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In Reply to: RE: Another query from Audio Note camp -300B filament supply. posted by Alex Kitic on April 06, 2015 at 23:52:51
Alex
A regulator based filament supply looks like a much more expensive proposition to implement than simple rectifier and Pi filter . Also it provides fairly stable and consistent voltage irrelevant of mains line fluctuations in many countries a manufacturer like Audio Note sells their wares.
In my opinion its perfectly OK if Audio Manufacturer is becoming wealthy from making a product. We don't mind rich shoemakers , plumbers or corporate lawyers but somehow a manufacturer of audio buying a Bugatti is a major offense , why ?
Follow Ups:
@Wojciech
Your reply shows that you have done no work / experiment on the subject (DH tube heaters), otherwise you would know exactly what I am referring to.
As for someone becoming rich by doing one job or another, there is nothing wrong with that - besides the side effect called greed. I do not accept greed, and thus I do mind whichever professional getting rich through the exercise of greed on naive customers.
Business requires profit in order to survive and thrive: the difference between thriving and getting rich usually lies in the profit margins, often dictated by greed.
******
http://rh-amps.blogspot.com/
@Wojciech
"""Your reply shows that you have done no work / experiment on the subject (DH tube heaters), otherwise you would know exactly what I am referring to."""
Alex , that would be true :)
Basically ,I wanted to establish where on the importance/audibility leader in the amp filament supply really sits.
I believe customers are not that naive, giving the choices nowadays.
Best , W
A 7805 kills hum but does not sound particularly good
I would go for a separate filament transformer at the very least . You would not believe the horridness that a capacitor input filament supply does until you see the crud it puts onto other windings on the mains transformer .
Good sounding filament supplies go even further than this : schottky rectification and choke input supplies are a good starting point along with a separate filament transformer . CCS filaments IMO are the way to go but this adds even more complexity and requires a separate transformer per filament for best results
Al
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