Pictures of your diy Pass amplifier

[KweeSong Lim]

Dear vdi_nenna, thanks for the pointer. Will try again.

Song

 

[blackdod]

Nice amp!!!!

 

[KweeSong Lim]

My new Aleph X

Trying again to upload pic. With DiyAudio boards I purchased from a fellow member recently.

Will upload more pics if this upload is successful.

Song

 

[KweeSong Lim]

My Aleph X

More pictures. Three pairs mosfets per quadrant, 1 A bias per mosfet. 1kVA transformers, +/- 25v rails. Total 352,000uF per channel. CRC. Red coil is 30 turns of copper wire about 0.1 ohm.

 

[KweeSong Lim]

My Aleph X

More picture here. 352,000uF per channel in double tiers construction.

 

[KweeSong Lim]

My Aleph X

CRC arrangement. Coil is 0.1 ohm. Oops I cannot upload pictures further. Have I hit my max allowable?

 

[KweeSong Lim]

My Aleph X

More picture

 

[KweeSong Lim]

My Aleph X

1KVA, 18v secondary

 

[KweeSong Lim]

My Aleph X

All wired up.

 

[KweeSong Lim]

My Aleph X

Powered up. LEDs serve as power rails indicators and also as bleeders.

 

[KweeSong Lim]

My Aleph X

Closed resistors and mosfets matching enabled very low offset relative DC.
Readings: left to right. Differential pairs drain resistors voltages followed by absolute DC and lastly the relative DC of about 1mV.

 

[MASantos]

Really cool build! So you have 6A of bias per side? :O :O :O

 

[KweeSong Lim]

Yes. 6A per side.

 

[folkdeath95]

What a beast!!! Great work.

 

[damuffin]

More picture

Nice Slinki's

 

[efragnani]

JBoz

Here is my JBoz premp construction. Thanks to my friends "Thiagomogi" and "Cantunes", for the mini group buy and informations.

Enjoy.
Thanks.

 

[efragnani]

More pics

More pics 😀

 

[efragnani]

... and more 😀

... and more pics 😀

 

[KatieandDad]

Is that a steel bolt going through the centre of your transformer. connecting a full turn though the metal jacket of the same and the metal chassis ?

If it is you have a perfect shorted turn which will destroy your transformer in no time at all.

 

[WalterW]

efragnani, I like it very much !