diyAudio (http://www.diyaudio.com/forums/index.php)
-   Pass Labs (http://www.diyaudio.com/forums/pass-labs/)
-   -   5 % resisters for SOZ? (http://www.diyaudio.com/forums/pass-labs/11352-5-resisters-soz.html)

 Selfmade 19th February 2003 05:59 PM

5 % resisters for SOZ?

Is it possible to use 5% restisters (R1-R8) for the SOZ or is absolutly necessary to use the qualities (1%, 0,1 %) mentioned in the NP article?

regards

Günter

 Henrik 19th February 2003 07:50 PM

To obtain a low diffrential dc off set you need resonable matced resistors. You can parallel the higher values with some resistor to match the lower value. The formula for this is R=1/((1/R1)+(1/R2)).

 stefanobilliani 19th February 2003 08:00 PM

Quote:
 Originally posted by Henrik To obtain a low diffrential dc off set you need resonable matced resistors. You can parallel the higher values with some resistor to match the lower value. The formula for this is R=1/((1/R1)+(1/R2)).
Or ... R = ( R1* R2 ) / (R1+ R2)
:rolleyes:

 Selfmade 19th February 2003 08:50 PM

Are 25 Watt enough for the resisters R1-R8 to build a 10 Watt SOZ? For this values I can find 1 % resistors.

regards

Günter

 Henrik 19th February 2003 09:14 PM

10 watt output requires psu at +-25 Volt, which gives a total current draw at about 4.5 A. This means a little less than 50 W dissipation in all 8 Ohm resistors. I would go for 75W each just in case. You can parallel 3*25W to obtain one resistor at 75W.

 All times are GMT. The time now is 01:09 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.