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 ;-)
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 ;-)
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
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
Bas said:
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,
Tektronix TDS210:I hope you have a good scope John, otherwise you're lost ;-)
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,
Bricolo wrote:
The lower the DC resistance, the better.
Yes, absolutely typical.I've measured 53 Ohm for the primary (230V) and 1 Ohm (!!!) for the secondary (12V)
The lower the DC resistance, the better.
Bricolo,I also think that my multimeter is not precise enough for very lor resistance values
You'r right of course.
Contact resistance is also variable at this level. But unless you are talking "lots of amps" the measurement is accurate enough.
Just run the simulator twice; once with the highest reading, then with the lowest. Youll see the relevance then.
Cheers,
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