Need some help with PSU Designer II

Bricolo · 14th November 2002, 01:55 PM

How can I put 2 capacities in parallel?

I always get an error message when I try to do this

thx

dhaen · 14th November 2002, 02:18 PM

I don't think you can, but...
You can just add the values and apply the total to the capacitor in circuit.
Or, add an LC or RC filter, making R or L so small as to have negligable effect.

Bas Horneman · 14th November 2002, 02:28 PM

You're right John..

one just can't do it..so you can't see the effect of a bypass cap etc..it is pointless anyway trying to detect that in psu designer..I just use it for ballpark figures..

Only a good scope or a good set of ears can determine that effect..

I hope you have a good scope John, otherwise you're lost ;-)

Bricolo · 14th November 2002, 02:52 PM

ok

since 2 smaller caps are discharging faster than a single big one (that has the same cap), it would be cool to put 2 caps in //

another question: how can I mesure my caps, selfs, and transformer resistance?

Bas Horneman · 14th November 2002, 02:57 PM

The transformer you can just measure the resistance with your multimeter...

Don't know bout the rest..

Bricolo · 14th November 2002, 03:31 PM

OK
i'll measure this when i'll be able to find the transformer...

roddyama · 14th November 2002, 03:36 PM

Hi Bricolo,

WRT the measuring the capacitor equivalent series resistance, take a look at this article by Walter G. Jung and Richard Marsh
from Audio Mag.http://www.capacitors.com/pickcap/pickcap.htm#signal

You'll also need a frequency generator. Dialetric absobtion requires a little more circuitry.

Rodd Yamashita

Bricolo · 14th November 2002, 04:44 PM

I've measured 53 Ohm for the primary (230V) and 1 Ohm (!!!) for the secondary (12V)
Is this possible??

dhaen · 14th November 2002, 05:23 PM

Bas said:

Quote:

I hope you have a good scope John, otherwise you're lost ;-)

Tektronix TDS210:
http://www.tek.com/Measurement/cgi-bin/framed.pl?Document=http://www.tek.com/Measurement/Products/catalog/tds200/eng/specs.html&FrameSet=mbd

Only 60 MHz, samples at 1GHz, but fine for audio, and slow logic.
Can only justify the cost because I also use it to earn money!

Used to have a used Tek 453, lovely scope but too heavy.

Cheers,

dhaen · 14th November 2002, 05:25 PM

Bricolo wrote:

Quote:

I've measured 53 Ohm for the primary (230V) and 1 Ohm (!!!) for the secondary (12V)

Yes, absolutely typical.
The lower the DC resistance, the better.

14th November 2002, 01:55 PM	#1
Bricolo diyAudio Member Join Date: Nov 2002 Location: Grenoble, FR	Need some help with PSU Designer II How can I put 2 capacities in parallel? I always get an error message when I try to do this thx

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Calling X-over designer	ttan98	Multi-Way	12	13th February 2008 11:08 PM
Is PSU Designer II correct?	zxx123	Tubes / Valves	7	20th January 2008 05:21 PM
[b]pcb Designer Wanted [/b]	sakis	Solid State	6	18th December 2007 11:57 PM
Hello, from amp designer	rmetz	Introductions	2	29th January 2002 07:18 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	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

14th November 2002, 02:18 PM	#2
dhaen diyAudio Moderator Emeritus Join Date: Jun 2002 Location: U.K.	I don't think you can, but... You can just add the values and apply the total to the capacitor in circuit. Or, add an LC or RC filter, making R or L so small as to have negligable effect.

14th November 2002, 02:28 PM	#3
Bas Horneman diyAudio Moderator Emeritus Join Date: Apr 2002 Location: The Netherlands Blog Entries: 18	You're right John.. one just can't do it..so you can't see the effect of a bypass cap etc..it is pointless anyway trying to detect that in psu designer..I just use it for ballpark figures.. Only a good scope or a good set of ears can determine that effect.. I hope you have a good scope John, otherwise you're lost ;-)

14th November 2002, 02:52 PM	#4
Bricolo diyAudio Member Join Date: Nov 2002 Location: Grenoble, FR	ok since 2 smaller caps are discharging faster than a single big one (that has the same cap), it would be cool to put 2 caps in // another question: how can I mesure my caps, selfs, and transformer resistance?

14th November 2002, 02:57 PM	#5
Bas Horneman diyAudio Moderator Emeritus Join Date: Apr 2002 Location: The Netherlands Blog Entries: 18	The transformer you can just measure the resistance with your multimeter... Don't know bout the rest..

14th November 2002, 03:31 PM	#6
Bricolo diyAudio Member Join Date: Nov 2002 Location: Grenoble, FR	OK i'll measure this when i'll be able to find the transformer...

14th November 2002, 03:36 PM	#7
roddyama diyAudio Moderator Emeritus Join Date: Jan 2002 Location: Michigan	Hi Bricolo, WRT the measuring the capacitor equivalent series resistance, take a look at this article by Walter G. Jung and Richard Marsh from Audio Mag.http://www.capacitors.com/pickcap/pickcap.htm#signal You'll also need a frequency generator. Dialetric absobtion requires a little more circuitry. Rodd Yamashita

14th November 2002, 04:44 PM	#8
Bricolo diyAudio Member Join Date: Nov 2002 Location: Grenoble, FR	I've measured 53 Ohm for the primary (230V) and 1 Ohm (!!!) for the secondary (12V) Is this possible??

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)