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Old 24th February 2013, 11:10 AM   #411
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Hi Juma

Thanks for explaining the function of the series CR.
I have 4.7u polyesters...
...OK ?

Cheers.

Si.
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Old 24th February 2013, 11:12 AM   #412
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I like your drawings Tinitus !

Si.
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Old 24th February 2013, 11:24 AM   #413
juma is offline juma  Germany
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Quote:
Originally Posted by The Space Egg Corp View Post
...I have 4.7u polyesters...
...OK ?...
OK
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Old 24th February 2013, 11:25 AM   #414
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If the voltage for the mosfets is +-22vdc can the source resistors then still be 0.33 ohm or do they need to be 0.68 ohm like in the schematic on the second page ?
Or has this more to do with the changed NFB in circuit 2 ?
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Old 24th February 2013, 11:35 AM   #415
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They can. You'll increase the dissipation loss per transistor by 10 percent.
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Old 24th February 2013, 12:31 PM   #416
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Hi again Juma !

Another 'cappy' question...

In my 'cap stash' I have a whole-load of 40uF motor-runs...
...and 40x of the 4.7uF polyesters.

Would you consider it's worth using any of these ( get em' out the parts bin & juice em' ! )...
...and if so, where ?

The motor-runs were for a valve-project and / or mains filters...
...but I do have rather an excess !!!
( bit of a waste of voltage capacity...but people do, right ? )

Cheers.

Si.
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Old 24th February 2013, 01:08 PM   #417
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by The Space Egg Corp View Post
In my 'cap stash' I have a whole-load of 40uF motor-runs...

Would you consider it's worth using any of these
one connected at each output mosfet

which is why I would have liked to have a power supply connection placed at each
basicly its just a few exstra holes for optional connectors
well, and maybe a few exstra ground points as well
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Old 24th February 2013, 02:02 PM   #418
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Quote:
Originally Posted by tinitus View Post
one connected at each output mosfet

which is why I would have liked to have a power supply connection placed at each
basicly its just a few exstra holes for optional connectors
well, and maybe a few exstra ground points as well

OK, I added buffer caps to the boards (for example Nippon Chemicon super low ESR PXA series).

Central groundig point (0 V) is the load/buffer caps. So there are no extra terminals necessary at the amp boards.
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Old 24th February 2013, 02:15 PM   #419
tinitus is offline tinitus  Europe
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well, now we are at it and looking again, at your change, I wonder if a 'partly' groundplane would be possiblee
from ground connector, and going through like fingers between all mosfets ?
that way we could place a whole row of small caps, if we wish to
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Old 24th February 2013, 07:23 PM   #420
generg is offline generg  Germany
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Hi permaneder,

they keep you busyyyy......
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and the First Wtt is......a really First Class PSS Idea
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