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Old 13th December 2015, 04:38 PM   #5711
rsavas is offline rsavas  Canada
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Yup, Terry's the AMP MAN!!
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Old 14th December 2015, 01:23 AM   #5712
still4given is offline still4given  United States
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Default AX16 Singing!

Hi Guys,

It's singing! You may notice in the picture that I didn't put the 100n caps on top of the boards. I was running low on 100n film caps so I decided to use X7R SMD caps on the bottom right next to the elco caps they were decoupling. Worked great and was very easy due to the tight layout.

I have only listened to it through my test speakers so far but it sounds very good so far. I'll hook it to my big A/B setup tomorrow and give a more detailed report. I'm posting some pics of some square waves for your enjoyment.

Blessings, Terry
Attached Images
File Type: jpg AX16 SINGING.jpg (608.1 KB, 2032 views)
File Type: jpg AX16 foil side..jpg (740.9 KB, 1874 views)
File Type: jpg AX16 1KHZ.jpg (87.5 KB, 1651 views)
File Type: jpg AX16 10khz.jpg (97.0 KB, 1556 views)
File Type: jpg AX16 20khz.jpg (92.8 KB, 1529 views)
File Type: jpg AX16 50KHZ.jpg (97.6 KB, 302 views)
File Type: jpg AX16 100KHZ.jpg (93.6 KB, 288 views)
File Type: jpg AX16 CLIPPING.jpg (93.9 KB, 299 views)
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Old 14th December 2015, 04:55 AM   #5713
SoundsGreat is offline SoundsGreat  India
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Hi,

Quote:
I have only listened to it through my test speakers so far but it sounds very good so far. I'll hook it to my big A/B setup tomorrow and give a more detailed report. I'm posting some pics of some square waves for your enjoyment.
Thanks for the report,Looking forward to the complete analysis.Please be as elaborate as possible when posting your findings.

Regards.
__________________
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Old 14th December 2015, 12:27 PM   #5714
bimo is offline bimo  Indonesia
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Quote:
Originally Posted by still4given View Post
Hi Guys,

It's singing! You may notice in the picture that I didn't put the 100n caps on top of the boards. I was running low on 100n film caps so I decided to use X7R SMD caps on the bottom right next to the elco caps they were decoupling. Worked great and was very easy due to the tight layout.

I have only listened to it through my test speakers so far but it sounds very good so far. I'll hook it to my big A/B setup tomorrow and give a more detailed report. I'm posting some pics of some square waves for your enjoyment.

Blessings, Terry
Q1 and Q5 should thermally couple, Q2 and Q4 too.
Q8 and Q9 is safe without heatsink, but add a small heatsink is cool
The bias current is about 110mA.

Part type recommendation:
C2, C6 and C7 is ceramic NP0/COG or silver mica.
C1 and C8 is MKP.
The 1/4watt and 1/2watt resistor is metal film, but choose high quality for R13 and R15.
R32 and R33 is low inductance type.

I wait the A/B result....
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Old 14th December 2015, 03:47 PM   #5715
still4given is offline still4given  United States
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Quote:
Originally Posted by bimo View Post
Q1 and Q5 should thermally couple, Q2 and Q4 too.
Q8 and Q9 is safe without heatsink, but add a small heatsink is cool
The bias current is about 110mA.

Part type recommendation:
C2, C6 and C7 is ceramic NP0/COG or silver mica.
C1 and C8 is MKP.
The 1/4watt and 1/2watt resistor is metal film, but choose high quality for R13 and R15.
R32 and R33 is low inductance type.

I wait the A/B result....
Seems these things should have been mentioned BEFORE I built it. It is what it is now.
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Old 14th December 2015, 05:01 PM   #5716
still4given is offline still4given  United States
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Is this AX16 an APEX design? It is in APEX thread and named a typical APEX name but I don't see where Mile posted anything about it.
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Old 14th December 2015, 05:07 PM   #5717
bimo is offline bimo  Indonesia
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Quote:
Originally Posted by still4given View Post
Is this AX16 an APEX design? It is in APEX thread and named a typical APEX name but I don't see where Mile posted anything about it.
It is Apex design: 100W Ultimate Fidelity Amplifier
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Old 14th December 2015, 05:08 PM   #5718
bimo is offline bimo  Indonesia
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Quote:
Originally Posted by still4given View Post
Seems these things should have been mentioned BEFORE I built it. It is what it is now.
I'm sorry. You are too fast for me...
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Old 14th December 2015, 05:45 PM   #5719
still4given is offline still4given  United States
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Quote:
Originally Posted by bimo View Post
That link doesn't work but I did a search and now I see that the AX16 is just the AX14 with two transistors added to form a protection circuit. However, you removed those two transistors so what you have presented here is a modified AX14 which I had already built and tested. Looks like you removed a few parts and added a trimmer to adjust the offset. I don't recall the original having any offset issues I will have to read back through my build.
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Old 14th December 2015, 08:01 PM   #5720
sonal kunal is offline sonal kunal
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Hi bimo can you simulate AX30?

Regards
Sonal Kunal
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