Aussie Amps NX500NL

[AKSA]

As a kit there is limited quality control because of the workmanship, and thus results are not always predictable. There is also very considerable service backup.

Therefore the business model for kits is on the edge of viability, and so purchase of modules may be the only way to go if you want guaranteed high quality and warranty.

Cheers,

Hugh

[Workhorse]

Originally posted by AKSA
he knows mosfet cross-conduction and HF operation better than anyone else I've met.
Cheers,

Hugh

Hugh
Have a look at this thread and confirm who told Anthony about the exact phenomena of Cross-Conduction in Mosfet amps and also that his modules were suffering from Cross-conduction at HF

N-channel amp.

best regards,
K a n w a r

[djQUAN]

Originally posted by Workhorse


Hugh
Have a look at this thread and confirm who told Anthony about the exact phenomena of Cross-Conduction in Mosfet amps and also that his modules were suffering from Cross-conduction at HF

N-channel amp.

best regards,
K a n w a r

you may have told him but that doesn't mean everything he knows about it came from you.....he could have done some research (and experimenting) of his own.

[AKSA]

Kanwar,

I am sorry - I did not mean to discount your good advice!!

Your circuits have impressed me greatly, Kanwar, you are 1 very smart guy. That mosfet drive circuit is one of the cleverest things I've seen, up there with the NP-PMA concept.

However, I could crawl behind semantics and suggest that I have met Anthony - but I have not yet met you!!!

Ciao,

Hugh

[Workhorse]

Originally posted by djQUAN
you may have told him but that doesn't mean everything he knows about it came from you.....he could have done some research (and experimenting) of his own.

Mr. DJ,
I have used the word "TOLD" not "TAUGHT" in my previous post. which states clearly that i just describe Anthony that his modules were suffering from Cross-Conduction at HF.......
Quan you are dragging my statement towards wrong path, Stop this blasphemy.

Originally posted by AKSA
Kanwar,
I am sorry - I did not mean to discount your good advice!!
However, I could crawl behind semantics and suggest that I have met Anthony - but I have not yet met you!!!
Ciao,
Hugh

Hello Hugh,
You misunderstood my pevious post, i have no intention for disrespecting anyone.I hope we shall meet someday and have dinner together.
Cheers Major

[gaetan8888]

Hello Kanwar

Thank for refering to that link about cross-conduction, I've learn something very usefull about Mosfet amp.

http://www.diyaudio.com/forums/showt...189#post685189

Gaetan

[Workhorse]

[The Saint]

Hi Guys

It might be useful to point out that the cross conduction issue,
was only with one of my very early N-channel designs.
which used Hexfets. none of my other Hexfet amplifers or my current lateral MOSFET designs suffer from this problem.

[VHF man]

Mmm. The issue of cross conduction or gm doubling has had reasonable press in many forum threads so it's surprising that there's still a rather divided consensus of opinion.
In my playing with complimentary output stages I'm resigned to the fact that it can't be fully eliminated. However, it's my view that the resulting distortions are perhaps easier to deal with than pure crossover distortion, and perhaps even rail induced distortions.

One fact that seems to be ignored is that in the real world where a typical wideband musical signal is applied to a class AB amplifier, the large signal LF component serves as continuously varying bias signal for the more critical high frequency end of the spectrum. The implication of this is that the setting of a quiescent bias point is far more important for the reason of cross conduction than it is for crossover distortion.

However, let it not be ignored that a VAS with a very low output impedance is not that difficult to design and serves as a good way to eliminate most of the ill effects of cross conduction.
IMO, Attempting to reduce cross conduction or crossover distortion with elaborate temperature compensated bias generators is a big waste of time because it's virtually impossible to achieve at high frequencies which is where you really need it.

[diy2000]

Originally posted by jacco vermeulen
Would you believe that some people of this club are familiar with Anthony Holton's designs for well over a decade ?

JV
Brown Nose Industries.

in mid 90s anthony published a very good design in the australian
electronics magazine Silicon chip, so i know of him well over a decade, cool!, cheers