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    Going woodie. MontanaWay's modified M-125s, the Big Boppers

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    Cubdriver

    Posts : 68
    Join date : 2014-01-21
    Age : 51
    Location : Southeastern Litchfield Co, CT

    Re: Going woodie. MontanaWay's modified M-125s, the Big Boppers

    Post by Cubdriver on Wed Nov 19, 2014 12:17 am

    Nice work on those amps!  Beautiful!

    I'm getting the 'build something' itch again, and think a pair of M-125s will be causing flames & smoke to issue forth from my CC in the very near future.  I'm likely to continue my adventures in powder coating, though, rather than going with wood trim.  Thinking perhaps translucent red on the transformer end bells, and possibly a grey for the chassis (rather than leaving it bare SS).  It will hopefully be a smoother process after learning some of the quirks on the ST-70 back in Feb.

    -Pat

    sKiZo

    Posts : 1285
    Join date : 2013-04-01
    Location : Michigan USA

    Re: Going woodie. MontanaWay's modified M-125s, the Big Boppers

    Post by sKiZo on Wed Nov 19, 2014 2:05 pm

    Google "big knobs" and see what ya get ... Shocked



    I went digging deep for these when doing my ST120 build. Came with some high end Mallory controls way back when - including the graduation dials. Nice find I thought.

    deepee99 wrote:The trick is, and MontanaWay has sussed,, is to build a sufficient ground-plane into the chassis. You can't ground to wood, so there has to be a lot of metal "under the hood" so to speak to keep noise and transients at bay.

    Keeping that in mind, I considered using metal duct tape on the inside surfaces of my wood side panels. Didn't, and no issues.

    One thing I do have on my tweak list next time I get under the hood is grounding the choke coils. That's normally not an issue on a metal chassis, but I just screwed them into the wood. Amp is dead quiet as is, but ya never know ... simple eyelet and strap to common ground should do the trick.

    deepee99

    Posts : 1260
    Join date : 2012-05-23
    Location : Wallace, Idaho

    Re: Going woodie. MontanaWay's modified M-125s, the Big Boppers

    Post by deepee99 on Wed Nov 19, 2014 2:16 pm

    SKIZO,
    If it ain't broke don't fix it.
    Oh wait, I forgot. You're a bottle-head. Tear that baby apart.

    sKiZo

    Posts : 1285
    Join date : 2013-04-01
    Location : Michigan USA

    Re: Going woodie. MontanaWay's modified M-125s, the Big Boppers

    Post by sKiZo on Wed Nov 19, 2014 2:50 pm

    Fix I must!


    deepee99

    Posts : 1260
    Join date : 2012-05-23
    Location : Wallace, Idaho

    Re: Going woodie. MontanaWay's modified M-125s, the Big Boppers

    Post by deepee99 on Wed Nov 19, 2014 2:51 pm

    May the Force be with you, with all of its 600 VDC.

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    Re: Going woodie. MontanaWay's modified M-125s, the Big Boppers

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