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Chip Amps Amplifiers based on integrated circuits

Compact Sized LME49810/11 +ThermalTrak Amp
Compact Sized LME49810/11 +ThermalTrak Amp
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Old 28th December 2012, 09:05 AM   #301
Idefixes is offline Idefixes  France
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Hi panson,

On compact size board rev 2.1 there no zobel and no output coil, but i see in one of your building that thay are présent direct on speaker binding post. So they seems to be necessary, have you value for these? What about your work on adding diode to improve thermal compensation?

Marc

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Old 1st January 2013, 05:22 PM   #302
Adrculda is offline Adrculda  Canada
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Happy New Year Panson

Quick questions about your initial series boards.
I'm assuming that they can be run in a Class H mode with the proper stepper driver ?
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Old 25th September 2013, 10:23 AM   #303
igorkooo is offline igorkooo  Croatia
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Originally Posted by panson_hk View Post
I want to make a 2nd generation of this amp board. A Baker clamp as shown in Fig. 17.2 of Bob's book is being considered for LME49811. A sketch is show below. Any comment?
Hi Panson,
I just started considering building an amp based on LME49811 and ThermalTrack transistors and I saw that you have that already built for me
However, there is one thing that I've noticed. Have you considered the difference between temperature coefficient of the junction voltage in MUR120 (the diode part) which is 1.7mV/C and NJL3281 which is 2.1mV/C ? I am not sure if that matters in the real life application, however Bob Cordell in his Designing Audio Power Ams, pg. 305 and after that thinks that it matters.
His suggestion is introducing compensator added to the bias transistor that involves (in one suggested setup) 4 resistors and 1 low-power transistor.

Igor
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Old 21st December 2014, 01:48 PM   #304
manudrz is offline manudrz  France
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Hi, Panson Audio still alive ? 2 of the 3 compact series kits on their website are marked "release soon". Anybody know if and when it will be released ?
Thanks
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Old 21st December 2014, 02:17 PM   #305
dirkwright is offline dirkwright  United States
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I have a couple of their boards, but have not done anything with them.
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Old 22nd December 2014, 12:03 AM   #306
panson_hk is offline panson_hk  Hong Kong
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Hi,

Merry Christmas ! I am still alive, but "lazy". I am spending most time on loudspeaker lately due to my full-time job. Amplifier is still my main interest. But my boss is acoustic now. I will update my kits.

I enjoy doing speaker stuffs. I learn more about audio systems and good for amplifier side.

Cheers,
Panson

Last edited by panson_hk; 22nd December 2014 at 12:13 AM.
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Old 29th December 2014, 09:57 AM   #307
manudrz is offline manudrz  France
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Ok, thanks for the reply
I will keep an eye on your website, in a few time I will need a 6 channels amplifier for active diy speakers...
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Old 12th February 2018, 04:42 PM   #308
Telstar is offline Telstar  Italy
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Originally Posted by panson_hk View Post
Amplifier is still my main interest.
Hi, are you still around?
I'm looking for a higher power version of your lovely amp.
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Old 15th February 2018, 02:10 PM   #309
panson_hk is offline panson_hk  Hong Kong
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Quote:
Originally Posted by Telstar View Post
Hi, are you still around?
I'm looking for a higher power version of your lovely amp.
Hi,

Thanks for your message.

I am still around and focusing on loudspeaker driver design. Knowledge gained for this area would help me to better under amplifier and speaker interaction.

The driver chips are no longer supplied by TI. It is time to think something else.
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Old 15th February 2018, 02:50 PM   #310
tomchr is offline tomchr  Canada
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Yeah. The discontinuance of the LME49810, 811, and 830 is a real bummer. They were really nice chips. I was about to design a high-power amp around those when TI dropped them.

I ended up with six LM3886es in a balanced composite topology instead: Modulus-686: 380W (4Ω); 220W (8Ω) Balanced Composite Power Amp with extremely low THD

Tom
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