F5 Turbo Circuit Boards

[AndrewT]

you can't have +- AC voltages.
what do you actually have?
A DC, or dual polarity DC, or AC, or dual AC?

 

[naniking]

you can't have +- AC voltages.
what do you actually have?
A DC, or dual polarity DC, or AC, or dual AC?

Because my power transfomer output have daul AC 35-0-35, So hwen i apply to F5 circuit, after regulator, DC have +- 48V , so how can i do?

 

[AndrewT]

That's better, Now you make sense.
I shall re-state and you can tell us if that is correct.
Transformer is 800VA 35 +35Vac
Rectified output on your mains supply is +-48Vdc when on zero load (open circuit).

Or, you have a two channel regulator to bring the voltage down to 48Vdc?

The F5 runs on +-25Vdc

 

[AudioSan]

with 800VA +/-48V DC you can build one ch turbo V3.
or 2 ch V3 with a little low bias.

 

[naniking]

Thanks all of everyone.

I know the F5 tubo v2 circuit is opearated with +- 32Vdc.

On my hand, i have one transformer which is attached here.

that is reason why i am not sure this transformer can use or not.

If can use it, how can i do.

Thanks a lot.

 

[buzzforb]

Yes you can, but you will either need large sinks or lower output bias. Its all about implementation.

 

[AudioSan]

he will need big sinks AND lower bias😀
200W dissipation pr ch in a stereo amp chassis. that takes some sinks🙂
and bias at 2A. maybe a 3pair version is the best way.

 

[naniking]

Yes you can, but you will either need large sinks or lower output bias. Its all about implementation.

Could you draw a circuit for this implement?

Let me know what components I need to buy.

Thank you.

 

[AudioSan]

what???

 

[6L6]

Could you draw a circuit for this implement

Nelson Pass has already done this -- you should build an F5turbo v3

http://www.firstwatt.com/pdf/art_f5_turbo.pdf

The voltage of your transformer will prove to be no problem.

 

[naniking]

Nelson Pass has already done this -- you should build an F5turbo v3

http://www.firstwatt.com/pdf/art_f5_turbo.pdf

The voltage of your transformer will prove to be no problem.

Thx. I will made F5 turbo V3.

Other things, Could i use Hitachi 2SK135/2SJ50 to replace FQA12P20/FQA19P20 ?

On my hand have 12 pcs per each Hitachi FET

 

[AndrewT]

The Hitachi are Lateral devices.
Read up on the comments from Members on altering the F5 to lateral outputs.

 

[vdi_nenna]

Hi Everyone,

Hope I'm not bringing up a sore subject, but how are the F5T boards coming along?
Any plans for mono block boards?

Also, if you were to make a F5T board for mono blocks, how would boards be configured?
For instance, if you are using a standard case with heat sinks on each side, how would the boards be configured? Would you use an input/driver board attached to the base plate and feed power and signal to output boards via wire or a single board spanning the space betweem heat sinks? One board would lock you into a particular sized case, right?

Thanks,

Vince

 

[AndrewT]

All the F5 PCBs I have seen on the Forum are for single channel.

There are none that are for stereo.

 

[vdi_nenna]

In other words, single heat sink. Ok thanks.

 

[AudioSan]

here are F5 turbo boards🙂 front end and dual output boards.

 

[vdi_nenna]

Whom does one see about acquiring such boards? 😉

 

[AudioSan]

those are (allmost) the boards that will come in the store.
as far as i know, the output boards will be split in 2.
this is the UKToecutter's prototype turbo V3 boards.

 

[vdi_nenna]

Great. Will keep an eye on the store.

 

[a.wayne]

those are (allmost) the boards that will come in the store.
as far as i know, the output boards will be split in 2.
this is the UKToecutter's prototype turbo V3 boards.

I thought you were going to build and give feedback ...? what ever happened to toeC ?
Knowing what i know now i should have taken those boards from Toe ,,,