Post your Solid State pics here

[still4given]

😉 Doesn't matter it has a lot of total capacitance. The amplifier has a +-55V , maybe smaller voltage supply.

Lower voltage is OK but don't believe the 100V label. There is a reason you will only find these caps on ebay.

 

[still4given]

Sorry, I only saw this Question right now.

Here is a link to the errata doc covering both amplifiers and PSU +Protect

Updates and Errata – nx-Amplifier | hifisonix.com

I just built a second nx-Amp 2 weeks ago with Jims Audio boards and the updates per the errata sheet. Works perfectly.

Uncharacteristically, I am going to blow my own trumpet here: this is an awesome sounding amp (I'm using B&W 703's, my X-Altra mini preamp and an Oppo BD-103 player).

Power transformer is 500 VA, with belly band and inter winding screen.

I will attest to the superb sound of this design. I just finally wired all three boards wired up the way they were intended and listened to it all day. Wow! I actually hooked mine up to the scope and an 8R dummy load and I'm getting 120W with +-50V rails. Very clean Square waves all the way to 100mhz. Thanks for staying with it and getting the circuit working with the new boards.

Blessings, Terry

 

[Bonsai]

Wow! I am so glad to hear you got everything completed Terry and you are happy with the sound.

My thanks to you and Bill_P for your patience. With your input as builders, this is a better amplifier.

 

[arifs]

not even entry class beauty , but here is my way of doing things when i was unable to find it easy to print on pcb. Used veroboard and made design on paper to remember things. These are 3 channels using old 2SD313 2N5401 and 2n555. Giving approx 50 watts of power on +/-40 supply. going for 5.1 setup. If i got time after this one will go for better designs.

 

[Bigun]

Looks marvellous - I love the method used !

 

[still4given]

That's really cool! Can we look up her dress?

 

[jacco vermeulen]

I love the method used !

It can be seen in some old gear.

(Terry, you naughty boy)

 

[greierasul]

Finished amplifier 😀

THD and IMD for SARA amplifier...

 

[AndrewT]

I can't read the THD due to the dominance of mains harmonics out beyond 6kHz.

 

[pinnocchio]

Thank you all for comments ,and realy sound very clear ,no hum , hiss ,buz . I'm glad I have built 🙂
My speakers are Taga Harmony Platinum F-120, and more pictures

Really nice job! clean layout and well executed!

Congrats!
Do

 

[greierasul]

I can't read the THD due to the dominance of mains harmonics out beyond 6kHz.

THD aprox 0.0002% ; THD+N is obviously bigger, 0.001% if I remerber...

 

[greierasul]

I was re-routing the cables inside the chassis, I was finding new position for the transformers and the noise going down a lot. After new measurements, we have a new results. Real THD at 1khz it is almost like in simulation, except 3th harmonic wich is generate in over 90% from measurement sistem. IMD-( 19khz+20khz ) with 1khz related product it is smaller then the noise. In simulation that product it is at -139dB from the 19khz+20khz signals.

In first photo it is the measurement sistem THD, in a second photo it is a THD of a measurement sistem + SARA power amplifier at 80W-8ohm.

 

[apexaudio]

APEX SR200

 

[apexaudio]

APEX B600

 

[east electronics]

well done Apex !!! really neat !

 

[apexaudio]

B500 dual mono

 

[arifs]

6 channel (5.1) amplifier

This is my "Jugaad Amplifier". Jugaad is an Asian word for "an innovative fix or a simple work-around".


Speaker protection circuits with relays for all six channels. working fine in initial tests and simulations.


6 channels amplifiers (no awesome pcb here therefor Jugaad )

Work in progress:
Hefler matrix and switching circuit for various modes.

 

[vdij]

Natali PRO, H-klasse 500+500W, +50/100V, speaker protection, thermal protection, temperature indicator, clip limiter.

 

[masood]

This is my "Jugaad Amplifier". Jugaad is an Asian word for "an innovative fix or a simple work-around".


Speaker protection circuits with relays for all six channels. working fine in initial tests and simulations.


6 channels amplifiers (no awesome pcb here therefor Jugaad )

Work in progress:
Hefler matrix and switching circuit for various modes.

nice jugaad amplifier kit

 

[Bigun]

Natali PRO, H-klasse 500+500W, +50/100V, speaker protection, thermal protection, temperature indicator, clip limiter.

Looks like a lotta power in a small case - impressive !

Interesting use of an older speaker frame to hold your toroid 😛