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Salas hotrodded blue DCB1 build
Salas hotrodded blue DCB1 build
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Old 25th April 2012, 02:34 PM   #1911
Salas is offline Salas  Greece
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Quote:
Originally Posted by schubert View Post
Then otherwise a 100VA R-core and a 100VA toroid should be pretty indistinguishable in terms of sound? That's my impression.
Subjectively to my ears the result is calmer and softer with R-Core. Don't know if it is the discrete bobbins, the shield, or the lower capacitance for line noise coupling from primary to secondary.
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Old 25th April 2012, 02:38 PM   #1912
Salas is offline Salas  Greece
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Originally Posted by AndrewT View Post
If the second follows from the first, then surely there must be some audible benefit?
20dB (1/100th part) is a mighty big reduction in mains harmonics.
MC phono is a special needy case and there it is a must if in same box. Line or power level can be made quiet enough with no positioning and wiring mistakes when using EI or toroid. Still you may remember Roender recommending R-Core for close proximity boxing up with his folded cascode amp. I think you got one of those?
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Old 25th April 2012, 02:40 PM   #1913
AndrewT is offline AndrewT  Scotland
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But that is not addressing the claim
Quote:
Good for minimal magnetic field
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Old 25th April 2012, 02:43 PM   #1914
Salas is offline Salas  Greece
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What claim?
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Old 25th April 2012, 02:49 PM   #1915
Salas is offline Salas  Greece
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P.S.
just found some nice description of the R-Core design and traits here by just googling:
Products - Custom Magnetics, Inc.
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Old 25th April 2012, 02:50 PM   #1916
AndrewT is offline AndrewT  Scotland
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That claim in post1904 and followed up by
Quote:
20dB lower harmonic noise when exchanging a toroid with an R-Core
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Old 25th April 2012, 02:53 PM   #1917
Salas is offline Salas  Greece
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I don't think its a claim to say I found the R-Core emitting lower field than usual transformers, its designed for that.
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Old 25th April 2012, 02:57 PM   #1918
AndrewT is offline AndrewT  Scotland
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You are supporting the claim by re-expressing it.
Quote:
Good for minimal magnetic field
Have you previously posted elsewhere your experimental method and/or details?
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Old 25th April 2012, 02:58 PM   #1919
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My B1 is inaudibly quiet with a standard toroidal transformer.

With a Salas Shunt Reg, that gets rid of almost all residual noise.

Is it realy necessary to go the added expense for inaudible gain.
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Old 25th April 2012, 03:04 PM   #1920
Salas is offline Salas  Greece
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Originally Posted by AndrewT View Post
You are supporting the claim by re-expressing it.
Have you previously posted elsewhere your experimental method and/or details?
As I told you no, I haven't saved and posted before and after FFTs but I think that I had mentioned enough times in the phono thread that I use R-Core in solo MC boxes after I had found toroid unusable for hum and buzz unless separately boxed. I have no reason to pay bank transfer and shipping for R-Core from France if a locally made and instantly available toroid could cut it.
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