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Group Build: Dynafet


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Did some work on mocking up the chassis and getting into a more listenable state. I will need to get aluminum top/bottom and rear panels for this (not using the steel ones that it came with). I'm also

Got both boards up and running with mods 1 and 2 above. Ran RMAA on it at 150mA, 100mA and 75mA bias. I think 150mA is probably the best. See what any of you think of the plots attached. Als

Documenting how these are configured: Vbe multiplier: R17-R18: 3.3K R62: 1K VR3: 20K R19-R20: 2K Mods: Cordell zobels: 100pf / 90.9R from gate to ground (Cordell use

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What's the parts count per board?

And it's one thing to populate a few boards, it's another thing entirely to build an amp soup to nuts. Even with a fully machined chassis it's no small feat with an amp of this complexity.

I understand. I can populate the boards and probably debug problems (with just a little help. :rolleyes:) I'd need lots of help when it comes to casing it up. However, if some of the casework is done, I might be able to muddle through it.

Of course, it really depends on what cost we are talking about. My question may be quite moot (to me).

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  • luvdunhill - 8 - 4
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    As for the cases I think the Hi-Fi 2000 Pesante Dissipante is a good option. And it seems if you order 4 or more they don't charge shipping. Could also be an error in their software.

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How about a case with integral heatsinks?

Something like this:

media%5Cpesdiss10x7.jpg

Man that's like exactly the case my Rudistor RP010 Classic was in. I rather liked the case though I could have done without the handles that I guess you can wrap cables around.

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Kevin's orginal design shows half the output devices.

Does leaving half the output devices unpopulated

change the sound quality of the amp if driving any normal headphone short of a K-1000 ?

If you happen to have a list of current requirements for all headphones minus a K-1000 I can try and answer that one for you ... otherwise, remember, there is no such thing as overkill in this hobby, especially in a Kevin Gilmore design :)

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If I might be so bold, those unwilling or unable to build should be prepared to offset the costs for the builders. The parts count doesn't look that high per board (less than 100).

Frack it.

n_maher - 4 - 0

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I'd say let's get a quote for those cases.

Looks like for an order with over four units the price is $85 for the 2U 300mm and $100 for the 3U 300mm. For some reason shipping costs are not shown when I add more than three to the cart. If shipping isn't free I would say add about $50 to the price. That's with current exchange rates.

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Maybe willing to pay for a couple boards in addition to my costs for the builders trouble.

I guess my offer to build doesn't count :rolleyes:

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