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    AB for M125?

    LeGrace
    LeGrace

    Posts : 330
    Join date : 2016-08-07
    Location : Ontario, Canada

    AB for M125? - Page 2 Empty Re: AB for M125?

    Post by LeGrace on Sun Aug 18, 2019 2:43 pm

    Both amps are converted and operating well. Definitely not missing those manual trim pots! Once I switched to attaching wires to the top of the board the installation process became a lot easier.

    I read about some of the early issues with these boards but the new Ver 2 clearly addresses those.

    Interesting what you find when you open up your amps after a couple years. In my case a noticeably domed cap and a couple burnt resistors. Besides the upgrade it was definitely time for a tune up!
    LeGrace
    LeGrace

    Posts : 330
    Join date : 2016-08-07
    Location : Ontario, Canada

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    Post by LeGrace on Tue Sep 03, 2019 2:49 pm

    Well with a couple weeks under the belt I can state that I am really liking these AB boards. The daily tedium of bias checking and adjustment is quickly fading into a bad memory. Unlike BAB (Before AB) the bias is always dead on now, and I mean dead on. Each day reading across tubes is exactly the same as previous day, within 0.001 V, incredible. Installing them was well worth the effort. There is an adjacent benefit as well in more consistent sound quality.
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    costerdock

    Posts : 41
    Join date : 2011-07-27

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    Post by costerdock on Mon Nov 04, 2019 6:32 pm

    Knock on wood - 10 years w/M125s - no bias issues.
    LeGrace
    LeGrace

    Posts : 330
    Join date : 2016-08-07
    Location : Ontario, Canada

    AB for M125? - Page 2 Empty Re: AB for M125?

    Post by LeGrace on Tue Nov 05, 2019 11:44 am

    costerdock wrote:Knock on wood - 10 years w/M125s - no bias issues.

    Nice track record. You must have been at the front on the line when these came out?
    deepee99
    deepee99

    Posts : 2251
    Join date : 2012-05-23
    Location : Wallace, Idaho

    AB for M125? - Page 2 Empty Re: AB for M125?

    Post by deepee99 on Wed Nov 06, 2019 2:22 am

    LeGrace wrote:Well with a couple weeks under the belt I can state that I am really liking these AB boards. The daily tedium of bias checking and adjustment is quickly fading into a bad memory. Unlike BAB (Before AB) the bias is always dead on now, and I mean dead on. Each day reading across tubes is exactly the same as previous day, within 0.001 V, incredible. Installing them was well worth the effort. There is an adjacent benefit as well in more consistent sound quality.
    After all the sturm and drang of yesteryear, it's encouraging to see LeGace having such success and dominion over the restrained electron.
    LeGrace
    LeGrace

    Posts : 330
    Join date : 2016-08-07
    Location : Ontario, Canada

    AB for M125? - Page 2 Empty Re: AB for M125?

    Post by LeGrace on Wed Nov 06, 2019 6:50 am

    Nothing worse then an unrestrained electron! It is nice just flipping them on now and no longer worrying what the bias is doing.

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