John Curl's Blowtorch preamplifier part II - Page 951 - diyAudio
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Old 5th February 2011, 07:36 PM   #9501
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Quote:
Originally Posted by john curl View Post
Soundminded, this is where you go astray. Jack could use a cheaper resistor, BUT it would not work as well for what he is doing, compared to what he is using.
Which begs the question - what IS he doing? And how, given the lack of ANY published data (you know, that stuff that arrives after rigorous testing and measurement...) from the manufacturer, is it possible to say that ANY specific component is included or rejected on the basis of its performance or specification?
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Old 5th February 2011, 07:51 PM   #9502
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Originally Posted by john curl View Post
I would also like to correct a problem with the LEADS used in the cheapest (still expensive) Bybee devices. For the cheapest Bybee devices, Jack uses 'COPPERWELD' a military specified type of lead, with a steel wire center and a copper tube on the outside. This gives MOST of the advantages of copper, and the strength of steel for military applications that might be exposed to heavy vibration. The reason Jack uses Copperweld is to be able to weld, rather than solder the leads to the resistor material. Jack also sells silver and gold leaded versions of the same product, that are normally used by more 'uptown' clients. They are plainly shown on his website.
Now PERSONALLY, I would prefer pure copper leads, but then it depends what they are connected to. For example, film resistors might be more easily connected without welding, such as using soldering. Then, copper is OK, and really better. In any case, Pacific resistor typically uses COPPERWELD to make their products, as they tend to make products for the military, according to their website.
In any case, the leads should not be called copper as is printed on Jack's website, or steel, but COPPERWELD, which mostly acts like a copper tube.
I guess then that the "uptown" devices use Pacific resistors (for welding) with a gold or silver plating on the leads.


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Old 5th February 2011, 07:57 PM   #9503
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No, the vast length of the leads are pure silver or gold leads and welded to the resistor, as close as possible. The gold leads have some silver added.
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Old 5th February 2011, 08:00 PM   #9504
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Originally Posted by john curl View Post
The part isn't on sale to YOU, Jan. It is not obsolete. Prove, or please refrain from making such strong statements.
YOU said it isn't for sale. Should I now go proof YOUR statements? You crack me up!

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Old 5th February 2011, 08:11 PM   #9505
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It isn't for sale to the public. You are the public, so you are excluded. It is a proprietary part, sold only to certain companies. Now, WHY it is a proprietary part is what makes it interesting, not whether YOU can buy it or not.
By the way, some of the resistors that I gave you have leads attracted by a magnet. Are they iron too?
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Old 5th February 2011, 08:22 PM   #9506
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No, the vast length of the leads are pure silver or gold leads and welded to the resistor, as close as possible. The gold leads have some silver added.
Oh, okay. Thanks for the clarification.


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Old 5th February 2011, 10:37 PM   #9507
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Originally Posted by john curl View Post
It isn't for sale to the public. You are the public, so you are excluded. It is a proprietary part, sold only to certain companies. Now, WHY it is a proprietary part is what makes it interesting, not whether YOU can buy it or not.
By the way, some of the resistors that I gave you have leads attracted by a magnet. Are they iron too?
If they are glass wrapped resistors then it is Kovar leads, all sorts of other leads are in use for various reasons by the manufacturer.

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Old 5th February 2011, 10:56 PM   #9508
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Originally Posted by Pano View Post
Maybe in boat building or cooking.
Restaurant business : markup factor of 5-6
Yachts, 60% material + 40% labor guideline (plus ~20% seasonal markup on the total)

High-End vanilla pod : vacuum sealed and roughly 9" in length, not the "around-the-corner" variety.
=>
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File Type: jpg pod22.jpg (156.7 KB, 165 views)
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Old 5th February 2011, 11:09 PM   #9509
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Originally Posted by Soundminded View Post
if they manufactured television sets the way high end audio equipment manufacturers manufacture their products you'd have to take a second mortgage out on your house to buy one.
Not exactly true, even back in the CRT days, the TV industry also had a High-End section.
For example the Spectra series by Nordmende in Germany, way back in the 1970s.
During the last two decades of traditional tube series, a Loewe set was a TV repairman's wet dream ; fully modular, PCBs and parts of the highest quality.
Global society nowadays is so screwed up that the individual can even opt to spend several million bucks on a TV set, covered in aligator dick skin and laid-in diamonds.

"High End" is also about longevity, service grade, and good looks, imo.
Maybe you still favor rebranded Hafler MOSFET amps by Sound Values, personally i fancy stuff that sounds, smells, and looks both good and solid.
(similar to a Ralph Lauren polo or a classic thick cotton shirt, they still feel and look 100% after the 100th wash or dry cleaners, or +$200 shoes)
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Old 5th February 2011, 11:50 PM   #9510
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Originally Posted by jacco vermeulen View Post
Restaurant business : markup factor of 5-6
Yachts, 60% material + 40% labor guideline (plus ~20% seasonal markup on the total)

High-End vanilla pod : vacuum sealed and roughly 9" in length, not the "around-the-corner" variety.
=>
Jacco - who scumbled your keyboard?? Or is it genuine bamboo ??
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