Inductive resistors for source resistors - Page 2

jh6you · 25th March 2005, 02:45 AM

Quote:

Originally posted by peranders ... the faster you want the output stage ...

Gee…… here, the phase angle between the sinusoidal emf and current is so big to metion the faster or the slower??????

You post resemble a god-damn spam mail.

Poor moderators are sleeping??????

joensd · 25th March 2005, 11:44 AM

Slightly off-topic but with wirewound (or inductive) resistors in series with the output you might get unwanted oscillations.
The original crescendo was quite "famous" for it and people changed the wirewound for 5 metall-oxides in parallel.

jh6you · 25th March 2005, 12:33 PM

Hi

I don't understand very well.

Once I saw a picture of Goldmund power amplifier. It had a pair of small coil (inductunce) // resistor, which was connected in series with the speaker terminal. I think that the L//R was to decouple any capacitive load, so to prevent oscillations at high frequencies.

I would like to see the wirewound resistor as a pair of L//R (L value is very low enough to be ignored, tho). Then, how could I explain that the wirewound resistor connected in series with the speaker terminal might be the origin of the oscillations?

Regards

25th March 2005, 11:44 AM	#12
joensd diyAudio Member Join Date: Dec 2001 Location: Germany	Slightly off-topic but with wirewound (or inductive) resistors in series with the output you might get unwanted oscillations. The original crescendo was quite "famous" for it and people changed the wirewound for 5 metall-oxides in parallel. __________________ jens

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25th March 2005, 12:33 PM	#13
jh6you Account Disabled Join Date: Aug 2002 Location: Near to the Pacific Ocean	Hi I don't understand very well. Once I saw a picture of Goldmund power amplifier. It had a pair of small coil (inductunce) // resistor, which was connected in series with the speaker terminal. I think that the L//R was to decouple any capacitive load, so to prevent oscillations at high frequencies. I would like to see the wirewound resistor as a pair of L//R (L value is very low enough to be ignored, tho). Then, how could I explain that the wirewound resistor connected in series with the speaker terminal might be the origin of the oscillations? Regards

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