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AB100 Class AB Power Amplifier
AB100 Class AB Power Amplifier
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Old 13th April 2019, 01:09 PM   #441
Abx74 is offline Abx74  France
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Hi everyone,
Is someone have some PCB in stock ? I'd like to get some to built one... Summer is coming...

Thanks

Damien
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Old 13th April 2019, 04:27 PM   #442
osscar is offline osscar  Latvia
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The officiall PCB is not yet made .... I think this amplifier is underestimated (perhaps due to dartlington output and class AB ) and forgotten - but it sounds great !!!
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Old 13th April 2019, 05:00 PM   #443
gdan is offline gdan  Greece
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AB100 Class AB Power Amplifier
Nelson,
any news about this amplifier ?

It will be a nice project for those of us with active loudspeakers that need a lot of power amplifiers and Class A is not a very practical option.
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Old 14th April 2019, 01:51 AM   #444
RafaPolit is offline RafaPolit  Ecuador
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Quote:
Originally Posted by gdan View Post
Nelson,
...It will be a nice project for those of us with active loudspeakers that need a lot of power amplifiers and Class A is not a very practical option.
??? Could you elaborate how you use an amp with active loudspeakers? Do you mean bypassing the internal amp? Which speakers would that be?

Thanks,
Rafa.
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Old 14th April 2019, 04:11 AM   #445
reggieSf25 is offline reggieSf25  United States
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Quote:
Originally Posted by gdan View Post
Nelson,
any news about this amplifier ?

It will be a nice project for those of us with active loudspeakers that need a lot of power amplifiers and Class A is not a very practical option.
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Old 15th April 2019, 09:27 AM   #446
gdan is offline gdan  Greece
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AB100 Class AB Power Amplifier
I am talking for DIY loudspeakers with active crossovers.
Mine is four way and it is not very practical to use eight Class A power amplifiers.
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Old 16th April 2019, 04:08 AM   #447
meanie is offline meanie  Singapore
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I experienced some humming from my freshly built M2X, can't determine if i had ground loop induced hum or transformer induced hum. So i did the followings...
Shifting my left channel heatsink block around while keeping the right channel where it should be.

I have to block the left channel with a iron chassis and even at an angle to the power supply board/transformer, to finally get a totally quiet left channel.

I now think that i may have to make partitions in the chassis that i m going to fit my M2X into, other than using Mumetal cover for the Edcor trans.

Click the image to open in full size.


I will try twisting those transformer secondary output cables next.
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Last edited by meanie; 16th April 2019 at 04:11 AM.
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Old 16th April 2019, 04:40 AM   #448
meanie is offline meanie  Singapore
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Very sorry i posted on wrong thread.
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Marantz 7 clone(25 years old) - BabyHuey EL34s - BA3FE - 2ACA - F6 - M2X - 2Whammy - USSA5.0 - Yarra Preamp(in progress)
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