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Old 26th April 2009, 12:59 AM   #2901
DaveM is offline DaveM  United States
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Nice build.
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Old 26th April 2009, 03:23 AM   #2902
spencer is offline spencer  Hong Kong
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Quote:
Originally posted by luvdunhill


Did you just reduce the value of the source resistor until the voltage was a certain percentage different on all the MOSFETs? What's a good guideline on how different the voltage drop across resistors can be and still have good performance?

I think if the voltage or current is within 5% is very good, 10% should not have any issue. The total power will be shared among the 3 mosfets. For performance I have no idea. I think a distortion meter or FFT analyzer is needed to see if any differences in harmonics content.
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Old 26th April 2009, 03:32 AM   #2903
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That is really a nice example of "purposing" materials to fit the application. Congrats.
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Old 27th April 2009, 02:12 PM   #2904
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can anyone tell me what is the different between F4 and F5.

and which one is better?.

thanks
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Old 27th April 2009, 07:00 PM   #2905
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Old 27th April 2009, 07:18 PM   #2906
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the 6moons F5 review has a little contrast if I am remembering correctly. It's pretty cheap (relatively) to build a single power supply and F4/F5 channels and have both.

Chris
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Old 28th April 2009, 01:49 PM   #2907
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are we need a speaker protector if i build F4?.

thanks.
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Old 28th April 2009, 01:49 PM   #2908
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sry i forgot to ask.

actualy what size of transformer we need to build F4?.

is 300va enough for 2 chnl?
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Old 28th April 2009, 02:05 PM   #2909
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally posted by bakpaosiomay
are we need a speaker protector if i build F4?.

thanks.
generally - anticlick ( delay circ ) and spk protection is welcome addition to any amp which is not containing output xformer or output cap .
but - it's not necessary


Quote:
Originally posted by bakpaosiomay
sry i forgot to ask.

actualy what size of transformer we need to build F4?.

is 300va enough for 2 chnl?

say that 300VA is lowest value you can use , and still sleep well .....

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Old 29th April 2009, 03:03 PM   #2910
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will my speakear blow if i dont use any speaker protector?
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