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Old 1st February 2012, 03:44 PM   #11791
osscar is offline osscar  Latvia
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Very good amp Tolikas,

looks like you're thrown out protection circuit .

your source resistors is not too hot? it seems that you have 2x 0.6W (in my f5 i have 5w resistors and there is approx. 60 degrees on them).
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Old 1st February 2012, 03:46 PM   #11792
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Quote:
Originally Posted by osscar View Post
Very good amp Tolikas,

looks like you're thrown out protection circuit .

your source resistors is not too hot? it seems that you have 2x 0.6W (in my f5 i have 5w resistors and there is approx. 60 degrees on them).
Protection circuit has a negative effect on overal l sound quality, i have tested it before throwing out...
Those are 2x3w actually
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Old 1st February 2012, 03:49 PM   #11793
osscar is offline osscar  Latvia
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sorry, they look smaller
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Old 3rd February 2012, 07:45 AM   #11794
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Me

today?

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Old 3rd February 2012, 10:43 AM   #11795
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Default Nope !

Have patience.

Just a few more night sleep and you'll be the first to see it


Audiofanatic
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Old 3rd February 2012, 06:15 PM   #11796
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Quote:
Originally Posted by tolikas View Post
just finished my F5, outstanding performance.
I see you left room for F5 Turbo parts.

The text will be done in a few days - you will see it next week.

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Old 4th February 2012, 12:57 AM   #11797
mikojat is offline mikojat  Indonesia
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I'm ready
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Old 4th February 2012, 01:09 AM   #11798
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The text will be done in a few days - you will see it next week.
That's what my wife keeps saying about her PhD thesis -- ever here the one about Penelope unweaving the shawl every evening?
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Old 4th February 2012, 07:43 AM   #11799
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That's what my wife keeps saying about her PhD thesis -- ever here the one about Penelope unweaving the shawl every evening?
who are the suitors then?
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Old 4th February 2012, 09:29 AM   #11800
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Hello,
I've not been able to find or to understand an explanation to the need of matching transistors in the original F5 amplifier.

Within a single channel, I "extrapolate" from various diyaudio threads that P and N MOSFETs don't need to be matched (also because they are technically different). But what about the JFETs?

I also "extrapolate" that matching MOSFETs and JFETs between left and right channel is not necessary (probably it's useful if I want to do the same operations to bias the two channels, but I'm not sure about it).

Any help is really appreciated
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