBRIDS

Cheers,

Yes, those theories I have read about before, although not
that particular article. However, as far as I could see there
was no mentioning of directedness in the article. In principle
the theory says that we get diodes at the metal-metal
boundaries. However, I see no reason whatsoever that these
diodes should all be directed the same way. To the contrary,
it seems most reasonable that they should statistically add up
to about the same number of diodes in each direction. We get
non-linearities, but there is no reason why these should differ
depending on the direction, at least not in a systematic way
s.t. we know beforehand which way the cable should be directed.

[UrSv]

I think I have read that the diode junction is directed in one direction as the conductor is pulled in a specific direction and then the "crystals" are oriented in one way. As for proving directionality I post the same link as usual (and now that I read it again it says the same thing). At least somebody claims it can be measured:

http://www.jenving.se/direct.htm

[Christer]

Originally posted by UrSv
I think I have read that the diode junction is directed in one direction as the conductor is pulled in a specific direction and then the "crystals" are oriented in one way. As for proving directionality I post the same link as usual (and now that I read it again it says the same thing). At least somebody claims it can be measured:

http://www.jenving.se/direct.htm

Interesting! I have heard something similar before, that it
should have something to do with the stretching, but it did
not discuss it on this level. OK, so let's accept the diodes do
get directed in the same way. Still, the signal is AC, so it seems
not guite to make sense anyway, does it? The non-linearities
might be different for positive and negative cycles, but so what?
We have both positive and negative cycles. Unless we go into
absolute phase issues, I still do not get it.

[fdegrove]

Hi,

Seems some people need scientific proof before they get of their scientific *** and do some tests on their own?

Blimey...

[Christer]

Originally posted by fdegrove
Hi,

Seems some people need scientific proof before they get of their scientific *** and do some tests on their own?

Blimey...

No, but I make a distinction between empirical data and
theoretical explanations. I think we all benefit from understanding
why component A sounds different from component B. If
component A costs $1000 and sounds better than component
B which costs $10 some will be rich enough not to care about
why A sounds better than B. However, if we can find the reason
for the difference, maybe we can make component C which
costs $20 and sounds at leasst as good as compoonent A.
Component C would be affordable for most people, but of course,
some of those who could afford component A would be less
happy since they are no longer a select group of people who
are the only ones who can afford the better sound quality.

[Damon Hill]

If there are directional non-linearities metal films, seems like the annealing process should neutralize them. Wirewound and bulk foil, too. Some circuits and applications require such high linearity that if this 'diode effect' is real, it would be a problem and the resistor manufacturers would be aware of it.

I consider bulk foils to be the best type, but I can only afford metal film and selected wirewounds. Devices that cost several dollars apiece, like Black Gate capacitors, have to be used very
sparingly on my tiny budget.

Consequently, I have to choose from 'low end' metal films, usually Dale or whatever the local parts shop has got. I lucked into a batch of .27 ohm IRC wirewounds at a surplus shop that I used in place of the Mills I had planned to use for the emitter resistors in my Leach upgrades.

By the way, Dale resistors all have magnetic end caps in my experience; I do find various metal film types such as Mepco-Electra may be non-magnetic, but I can't always be a purist.

[fdegrove]

Hi,

While I understand your reasoning,in audio, in order to advance the state of the art I often find myself to listen first and explain later.

If at all...an explanation can be found than we'll need to look at quantum physics.

Personnally,give me any piece of wire,let me burn it in for 24 hrs and it will be directive no matter what way I turn it before break in.

Lattices,the way the cable is drawn from the die are just wild guesses and if ever I find a document that explains it all from A to Z I'd be happy to present it.

In the mean time I notice one thing,the more we go up in the elements table the better the sound,i.e. Au sounds better than Ag,Cu and so on.
Alloys of siver and gold can sound amazingly good too...purity must have something to do with it,crystal lattice boundaries too.

Why? Dunno really...

[Christer]

Originally posted by fdegrove
Hi,

Personnally,give me any piece of wire,let me burn it in for 24 hrs and it will be directive no matter what way I turn it before break in.

That's interesting. Most claims I have heard are that cables
are directed by the manufacturing process, not that you
can change it.

[fdegrove]

Hi,

That's interesting. Most claims I have heard are that cables

Yep...and that's one reason why one shouldn't care about it that much.

Mind you,the directivity is still there...I put the topic to my younger brother,a nuclear scientist, and all he muttered was something about conditioning...he lost me on that one though.

Cheers,

[mrfeedback]

Originally posted by fdegrove
Hi,
Yep...and that's one reason why one shouldn't care about it that much.

Mind you,the directivity is still there...I put the topic to my younger brother,a nuclear scientist, and all he muttered was something about conditioning...he lost me on that one though.

Cheers,

I was told by a NP that the local fields 'lock' into the wire during forming operations.
Solder joints too.

Eric.