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 🙂

 

[Antealta]

it is a live, some fine tuning left

 

[Zen Mod]

 

[Zen Mod]

 

[Jacruzer787]

it is a live, some fine tuning left

What’s the pcb and smps in the front for?

 

[Antealta]

it's a soft start, and a power supply for dc protect (not in use). is the same case i use for my F6

 

[Antealta]

not too shabby

 

[SeeRockCity]

Sorry if this has been discussed, but I've been following this thread closely and I haven't seen any chassis recommendations now that the Modus custom is no longer available for pre-order. I missed the window due to having no money in my fun fund 🙁.

Anyone find anything comparable? Not sure I'm happy with the idea of a blind order from Alibaba.

I think someone mentioned the generic 4U aluminum from Modushop. Any other options?

 

[birdbox]

Modushop Dissipante 4U/300 Deluxe and the 5U/400 Deluxe both work great and there's even a sale going on right now. I've built two Aleph Jzm's in the 4U/300 Deluxe chassis. Works great.

 

[Gianluca]

Sorry if this has been discussed, but I've been following this thread closely and I haven't seen any chassis recommendations now that the Modus custom is no longer available for pre-order. I missed the window due to having no money in my fun fund 🙁.

Anyone find anything comparable? Not sure I'm happy with the idea of a blind order from Alibaba.

I think someone mentioned the generic 4U aluminum from Modushop. Any other options?

You may get lucky and once we finish producing them a couple extra ones could be available. That's an information that unfortunately I do not have at the moment but I'll make sure to keep you updated

 

[SeeRockCity]

Modushop Dissipante 4U/300 Deluxe and the 5U/400 Deluxe both work great and there's even a sale going on right now. I've built two Aleph Jzm's in the 4U/300 Deluxe chassis. Works great.

That's perfect. I will probably end up with that option unless Gianluca has a spare or two available when the dust settles.

Thank you for the input!