Hi Meanman,
Please see the link in my signature for more info.
Hex is thoroughly tested and PCBs we've got available are actually best suited for Hex version.
Cheers,
Valery
Did see your your website looking realy good .I saw you're providing parts aswell for the HEX version?
Links for the trafo and heatsink for the VHex+ here:
http://www.diyaudio.com/forums/clas...iy-just-buy-commercial-amp-2.html#post4755562
http://www.diyaudio.com/forums/clas...iy-just-buy-commercial-amp-2.html#post4755562
The amp pcb. That's perfect i have some 8x2.5" heatsinks and a transformer in a old amp enclosure.
xrk971, would you mind sharing more specifics of your power supply, maybe a schematic?
xrk971, would you mind sharing more specifics of your power supply, maybe a schematic?
Sure, it's here (I actually used 10A1 diodes not 1N4003):
http://www.diyaudio.com/forums/clas...ual-rail-450w-supply-20-a-12.html#post4733565
It's a CRCLC with some snubbers, bleed off resistors and bypass caps. Basic 4700uF 50v caps X 6 and some power resistors and a hand rolled inductor. For the second time I did this I got a nice Coilcraft inductor with a split core so that it doesn't saturate. They are huge though (use flat copper wire). But I find the cheap hand made ones work just as well from ripple standpoint.
Back when I used a single PSU. Changing to dual PSU is one the best things you can do for sound quality. Soundstage is huge. Immediately noticeable improvements.
The supply rails to a power amplifier do not supply current along both rails at the same time as the music comes out of the speaker.
The ground rail passes no current or virtually no current when the amplifier is quiescent, i.e. no output current = no ground rail current.
The supplies, +ve & -ve, send and return the same current when the amplifier output is zero.
When the amp output is an AC signal, the supply rails alternately supply current on +ve half and -ve half of the AC waveform.
The supplies do not send current at the same time !!!!!!!!!!
A common mode inductor with an iron, or ferrite, core REQUIRES the two currents to match, to cancel the core flux. If one half of the inductor wiring sees unbalanced current, then it will saturate at some current.
You have to use an inductor rated for the unbalanced supply rail current.
The ground rail passes no current or virtually no current when the amplifier is quiescent, i.e. no output current = no ground rail current.
The supplies, +ve & -ve, send and return the same current when the amplifier output is zero.
When the amp output is an AC signal, the supply rails alternately supply current on +ve half and -ve half of the AC waveform.
The supplies do not send current at the same time !!!!!!!!!!
A common mode inductor with an iron, or ferrite, core REQUIRES the two currents to match, to cancel the core flux. If one half of the inductor wiring sees unbalanced current, then it will saturate at some current.
You have to use an inductor rated for the unbalanced supply rail current.
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Look at the diagram, it's not a common mode choke (CMC) inductor. There are two of them, one for each rail between the last two caps. Each is independent.
Model AGP4233-474ME. It's not a CMC - just a flat copper wire choke with a split ferrite core.
http://www.coilcraft.com/pdfs/agp4233.pdf
It's the 0.474mH model
3.4Adc for 30% loss of inductance might give you sufficient margin to remain as an effective inductor during ClassAB operation.
this statement is not supported by the manufacturer.
I think I am good with 3.4A - at that much draw I don't think the filtering for ripple matters much.