Pictures of your diy Pass amplifier

[CeeVee]

Man oh man this is getting really high level.

We are really getting some fantastic builds.

[Itsmee]

Originally Posted by jorgovanko

They are not purchased, my friend made them.

Looks like I'm going to have to wind my own.

Originally Posted by oj61

XA 50:4 It works since Dec. 2010.

• Transformer 1500W (seondary: 1x44VAC)
• 48VDC CLC => 8x10mF ->L L->8x10mF
• Stereo =>32x IRFP250N
• Total idle current: 7Amp DC
• Temp at the top: 55°C
• Cooling: Alu plate 2.5mm Complete: 1 square meter
• Top and down plate: 12mm

Your power amp is a work of art

[Zen Mod]

Originally Posted by Bksabath

....
About the coils what is the cooper lenght please?

Inductor Designer / Calculator

don't go above 0R22

[CeeVee]

Here you go...all done !

It seems that in this case we have 0R37 !

[Bksabath]

Tanks Zen
146 Feet but got loads of trubles converting that to meters
evvery time I got past a certain point I have to turn a corner and loose count.

And I am only size 7

Joke
right 50 meters shuld do nicely but calculator came up with 0.36 R
Had 2 on the mule cooper came by the kilo so I got 2 kilos and it was 2.5 mm square.
Not a blody clue of how meny henries and they look crap as right pain to bend and wind nicely.

PS tanks for calculator I sure it be handy.

PSS How do you mannage to find this stuff and remember where it is?

[Zen Mod]

Originally Posted by Bksabath

......

PSS How do you mannage to find this stuff and remember where it is?

that's famous Mighty ZM's Futile Attempts Method

now you can go nutz ..... old recipe :

"some data for my chokes (presumably 9mH, certainly 0E2 Rdc) :

EI72 package
height of package ~30mm
entire window filled with 1,25 enameled wire

air gap ~ 0,5 mm "

[Bksabath]

And Tanks CeeVee posting at the same time.

Looks like 50 meters is not that far off

[oj61]

Originally Posted by Itsmee

Looks like I'm going to have to wind my own.



Your power amp is a work of art

Yes , it was my intention. I would like to have no normal box.

[CeeVee]

Originally Posted by Itsmee

Looks like I'm going to have to wind my own.

Not Really....

Air core


By the way, the advantage of air core as opposed to ferrite core is that they have constant inductance irrespective of load.
Of course in a class A amp that argument is diluted because current is essentially
allways the same....well almost !

[oj61]

Some more pictures