F5 power amplifier

[Goffe]

This is my layout and no extra componets added.
resize to 82.8x34.4mm in your printer setup.

 

[Goffe]

Componets placement.

 

[Goffe]

This is the schematic.



Regards

 

[vdi_nenna]

Very cool Goffe!

Thank you!

Vince

 

[Nelson Pass]

This is the schematic.

Hey! That looks like my amp!

 

[seventenths]

Hey! That looks like my amp!

Weird huh?

 

[Variac]

Juma, very nice board design . Visually it expresses the simplicity of the circuit well, and as you mentioned, it seems to have all the requirements of those of us commenting, and that's hard to do

Maybe someone will do a board run, but it is even better that lots of people seem to be making their own boards!

Mark

 

[udailey]

I wish I had a lot to contribute, but this far in my DIY career I am just a copy cat
Thanks to Mr Pass and all the rest of you making this easy for the rest of us. I really appreciate it. (course I still have to build it. Probably in July)
Uriah

 

[Nelson Pass]

I started out as a copy cat too.

 

[thomasfw]

Did anybody noticed that in the close up picture in post #926 at the top of this page Nelson added a 2.4 ohms resistor in parallel to the 0.47 ohm source resistor of the Nch mosfet (Q4)?
Moreover, the gate resistor seems to be 150 ohms in lieu of 47 ohms indicated in the published schematics. (Assuming that the left hand resistor close to the gate is R14)

A special tweaking or........???

Who know the answer,please ?

 

[Blues]

Looks like Nelson decided 1.5A sounds better than 1.3A.

 

[Skorpio]

Who know the answer,please ?

2.4R in parallel probertly gives te best balance in current and you might mix the gate resistor with the 150R used for current limiting...

 

[juma]

... it is even better that lots of people seem to be making their own boards!
Mark

Of course !
"Do It Yourself !" said the burning bush (it was on the second tablet - the one that Mel Brooks dropped)

 

[GuidoR]

"Do It Yourself" and share your job...
Here my (very modest) contribute to the cause.
The program is the well-known ExpressPCB.
The imagine (copper side) is reversed, so is perfect for "laser printer and iron" technique.


Guido

 

[Nelson Pass]

2.4R in parallel probertly gives te best balance in current and you might mix the gate resistor with the 150R used for current limiting...

The 2.4 ohm resistor was used to trim for lowest distortion, which I
do if the channel exceeds .005% at 1 watt. As I have said, you need
an analyzer to be able to do this. A minority of channels need this,
and it is random in value and placement.

 

[Goffe]

Hey! That looks like my amp!

If the Zen Master says so I supposedly that I drawed the circuit right

 

[rubydac]

Thanks Mr.Nelson (again)

After I success full with Aleph J now I used GOFFE's model to be my next project of F5

 

[thomasfw]

Will ZTX450 more stable in compare with using MPSA18 ?

 

[Babowana]

Will ZTX450 more stable in compare with using MPSA18 ?

They would be sleeping, probably over the life of F5 operation...
Forget their stability, grab any one and use it...

 

[FaTTy]

Hi
Is the pair of 2sa970/2sc2240 will be a good replacement for ZTX450/ZTX550?