New Hifisonix KX2-Amplifier

[Bonsai]

Thank you

 

[Gvida]

OK

View attachment 1127852 View attachment 1127855

 

[Gvida]

@oloppolo hi pelasse can you vive the size of the case you used for the ksx ?

 

[oloppolo]

Modushop. (Italia)

 

[Gvida]

Thanks, how it is warm when running in class A?

 

[Bonsai]

That will run about 50-55C.

Thats a good chassis for the Kx2 👍🏻

 

[mz543578854]

Hi @Bonsai , have you ever shared the spice file? A am not able to find it in the thread or on your website.
Thanks, Mo

 

[Nico Ras]

Nice one Andrew!

 

[Bonsai]

Hi @Bonsai , have you ever shared the spice file? A am not able to find it in the thread or on your website.
Thanks, Mo

Hi Mo, I'll put it up in a day or two - I'm tied up for the minute.

 

[Bonsai]

Hi Mo,

LTSpice files for the kx2-Amp have been added to the first post in this thread.

 

[mz543578854]

LTSpice files for the kx2-Amp have been added to the first post in this thread.

Great, thanks!

 

[Bonsai]

I’ve updated the first post with an advisory on the driver devices as follows:-

The KSC2690 and KSA1220 driver transistors have been discontinued by ON and are no longer available from reputable distributors like Mouser and Digikey. However, this is no problem for the kx2-Amp. Simply replace Q10 with a KSC3503 and Q11 KSA1220 with the KSA1381. These are the same devices used in the amplifier VAS stages but work perfectly as drivers in the kx-Amp without modification or change in performance.

 

[oloppolo]

Hi Bonsai, I built kx2 and am very happy with it. I had started building two kx boards before the kx2. I would like to complete kx but I don't have large heat sink. What value of R1 do I need for AB bias in kx? I am very grateful for your work.

 

[Nico Ras]

Prosperous new year, Andrew and his followers!

 

[Bonsai]

Thank you Nico - happy new year and best wishes for 2024!

 

[Bonsai]

Hi Bonsai, I built kx2 and am very happy with it. I had started building two kx boards before the kx2. I would like to complete kx but I don't have large heat sink. What value of R1 do I need for AB bias in kx? I am very grateful for your work.

Hello Oloppolo , let me come back to you a bit later this week. Thank you for your kind comments

 

[oloppolo]

Prosperous new year, Andrew and his followers!

Happy new year!

 

[thimios]

Happy New Year to all of you!

 

[kedar110]

Hello Bonsai,
I have these transistors MJL1302A/MJL3281A. Can I use them? Will there be any difference?
NJW1302 /NJW3281 out of stock

 

[oloppolo]

Is Bonsai missing?