Aleph Jzm

[Zen Mod]

as that, no need for any resistor changes, except upping value of 3W resistors

say that 0R39 (in place of 0R27) will get you to desired lower Iq

you can stay with IRFP240, considering lower dissipation, but double xconductance of IRF150 will bring lower THD

 

[lykkedk]

you can stay with IRFP240, considering lower dissipation, but double xconductance of IRF150 will bring lower THD

I see... Nice.

(I only use two IRFP240'S and not 4 as pr. the original AlephJ schm. on the Mimi, you remember ZM?)

Thx. for the explanation

Jesper.

 

[Zen Mod]

fact is that - whatever number of mosfet pairs, when you make sum of xconductance, using double means 6db decrease in overall THD

if no other changes involved

 

[lykkedk]

Which one of them IRFP150 are used in the BOM, there are some slight differences between them...

Do not overthink this Jesper

 

[Zen Mod]

Do not overthink this Jesper

 

[TungstenAudio]

Then there are devices such as the FQA28N15 and IXTQ36N30P.
Even more better.

 

[Zen Mod]

I'm going to build my Aleph with VT4C in output, as soon I find original Aleph case

I'll put original top panel aside and make new one, with 4pcs of VT4C proudly on

 

[ItsAllInMyHead]

 

[rhthatcher]

Ah, the porcupine amp. My old Aleph 3 is what started me down this journey into Pass-land. Why did I sell that one?!?!?!??

 

[stajo]

I'm going to build my Aleph with VT4C in output, as soon I find original Aleph case

I'll put original top panel aside and make new one, with 4pcs of VT4C proudly on




View attachment 1329568

View attachment 1329569

Tungsten filaments, nice glow