John Curl's Blowtorch preamplifier part II

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It still won't be real HiFi without proper input power management:

LA 500kV thyristors.jpg

Thanks,
Chris
 
If one wants to find an easy to obtain source for highly flexible, fine strand, mega-multi-strand copper cables.... look no further than welding cable.

Once upon a time, I brought some welding cable, to Noel Lee for his speakers.... started him in audio as Monster Cable. True story. That's the source of the company name.


THx-RNMarsh
 
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If one wants to find an easy to obtain source for highly flexible, fine strand, mega-multi-strand copper cables.... look no further than welding cable.

Once upon a time, I brought some welding cable, to Noel Lee for his speakers.... started him in audio as Monster Cable. True story. That's the source of the company name.


THx-RNMarsh
Is that the same "Noel Lee" from Australia that
once had a well recieved tube preamp design ?
 
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If one wants to find an easy to obtain source for highly flexible, fine strand, mega-multi-strand copper cables.... look no further than welding cable.

Once upon a time, I brought some welding cable, to Noel Lee for his speakers.... started him in audio as Monster Cable. True story. That's the source of the company name.


THx-RNMarsh

I think they were talking Litz wire too, I have mentioned my 0000 welding cable often here but I use it for a 100' 250A run from batteries to inverter.
It is also used in the electroplating biz. It's gotten rather pricey, that copper clad aluminum was very flexible but also not Litz.
 
0000 cable

I think they were talking Litz wire too, I have mentioned my 0000 welding cable often here but I use it for a 100' 250A run from batteries to inverter.
It is also used in the electroplating biz. It's gotten rather pricey, that copper clad aluminum was very flexible but also not Litz.

yep... we used to try REAL HARD not to draw any spark over the chrome bath when placing racks passing 800 amps into 140 F high gravity chromic acid, lest you trigger a hydrogen explosion from the foam blanket and find yourself drenched... <<- not good for the skin

John L.
 
yep... we used to try REAL HARD not to draw any spark over the chrome bath when placing racks passing 800 amps into 140 F high gravity chromic acid, lest you trigger a hydrogen explosion from the foam blanket and find yourself drenched... <<- not good for the skin

John L.

When I was a kid in Milwaukee a primo summer job was giving vacation time to the union guys down at the Harley plant's chrome shop. I chose to ride the garbage truck instead.
 
Yesterday I got the latest 'The Absolute Sound' magazine and was I 'reset'!
Did you know that several relatively silent contributors to this thread are actively going forth in direct competition with Constellation products, both in build and cost?
I keep hearing how expensive the Blowtorch preamp was. NO, it was a bargain, in today's world.
A $9000 power amp from Parasound is a 'steal' compared to many tens of thousands for something with 1/4 the power.
People DO realize the limitations of CD and the qualities of the best analog recordings, as well as differences between SACD and DVD.
Even relatively 'cost effective' companies like OPPO have come to appreciate Class A headphone amps, etc, etc. I have been listening to the wrong people, and now I have to go back to aggressive design just to keep slightly ahead, if possible. My new test equipment, will, hopefully give me new insight for future designs.
 
The Absolute Sound Magazine

Issue 242 April 2014
The 1% Solution
Editorial By Robert Harley

But I have news for these readers; it's the strong demand for reference-class products that sustains the high-end-audio industry and makes it possible for consumers to own affordable, terrific-sounding systems. The "1%" end up funding the R&D for cutting-edge technologies — technologies that find their way into affordable products over time. Do you think that the stunningly high price-to-performance ratio in today's entry-level and mid-priced products would have been possible if the high end had confined its ambitions to heavily price-constrained designs?

I don’t find that this opinion reflects the reality.
If there is something as cutting edge in audio today, this is in the hands of A/D, D/A and DSP IC manufacturers, who develop their products (along with data sheet & application notes 😉 ) for the mass product market.
They offer hardly overpriced products.

What do you say?

George
 
The Absolute Sound Magazine

Issue 242 April 2014
The 1% Solution
Editorial By Robert Harley



I don’t find that this opinion reflects the reality.
If there is something as cutting edge in audio today, this is in the hands of A/D, D/A and DSP IC manufacturers, who develop their products (along with data sheet & application notes 😉 ) for the mass product market.
They offer hardly overpriced products.

What do you say?

George

George I agree with you, the massive build etc. high end is essentially invisible to the industry at large. I can't share the details but just today I was involved in a smart phone audio issue, scarey.
 
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