Please consider donating to help us continue to serve you.
Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
||Thread Tools||Search this Thread|
|30th March 2012, 08:58 PM||#1|
Join Date: Jul 2011
Location: Sofia, Bulgaria
How does iron quality affect the power supply?
My question in directly related to the use of old chokes and transformers. Here, I can get 5H 0,08A chokes for very cheap ~2,5USD, but they have been used in old tube TVs.
Because these chokes are very cheap, I'm building a C LCLCLCRC power supply for my tube DAC part with them. My goal is to eliminate electrolytics in the path. Because these chokes are so cheap, I can do 5-6x LC filters if I want to .
So, the chokes are old, but what about the iron? These are from old russian tube TVs and could be at least 30-40 years old.
The same goes for power transformers. I have few that are center tapped and are perfect for tube rectifiers.
|30th March 2012, 09:46 PM||#2|
Join Date: Nov 2003
Location: Brighton UK
Modern iron might be somewhat smaller for the same peak flux,
and eddy losses might be lower depending on the lamination
practises used, but iron is basically iron in inductors AFAIK.
Same with power transformers, same issues.
At power supply frequencies both should be fine.
FWIW a old valve amplifier trick :
This was usualy done using CRC type filters for dropping voltages,
and might work for CLC type filters to simplify them a lot :
For class A circuits the power supply load is constant.
If you have a supply that shifts the input phase by 180 degrees,
this can be right for 3 cascaded RC voltage droppers, you can then
"inject" the input ripple via a capacitor and high value resistor into
the 3rd stage output to cancel any residual ripple ... clever or what ?
There is nothing so practical as a really good theory - Ludwig Boltzmann
When your only tool is a hammer, every problem looks like a nail - Abraham Maslow
Last edited by sreten; 30th March 2012 at 09:59 PM.
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Can a power cord affect sound quality??||sully||Parts||193||14th November 2013 10:13 PM|
|How do fuses affect the sound quality?||audiogeekess||Multi-Way||2||17th March 2012 02:39 PM|
|Pluggin a rated 80w soldering iron into a 40watt power supply||deuce42||Equipment & Tools||1||19th February 2012 01:58 PM|
|Hole in Dust Cap Affect Sound Quality ??||excetara2||Multi-Way||20||4th September 2009 10:30 PM|
|New To Site?||Need Help?|