F5 Turbo is posted

[MASantos]

I have a few questions about the v2 version:

what sort of power output could we expect into 6ohm speakers?
What would be an appropriate transformer rating for such output?
If mounting the 4 output devices and the 2 "double" diodes in one heatsink, what w/c value should one look for?

 

[Spooky Electric]

Oh, the article is out! Thank you very much! 🙂

 

[6L6]

So let me ask a question about configurations --

I am trying to use higher voltage transformers, but am not concerned about ultimate power output. My transformers are 49v-0-49v

Can the v3 version be used as drawn with only 2 or 3 output pairs? The heatsinking required with the 4 pairs seems to be huge.

 

[Michael Rothacher]

Another classic. Fun, fun, fun. Thanks.

 

[ra7]

F5c boards ordered 😀

 

[george a]

Many Thanks Papa!!!

Is this , Particularly the V1 version, the beast with which i can drive my 0.1 ohm Ribbons speakers direct - ie no transformer?

I see in the article the pictures of a 0.1 ohm being driven with high current...

many thanks

 

[a.wayne]

.1 😱 forget about it , anything below .6 kills the sonics ..... 🙂

 

[anilva]

Thanks

Thanks Papa for the Turbo. It's been a long time since I read an article with such concentration and passion. Didn't want to miss a word.

Well next few months, if not years are going to be busy with these builds. Need to figure out a source for Fairchilds.

Cheers.

 

[a.wayne]

Turbo F5 V3 for heeeeevaaar !!!!!!!!! balanced ........🙂

 

[labjr]

Very interesting reading. Thanks for such an elaborate and thorough manual.

I noticed a couple of changes to the F5 circuit. R17 & R18 are now 100 ohm. And the gate resistors are 100 ohm. I have boards which I built last year. I guess it's not cricital to change those resistors? I don't want to risk my nicely assembled boards.

Thanks again

 

[vizion]

FIRST WATT ARTICLES

 

[Audiofanatic]

F5 Turbo !

😀


Audiofanatic 😉

 

[bear]

Well, clearly this stuff can't possibly be any good - too many parts!

Get rid of some of them like in an F5, and maybe the guy who came up with this stuff might, maybe, have something going on!

Imagine the impunity to suggest a 100watt amplifier!

Well, that says it all right there.

_-_-bear

 

[CENTRAL]

Wow! All this building flexibility will bring huge interest and endless discussion!!! Which one will be crowned KING ???

 

[JBL4435]

New Boards at DIYAudio store?

Thanks for the article Nelson!

Will there be new F5 Turbo V3 boards available at DIYAudio Store?
Shouldn't we open a new thread for the F5 Turbo?

 

[Gyuri]

Thank you,Papa!
It is a very enjoyable reading as always, despite my crappy english.
You're my light in the night.😎
Wacky Gyuri

 

[UKToecutter]

Nelson,
Very Nice, thank you.
I think the F5 v2 will be my first 'sand' build.

 

[AuroraB]

Impunity may be one thing, - the supply situation of FQA19N's and 12P's may solve that easily - or are the other versions of FQAs concidered direct replacements ( max current concidered.. ) ?

 

[CENTRAL]

Thanks for the article Nelson!

Will there be new F5 Turbo V3 boards available at DIYAudio Store?
Shouldn't we open a new thread for the F5 Turbo?

This is a valid claim!

Given the popularity of the F5s I think there should be a seperate topic for each: F5 classic, F5 Turbo V1, F5 Turbo V2 and V3.

Builders would be helped to focus in that way...

 

[umut1001]

Lets build and compare the sounds 😀 I am sure some fanatics built them in a few hours 😀