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-   -   Bias up in Zen v4 (http://www.diyaudio.com/forums/pass-labs/33789-bias-up-zen-v4.html)

porfi4ever 9th May 2004 10:21 PM

Bias up in Zen v4
 
Hi guys, in Zen v4 project Mr. Pass said we can get more bias replacing R1 with .47 ohms what happens if I use .5 ohms 12 w resistors. I have a bunch of mills resistors laying in my bech, can I use them or not?

till 9th May 2004 10:35 PM

if you have 1R parallel to 0,5 R you will have 2A bias.

if you have 0,5 parallel with 0,5R you get 2,6A Bias

if you have only one 0,5R you get 1,3A bias.

You donīt need 12W types, each 0,5R resistor will burn about 1/3 W

porfi4ever 10th May 2004 01:19 AM

Quote:

Originally posted by till
if you have 1R parallel to 0,5 R you will have 2A bias.

if you have 0,5 parallel with 0,5R you get 2,6A Bias

if you have only one 0,5R you get 1,3A bias.

You donīt need 12W types, each 0,5R resistor will burn about 1/3 W


I know 12w types is too much but are the ones that I have.Any problem to use them ?

MikeW 10th May 2004 10:44 AM

Yes you can use them.

porfi4ever 10th May 2004 02:11 PM

Hi MikeW, glad to see you. Mike my Zen v4 is working right now but the sound is not like yours. Yours is better, has more dynamics more bass, overall yours sounds great.

jh6you 10th May 2004 04:10 PM

O...?

In my opinion, the sound difference could mainly come from the different current gains. It would be interesting in comparison of the current gain levels.

MikeW 10th May 2004 04:47 PM

Changed values?
 
I think I changed R2,R3, and R16. I will look through my notes if I can find them.


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