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1st February 2012, 03:44 PM
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#11791 |
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diyAudio Member
Join Date: May 2009
Location: Riga, LV
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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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1st February 2012, 03:46 PM
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#11792 | |
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diyAudio Member
Join Date: Mar 2010
Location: Lithuania
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Quote:
Those are 2x3w actually 
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1st February 2012, 03:49 PM
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#11793 |
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diyAudio Member
Join Date: May 2009
Location: Riga, LV
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sorry, they look smaller
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3rd February 2012, 10:43 AM
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#11795 |
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diyAudio Member
Join Date: Oct 2002
Location: The Netherlands, Utrecht
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Nope !
Have patience.
Just a few more night sleep and you'll be the first to see it  Audiofanatic 
__________________
Be nice to animals. |
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3rd February 2012, 06:15 PM
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#11796 | |
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The one and only
Join Date: Mar 2001
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Quote:
The text will be done in a few days - you will see it next week.
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4th February 2012, 01:09 AM
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#11798 | |
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diyAudio Member
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
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Quote:
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4th February 2012, 07:43 AM
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#11799 | |
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diyAudio Member
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Quote:
__________________
See my 2SK175/2SJ55 F5.. CS8412/SAA7220/TDA1541 ; SP-6 Light ; MC30 Super--> two stage RIAA 2SK240-ECC88/6SL7.
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4th February 2012, 09:29 AM
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#11800 |
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diyAudio Member
Join Date: Oct 2010
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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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| Dennis Hui, Bksabath |
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