Re: How does it affect power supply operation if filter caps are doubled in size?
From: at (poista.taatii_at_poista.welho.com)
Date: 08/30/04
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Date: Mon, 30 Aug 2004 21:20:23 +0300
"Tom Biasi" <tombiasi@REMOVETHISoptonline.net> wrote in message
news:MHHYc.21576$Es2.8532575@news4.srv.hcvlny.cv.net...
>
> "at" <poista.taatii@poista.welho.com> wrote in message
> news:cgv8f5$pvh$1@nyytiset.pp.htv.fi...
> >
> > "Tom Biasi" <tombiasi@REMOVETHISoptonline.net> wrote in message
> > news:8sDYc.16004$Es2.7796898@news4.srv.hcvlny.cv.net...
> > >
> > > "at" <poista.taatii@poista.welho.com> wrote in message
> > > news:cgush7$kla$1@nyytiset.pp.htv.fi...
> > Thanks. There are 2 caps in series, I guess it's to give better voltage
> > handling capacity.
> >
> > I've got one other question.
> >
> > Now if I change the diodes into a rectifier tube, that has a max
> capacitance
> > in the first filter as 60uF, and after that I place a resistor or a
choke,
> > what is the max capacitance the second filter stage can have (it's after
> the
> > resistor/choke)? I've heard people tell me it can be bigger than the
first
> > stage, and I've heard it cannot. So I'm somewhat confused what's the
> truth.
> > If I use a resistor, does it isolate the second filter stage from the
> first?
> > If I use a choke, does it do the trick?
> >
> > If you've got a regulated power supply, does that make things different?
> >
> > -at
> Hi at,
> It would help if you told more about your application for this supply.
> You sound as though you have little experience with high voltage supplies,
> be careful.
> You are describing very old design charistics. If you are working on and
old
> radio or other old device tell us what it is.
> Regards,
> Tom
This is just an example supply that's like many used in old tube-based audio
equipments. I know the dangers with high voltages, I'm not going to get
hurt. It's true I don't know much about the theory details, that's why I'm
writing to this basics newsgroup. I would like to know how the capacitors
work so I could see if I could benefit from better filtering. Big cans are
expensive so it's better to ask questions before deciding. I just would like
to know how big capacitors you can put into an tube amp with a tube
rectifier. I would want to get good filtering, so I'm interested to know if
I could put bigger caps in the other filtering positions, than what the tube
rectifier allows for in the first filter position.
-at
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