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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: Re: power transformer advice needed posted by Ray Moth on March 6, 2007 at 12:27:41:
Thanks for jogging my memory. I recall reading an article about this particular disadvantage of toroids.I wonder, though, if the PS filtering won't eliminate HF noise.
To quote from a site I read up on sometime ago (http://members.tripod.com/~gabevee/mypwrsup.htm ) where the author was talking about SS diode induced hash in a power supply...
"
A 3 henry choke at 120 hertz has a reactance of about 2300 ohms. The same choke at 10 to 20 kilohertz, the region where hash likely is, will have a reactance of:Xc=2PiFL=6.28x10 000x3=188400
A whopping 188 Kilohms!, How the heck can hash get past that
"
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Follow Ups
- Thanks, .... though I wonder - zobsky 12:47:05 03/06/07 (11)
- Re: Thanks, .... though I wonder - arend-jan 06:03:26 03/07/07 (0)
- Re: Thanks, .... though I wonder - drlowmu 14:08:40 03/06/07 (0)
- Re: Thanks, .... though I wonder - zarniwoop 13:16:02 03/06/07 (8)
- Re: Thanks, .... though I wonder - drlowmu 14:04:51 03/06/07 (6)
- Have you ever listened to one? - thermionic addictions 14:30:26 03/06/07 (5)
- See this, interesting !!! - drlowmu 13:06:35 03/07/07 (1)
- Allright Jeff..... - thermionic addictions 14:06:45 03/07/07 (0)
- Sure have !!.................... - drlowmu 22:01:51 03/06/07 (2)
- Listen to yourself ... - mikeyb 05:45:22 03/07/07 (1)
- Re: Listen to yourself ... - drlowmu 11:13:47 03/07/07 (0)
- I have to agree with zarniwoop..... - thermionic addictions 13:49:32 03/06/07 (0)
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