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Old 25th May 2012, 03:43 AM   #461
EUVL is offline EUVL  Europe
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Long time no hear. Hope all is fine.


Patrick
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Old 25th May 2012, 03:57 AM   #462
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Long time no hear. Hope all is fine.


Patrick
Hello my friend.
I should be back for a while now.
Very happy to help you with anything
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Old 25th May 2012, 04:23 AM   #463
EUVL is offline EUVL  Europe
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If you are still interested in building the F5X, just drop me a mail.
We'll see what can be arranged.


Patrick
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Old 25th May 2012, 04:49 AM   #464
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How is the chassis looking now?
I will be doing monoblocks.
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Old 25th May 2012, 05:31 AM   #465
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Just word of warning Nelson.
You better be going to work early and staying back late everyday over next few weeks.
Something is in the mail.
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Old 25th May 2012, 05:35 AM   #466
EUVL is offline EUVL  Europe
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See here :

F5X -- the EUVL Approach


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Old 25th May 2012, 05:39 AM   #467
lhquam is offline lhquam  United States
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Did you perform your simulation with 15V Peak on a 3 Ohm load ?
Yes, 15V peak, not peak-to-peak, into 3 ohms.
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Old 25th May 2012, 05:42 AM   #468
lhquam is offline lhquam  United States
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Originally Posted by Melon Head View Post
Post your results.
Do you have a model for MUR3020 ?
I could not find a model for the MUR3020, but used the MUR2020 instead. That could be the problem. Can you provide a Spice mode for the MUR3020?
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Old 25th May 2012, 05:49 AM   #469
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.MODEL MUR3020wt D(IS=2.09832e-06 RS=0.0102995 N=2 EG=1.27539 XTI=0.5 BV=200 IBV=1e-05 CJO=1.14907e-09 VJ=0.4 M=0.888092 FC=0.5 TT=7.76886e-08 KF=0 AF=1)
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Old 25th May 2012, 02:13 PM   #470
lhquam is offline lhquam  United States
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Originally Posted by Melon Head View Post
.MODEL MUR3020wt D(IS=2.09832e-06 RS=0.0102995 N=2 EG=1.27539 XTI=0.5 BV=200 IBV=1e-05 CJO=1.14907e-09 VJ=0.4 M=0.888092 FC=0.5 TT=7.76886e-08 KF=0 AF=1)
Thanks for the Spice model. I now get THD plots very similar to yours. The main difference is that my 2nd harmonic is higher than yours in both cases. Could be due to differences in Spice models for the IRFP240/IRFP9240 MOSFETs, or slight differences in biasing. My biasing looks good: it required careful adjustment to get 15 V peak without leaving class-A.
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