100W Ultimate Fidelity Amplifier

[masood251]

Dear sir please share me pdf of clip indicator and protector for AX14 amplifier. Thanks

 

[r_jik45]

My old Apex Ax-14

My old Apex Ax-20

What kind of psu are you using? Looks like there is nothing between the transformers and the boards.

 

[Astaro]

Yes, there is psu on each board. Here, for example, is the AX-20 board

 

[r_jik45]

@ Astaro
Thanks, go it!

 

[andrewlebon]

FH9HVX

Hello
greetings just finished FH9HVX on a single sided pcb .😉😉😉
Thanks to xrk971 for this lovely amplifier.

warm regards
Andrew

 

[prasi]

Hi Prasi
Any update on the Pcb's. Have you received it.

Regards

even after 2 months, the package is still in China. so I have applied for a refund on this order with pcbway.

 

[andrewlebon]

Hello Prasi
greetings is it possible to design single sided pcb for 2 pair version
warm regards
Andrew

 

[prasi]

Hello Andrew,
I will give it a go, but need some time. I think Sonal has already posted a 2 pair version if I am not mistaken
regards
prasi

 

[prasi]

100W Ultimate Fidelity Amplifier

this one is same as 2 pair FH-9? sonal has posted sprint file also somewhere on the thread.

 

[AdeS]

FH11 Ver1.02.zip, Sprint file for FH11.

"many thanks to sonal for his wonderfull pcb desigining and apex audio".

 

[carlmart]

Learn how to use PCB/Schematic drawing software is easy. But learn how to make good PCB layout is difficult.

As long as you keep connections between components short and thick, you will do alright. And do not use ground planes in amplifiers.

Using dual side pcbs is fine, because you will be able to shorten your connections between components.

These basic rules are a good way to start designing.

Add other tips you may find useful.

 

[asuslover]

I thought is better for a beginner to use ground planes .

 

[Astaro]

What are your thoughts, wishes, and tips?

 

[Astaro]

or are conventional enclosures preferable?

 

[Astaro]

Files for manufacturing in the archive.

 

[andrewlebon]

Q1/Q3 use c1845 low noise
Q2 USE KSC3503 see schematic # 13806

 

[Astaro]

Q2 USE KSC3503 see schematic # 13806

Is it so heated there that a large form factor is needed??

 

[andrewlebon]

its not a heat issue c1845 are very low noise trs.

 

[Astaro]

bd 550/560 are also considered a little noisy, right? but why put q2 like that 3503?

 

[DaveFred]

Hi Nick,
here are the files🙂. be very careful in soldering as components are in close proximity due to compactness of pcb.😉

Another thing, if you want quickly the pcbs for this amplifier but different pcb design/size, xrk 971 has already his version of pcb in his store , have a look at GB section or his store here FH9HVX Amp PCB | Etsy

regards
prasi

What is the recommended transformer size for 4 or 8 ohm?