Updating an old Rotel RA820A to use HEXFETS's amongst other mods :)

[NMOS]

against asymetrical clipping...Is this an Quasi Mosfet AMP ?

normally complementary amp clip not asymetrical

 

[big jim]

Is this all a big joke.



jim

 

[Mooly]

against asymetrical clipping...Is this an Quasi Mosfet AMP ?

normally complementary amp clip not asymetrical

A quasi amp uses two similar devices for outputs such as two NPN's or two PNP's (or FET's) .

The Rotel is a common push pull complementary configuration.

 

[Mooly]

Is this all a big joke.



jim

Evening Jim 🙂
This and some other threads have stopped triggering the notifier for some reason...

 

[ilimzn]

Hi ilimzn... thanks for the interest and observations. I realise such a basic design as this is capable of many tweaks and alterations, and your suggestions re the input stage are very valid.
It was all just done as a bit of fun rather than trying to turn it into an "audiophile amp".

thanks 🙂

Oh, I know, but it's even more fun if it ends up working really well while keeping it simple... and some of these simple amps actually show how far you can get with the KISS philosophy.

 

[big jim]

Its all a big joke
mooly can you tell us what amps that you have designed thats on the market
To say that 80 mv offset is appaling.is a joke Rotel must have made thousands of them



jim the notifier.

 

[Mooly]

Its all a big joke
mooly can you tell us what amps that you have designed thats on the market
To say that 80 mv offset is appaling.is a joke Rotel must have made thousands of them



jim the notifier.

It's an old budget design, and by todays standards (and my standards) 80 mv is not acceptable.
I haven't designed any amps commercially, only for my own satisfaction.

This one holds the offset to around 0.3mv,

http://www.diyaudio.com/forums/solid-state/119151-my-mosfet-amplifier-designed-music.html