irfp250 application

[sakis]

i have a quite big ammount of IRFP250 mosfets that originally were ment to be parts of the LEGEND 4 amplifier that i tryied to construct some time ago .....

since this application didnt actually work i wonder if anyone can point to me any schematic that uses these devices presumably a quasi or anything similar ....

doesnt really have to be powerfull just working will do

thanks

[andrewlebon]

dear sir
greetings irfp 250 can be used in dr boras legend 500
watt amplifier instead of irfp240.
thanking you
andrew lebon

[sakis]

but i will not construct anything from Bora in the feature

My applications have to be simple and debugged .My amplifiers in the feature might be abused so i dlike to have something constructed that doesnt ''leak " from anywhere

I will go for a balance between safety and performane Legend 4 amplifier could not provide me this and i am afraid the designs from the same designer might have similar issues IE might sound amazing but not ready to be abused if required .

also i am afraid that this is not only bora's way of design ...I ve seen other circuits here that have similar issues

if you require a defination of the word abuse i will be more than happy to explain

thank you very much

[Lumba Ogir]

Sakis,
I have the genuine pleasure to suggest this balanced topology probed by Tanaka-san and other honorable Japanese designers.

[Lumba Ogir]

This one:

[destroyer X]

Have you built this Tanaka amplifier Lumba?

What have you done to reduce distortion?

Do you have a link or some paper about it?... any adress to help me to undertand the designer proposal...maybe he is saying 2 percent is not a bothering thing....he may be rigth.

Sorry Sakis... i was curious about this one.

regards,

Carlos

[Lumba Ogir]

Carlos,
I`m sorry for being unclear, this is just a popular topology in Japan.
You could try to make the stages more linear by using cascodes, CFP and separate power supply for the input section

Distorts a lot Lumba!... around 2 percent at 15 watts RMS

No problem as long as it is below 10%.

Do you have a link or some paper about it?

Do you understand Japanese?

[destroyer X]

send me the link dear Lumba.

regards,

Carlos

[destroyer X]

to 0.05%

So...will assemble and listen.... i am always searching for big magic..even knowing big magic does not exists..but this is the real fun... will never finish, as i will never find the one... it does not exist.

Speakers are the limiting factor.

regards,

Carlos

[Lumba Ogir]

Carlos,
sorry again, no link at the moment. What output devices are you gonna use?