Are you suggesting a cap from the drain to source of the P-ch MOSFET?
The cap I was suggesting was from the drain to the gate of the P-ch MOSFET, balancing the greater Cgs of the N-ch MOSFET.
So it looks like I may have a bad cap in my F5, the problem is that it is a NOS cap I bought on here and I am unable to get more. Since I have to chance the PS I am figuring that I might as well switch from a CRC to a CLC. My problem is that I am unsure of the proper gauge of inductor I need. Is the recommended gauge of the wire in a F5 (16-14g) power supply the same as the recomended gauge of an inductor. This is what I am looking at picking up.
Sidewinder 2.25 mH Air Core Inductor 16 AWG: Madisound Speaker Store
If someone has a more economical solution, i would love to know about it. It seems to me that if I could get some cheap magnet wire, I could just coil it up and make my own but until I have a good meter that sounds like a lost cause.
Sidewinder 2.25 mH Air Core Inductor 16 AWG: Madisound Speaker Store
If someone has a more economical solution, i would love to know about it. It seems to me that if I could get some cheap magnet wire, I could just coil it up and make my own but until I have a good meter that sounds like a lost cause.
certainly doubled output power , tripled current reserve , and quadrupled perception of aural excitement
all that tnx to better ripple filtering , comparing to CRC
all that tnx to better ripple filtering , comparing to CRC
You see it correct, I talked Cgs! I read your post wrong.
You do feedback. For my idea:
See papa on the subject of balancing the capacitances..
The reason I like this 'balancing' is that it makes the top and bottom side behave correctly in phase at high frequencies (the way I look at it), because the input JFETS see different impedances if just left alone.
He is talking about the F4; the F5 is not a follower and differs of course because now they suffer from the Miller effect.
I found some other posts:
Jacco said on the input capacitance:
Maybe your idea is better?
Makes me wonder what the Biggie-est ever made CM iron core choke (in a CLC) is ?
(that looks difficult, no way I said that)
Thanks Zen, unfortunately I don't know coil length or diameter. I did find that the DCR is .54. Close but no cigar. Will I be ok as long as the DCR is under .4, no matter what the gauge is?
I am right in thinking that 2.2mH is about right, right?
That is very helpful, thank you. That site says that the inductor can handle 400w. With my PS being ~ 25V after rectification, that looks like it would make my limit 16A. Should I really be concerned that the dcr is .52 instead of being under .4? It's close but I am unsure how that will affect the circuit.
Are these viable options?
http://www.parts-express.com/pe/pshowdetl.cfm?PartNumber=255-108
Digi-Key - M8383-ND (Manufacturer - 1140-222K-RC)
From what I understand about inductors, if they have a metal core they saturate and become useless. From my searching on diyaudio there is some confusion when using an inductor for a CLC filter.
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WIRES.CO.UK 2.120mm to 2.800mm Polyester Enamelled Copper Wire
I got 2 kilos (is sold by weight) of this stuff and made up 2 coils.
IS about 12 AWG 2.24 mm
Realy thick stuff and a pain to wind up
Next time I will wind the 2 core side by side and make a comon Coke
Even beter that way
+ I went for CRCLC
As Zen said stay at less than 0.4 homs and you be ok
Here conversion table
wires.co.uk : Conversion data for AWG
Coils on the botom right (not that one can miss them )
I got 2 kilos (is sold by weight) of this stuff and made up 2 coils.
IS about 12 AWG 2.24 mm
Realy thick stuff and a pain to wind up
Next time I will wind the 2 core side by side and make a comon Coke
Even beter that way
+ I went for CRCLC
As Zen said stay at less than 0.4 homs and you be ok
Here conversion table
wires.co.uk : Conversion data for AWG
Coils on the botom right (not that one can miss them )
Attachments
Example (though these are 2.5mH, 11 gauge, and over 4.5lb each, you don't want that)
http://www.diyaudio.com/forums/atta...3d1119351988-krell-ksa-50-pcb-krell-coils.jpg
http://www.diyaudio.com/forums/atta...3d1119351988-krell-ksa-50-pcb-krell-coils.jpg
Yeah that the way look like I got half the weigth I needed or to put this another way
only 1 mH.
Now what about winding them wires side by side and make a comon mode coke
Will it be worth the efforth to re wind up my 2 coils?
only 1 mH.
Now what about winding them wires side by side and make a comon mode coke
Will it be worth the efforth to re wind up my 2 coils?
You see it correct, I talked Cgs! I read your post wrong.
For my idea:
See papa on the subject of balancing the capacitances..
The reason I like this 'balancing' is that it makes the top and bottom side behave correctly in phase at high frequencies (the way I look at it), because the input JFETS see different impedances if just left alone.
He is talking about the F4; the F5 is not a follower and differs of course because now they suffer from the Miller effect.
I found some other posts:
Jacco said on the input capacitance:
Maybe your idea is better?
A way of testing the 2 approaches would be to look at the square wave response. If the frequency response of the 2 sides is balanced, the square wave over/under-shoot should be the same (other than phase) for the rising and falling edges. I haven't done this test because I haven't gotten around to building an adequate square wave generator. Even at 192KHz from my sound card, the square wave has relatively slow edges.
Choke loaded is a completely different topology. It only works within a certain limit of constant current, and it then regulates the output!
The choke is a current generator (sort of) and has to be of high quality, otherwise it will make awful noises - and it will radiate all around the place. So that is why they must be big and developed for this purpose. This is indeed not for sissies. [I made a tube amp with such an LC power supply, loading to 2.200 mF 400 volt - good regulated but noisy].
:LOL
