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Shanti Dual LPS 5V/3A , 5V/1.5A
Shanti Dual LPS 5V/3A , 5V/1.5A
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Old 21st October 2020, 01:38 PM   #1861
cdsgames is offline cdsgames  Canada
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I have started a thread for Boss2 on moodeaudio

Last edited by cdsgames; 21st October 2020 at 01:42 PM.
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Old 21st October 2020, 03:36 PM   #1862
grubyhalo is offline grubyhalo  India
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Quote:
Originally Posted by cdsgames View Post
100 tests minimum..

1khz, 5w
Thd+n - 101
Thd 0.00025
6.67 kHz, 5w
Thd+n 0.0025, thd 0.0023

All this data is with katana as a source, I have ordered Viktor ultralow distortion oscillators to get a true reading ( rated at - 140)

Further, I am confident, that I can improve this numbers. I will not beat Benchmark amp but will be very close to purifi amps.

Remember, unlike anyone, those numbers are not achieved with massive feedback but rather with exelency on plain old analog design. This amp has no distortion because of the way we designed. Many people liked our volt +, even though tpa3116 is nowhere as good as Tpa3255. The same philosophy was applied to this new amp and we improved on every aspect... Right now I think that output noise is close to 26uv that's more than 8db better than Ti engineers. I have a goal of 10db...or more
Any update on the amp? Asking for a friend...
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Old 21st October 2020, 04:08 PM   #1863
TNT is offline TNT  Sweden
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Location: Sweden
Shanti Dual LPS 5V/3A , 5V/1.5A
In the specs on that page:

"- Jitter under 145db at full signal"

Where is this?

# X-tal
# Oscillator
# Inlet on DAC chip
# Analog side, jitter induced sidebands (then its *not* jitter!)

Be precise and correct. Everyone benefit.

//
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Old 21st October 2020, 04:40 PM   #1864
cdsgames is offline cdsgames  Canada
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Analog output reading with no jitter reduction . 1Khz signal 0dbfs
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Old 21st October 2020, 06:31 PM   #1865
TNT is offline TNT  Sweden
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Join Date: Apr 2003
Location: Sweden
Shanti Dual LPS 5V/3A , 5V/1.5A
Hmm, still not correctly expressed. There is not thing as jitter on the analog side. What is the impact in jitter in the analog domain - that is what you are trying to describe. What is -145 dB down?

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Old 21st October 2020, 08:13 PM   #1866
Markw4 is offline Markw4  United States
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Location: California
Peak spuriea in response to J-Test, perhaps.
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Old 21st October 2020, 09:47 PM   #1867
fabflix is offline fabflix  Romania
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cdsgames, do you have any plans with the RPi Compute Module 4?
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Old 22nd October 2020, 08:37 AM   #1868
cdsgames is offline cdsgames  Canada
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I am attaching the J test data.


Yes we are already working on RPI4 CM
Attached Files
File Type: pdf J-test_boss2.pdf (47.9 KB, 37 views)
File Type: pdf FFT_1k-1.pdf (71.7 KB, 33 views)

Last edited by cdsgames; 22nd October 2020 at 08:43 AM.
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Old 22nd October 2020, 09:25 AM   #1869
TNT is offline TNT  Sweden
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Join Date: Apr 2003
Location: Sweden
Shanti Dual LPS 5V/3A , 5V/1.5A
OK! I think you should also change the wording in the description for educational reasons.

//
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Old 22nd October 2020, 09:31 AM   #1870
cdsgames is offline cdsgames  Canada
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Join Date: Jun 2015
AMP is advancing. SMPS was tested at 3A and we will do the full test at 5.5A in 50V side this week/ Second voltage is stable ..and very clean .(yes its a dual voltage LLC)



I have found more noise (compared with Volt+ D ) on output (600Khz) and I am trying to reduce it as much as I can


I have tested with D90 but found almost the same. THD is at 0.00022 at 1Khz/5W


We had tried multiple things....including voltage based reduction of gain !!. While I am not yet sure it will work, I am trying to incorporate multiple ideas..
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