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Old 28th February 2013, 04:42 PM   #91
EUVL is offline EUVL  Europe
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Well, this is essentially a untiy-gain CFP F5 that I happened to have discussed with Nelson about 6~12 months ago.
It simulates OK, i.e. stable with reactive load.
But I do not think it can be compared to a Complementary Source Follower as the Beast is.
Above all different gain structure and distortion spectrum.


Patrick
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Old 28th February 2013, 04:42 PM   #92
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20V peak will be amusing.
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Old 28th February 2013, 04:58 PM   #93
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Quote:
Originally Posted by EUVL View Post
Well, this is essentially a untiy-gain CFP F5 that I happened to have discussed with Nelson about 6~12 months ago.
It simulates OK, i.e. stable with reactive load.
But I do not think it can be compared to a Complementary Source Follower as the Beast is.
Above all different gain structure and distortion spectrum.


Patrick
I am glad you have addressed this with Mr. Pass. I am not alone in this audio DIY universe who thinks about these matters. This unity gain CFP F5 arrangement of components reminds me of the STASIS [R,TM] power output stage. A Classic and everlasting winner.

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Old 28th February 2013, 05:01 PM   #94
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Some people swear by CFPs, because it is fast.
Some people don't like them, for the same reason.

I tend to think F5 already have a lot of gain.
So perhaps it will sound a bit too "bright" in unity gain.
But there is only one way to find out ....
So don't let me discourage you.


Patrick
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Old 28th February 2013, 05:22 PM   #95
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Quote:
Originally Posted by EUVL View Post
Some people swear by CFPs, because it is fast.
Some people don't like them, for the same reason.

I tend to think F5 already have a lot of gain.
So perhaps it will sound a bit too "bright" in unity gain.
But there is only one way to find out ....
So don't let me discourage you.


Patrick
Thank you for your replies. More details from you will be welcome. I visited your xen.com site, and looked at your schematics. Will a similarly configured BA3 Front End be a useful V/I converter? While I am at this idea, will a similarly configured F5 amplifer and/or descendants be useful as potent current source amps?
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Old 28th February 2013, 05:28 PM   #96
EUVL is offline EUVL  Europe
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I have no front end design for such a unity gain power buffer right now.
You should perhaps ask Nelson.

Your schematics for the buffer is essentially the same as what we simulated.
There are models around for all the devices, so you can build a Spice model easy enough.
But in the end you still have to build.
Then you can come back to tell us.




Patrick
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