I bought an Antek AN-4218 for my F5 a while ago and after building and rebuilding my amp I finally got it how I want it. I just have one problem, the transformer developed a mechanical buzz. I can't feel the buzz in the transformer but I can hear it. I have the amp biased at .61 and temps are in acceptable range. There are no other problems with the amp and I am very happy with the sound. Is there anything I can do about this or do I just need to order another one? Is 400VA to small?
I have 6 X 33,00uf total in a clc configuration.
33kuF-33kuF-2mH inductor (don't remember eaxactly if that is value but it's close)-33kuF
I have rubber underneath the torroid and under the mounting plate. The buzz if faint but I can hear it because it resonates in the enclosure.
No dimable lights on this circuit but I could try connecting it to another outlet and see what happens.
33kuF-33kuF-2mH inductor (don't remember eaxactly if that is value but it's close)-33kuF
I have rubber underneath the torroid and under the mounting plate. The buzz if faint but I can hear it because it resonates in the enclosure.
No dimable lights on this circuit but I could try connecting it to another outlet and see what happens.
and the voltage through the external mosfets legs is present 1.6v, but still no voltage at R11/R12
What voltage do you have across R3 & R4?
i 've killed the f***in' ground loop
it took me quite a while to understand the internal ground loop
in my f5; but finally, (with a friends help) i got rid of it!
the signal wire is now led very very tight to the (dc-power/audioground) cabel tree from the plug 'til f5 boards.
no more hum no matter what source.
great amplifier!
thanks to nelson and you all
it took me quite a while to understand the internal ground loop
in my f5; but finally, (with a friends help) i got rid of it!
the signal wire is now led very very tight to the (dc-power/audioground) cabel tree from the plug 'til f5 boards.
no more hum no matter what source.
great amplifier!
thanks to nelson and you all
What voltage do you have across R3 & R4?
R4 1.6 V
R3 0.4 V ??????????
With the power off and P1 & P2 set to maximum, you should get a reading of approx 1K7 across R3 & R4, if you have, your JFETs are probably duff, the only way to find out is to remove them and check their IDSS.
0.6K
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