F5 Turbo Circuit Boards

[sangram]

This went from simple to complex very quickly

Has no one considered two monoblocks with sinks on the front? That's 17" wide and doesn't need to be deep at all. Can route the input and output to either the rear, sides or (in my case) the top.

I am glad to see the V2 is still one board. That's the one I'll be interested in, if it's still around when the GB goes live.

My case is about 14" wide x 5" tall with the heatsinks mounted to the front of the case. The sinks themselves are 10"(h) x 7 (w)" so the front of the sink (where the fins are) rises 5" above the case top, I used one per channel in the original F5 and got a ~30 degree differential in Indian summer. Planning on two per channel with a copper heatspreader, stuck side by side to create a 14" wide case. I just need a little more gain and a little more power, so the V2 is spot on for my requirement. I/O terminals for each monoblock are on the case top.

[jernejc]

Hey, Is there allerady some universal PSU PCB done which can be used for any of the F5? Need two of them to power up my dual monos.
Jernej

[rdk845]

Wow, Over the weekend I was thinking that "there is no way that I could make V3 other than monoblock even for the starters, should I back out of the board GB?"
Then boom the thread exploded. I'm very happy to see what V3 boards has become. I gotta love this community!.

It really isn't much more complicated. Actually, I'm in more of camp prefering wiring individiual mosfet off from board so that builder can use whatever heat sink combination they want. For example, I'm currently considering using 4 of those semikron heatsinks per channel for each monoblock. But width of 2 semikron heatsink would be 250mm. So if the output board is 250mm long, it could be slightly too long.

As for those who are concerend about cost of monoblock, I think this V3 turbo version is going to provide a performance that couldn't be generally found in DIY audio community before. If properly built, it could legitimiately compete with multi 10K high power solid state amplifier driving multi 10K or even more expensive main stream speakers. I'm trying to build a 100W class A amp to drive my b&W matrix 800, but would eventually build it into 300W class A amp to drive full range electrostatic speakers. I would spend $1K more if neccessary, to build one properly with room for enhancement.

Thanks for the great work Toecutter.

[jacco vermeulen]

Originally Posted by rdk845

I think this V3 turbo version is going to provide a performance that couldn't be found in DIY audio community before.

Indulge me, why is that so ?

[UKToecutter]

Originally Posted by 6L6

Toecutter -- What are the dimensions of the boards?

6L6

The board dimensions are as follows;

V3 Output Board 250mm x 50mm
V3 Input Stage 70mm x 70mm
V2 Combo Board 250mm x 50mm
PSU Board 163mm x 152mm

[UKToecutter]

Originally Posted by a.wayne

Andy ,

That's 4 boards /ch for a v3 .....?






Sweeeeet .............. V3 lives !!!!!

2 board + 1 input stage / Ch

[UKToecutter]

Originally Posted by JBL4435

Wonderful work Andy.
Not necessarily split N & P boards. I would just use 2 of your output boards in parallel.





V3 per channel: 2x Output board, 1x 1st Stage Board, 1 PS board. Preferably in one mono block

V3 stereo: 4x Output board, 2x 1st Stage Board, 2 PS board. Preferably in two mono blocks

V3X per channel: 4x Output board, 2x 1st Stage Board, 1 PS board. Preferably in one mono block

V3X stereo: 8x Output board, 4x 1st Stage Board, 2 PS board. Preferably in two mono blocks

Oh...
V2 stereo 2 x V2 Combination Boards and 1 x PS board. Stereo chassis is ok

For checking the layout and schematics there are better experts here.

Any news from Papa regarding his OK?

Yes indeed,

If you wanted to add additional boards for more output devices I guess you could.

Papa is OK as long as I don't use his name or FirstWatt on the boards.

[rdk845]

Originally Posted by jacco vermeulen

Indulge me, why is that so ?

O.K. I meant "generally" couldn't be found in diy audio community. Of course I'm sure many have built word class amplifiers for their own, but F5T would probablly easier and presumably will be much more popular than those inidividual build.

[lhquam]

Has anyone considered a 3-MOSFET per rail version of the F5-Turbo? It could probably me designed to the exactly the same FET spacing and board dimensions of the BA-CO v2.0 Burning Amp Complementary Output Board, or the F4 V2.0 board. This would allow its use on 10 wide heatsinks like the HeatsinkUSA E007.

Just a thought.

[lhquam]

Originally Posted by a.wayne

Andy ,

That's 4 boards /ch for a v3 .....?



Sweeeeet .............. V3 lives !!!!!

How about a simple modification to the V5-Turbo V3 Output board that would allow it to have 2 N-ch and 2 P-ch MOSFETS? Cut the gate drive trace and the power trace in the middle of the board and add jumpers for the "normal" 4-of-the-same-kind use.