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    My KT120 / M-125's

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    Dahlberg

    Posts : 54
    Join date : 2016-09-27
    Age : 55
    Location : Sweden

    My KT120 / M-125's

    Post by Dahlberg on Sun Oct 16, 2016 6:49 pm

    Ok.
    Build threads are always fun so here goes. Started of with some paint job, primer first that went fairly well.
    Put a layer of copper paint on as well that will need some additional work before I'm satisfyed. I actually
    thought of dropping the paint job all together last night, it looked like total crap but this morning it sort of
    had settled a bit and didn't look that bad. Well a few more layers and it will look nice (i hope).

    I have recived all parts and everything has gone smothly. Ebay global shipping (the amps) was a bit frustrating
    at first but it all worked out very well.



    Last edited by Dahlberg on Tue Oct 18, 2016 5:56 am; edited 1 time in total

    Dahlberg

    Posts : 54
    Join date : 2016-09-27
    Age : 55
    Location : Sweden

    Re: My KT120 / M-125's

    Post by Dahlberg on Mon Oct 17, 2016 10:42 am

    I was asked over PM if I was going to paint the chassies as well and if so, how? No I will
    not. But if, I would either start of with an acid-primer (used mainly for painting aluminum)
    and after that applying the top coat. Next alternative would be to go for powder coating.

    Dahlberg

    Posts : 54
    Join date : 2016-09-27
    Age : 55
    Location : Sweden

    Re: My KT120 / M-125's

    Post by Dahlberg on Tue Oct 18, 2016 5:53 am

    Spray painting isn't something I like to do and next time I will just leave it to someone else for powder coating.

    So for the last time then, I went for gold instead of copper.


    Dahlberg

    Posts : 54
    Join date : 2016-09-27
    Age : 55
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    Re: My KT120 / M-125's

    Post by Dahlberg on Tue Oct 18, 2016 10:35 am

    Some bad lighting and my mobile created this.  Embarassed  Well it gives a feel for the colours at least.


    LeGrace

    Posts : 92
    Join date : 2016-08-07

    Re: My KT120 / M-125's

    Post by LeGrace on Tue Oct 18, 2016 2:31 pm

    Should look really nice when done. Looking forward to more updates.

    Dahlberg

    Posts : 54
    Join date : 2016-09-27
    Age : 55
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    Re: My KT120 / M-125's

    Post by Dahlberg on Tue Oct 18, 2016 2:57 pm

    Coming up Smile


    GP49

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    Re: My KT120 / M-125's

    Post by GP49 on Wed Oct 19, 2016 2:20 am

    Are you baking the enamel to harden it beyond what air-drying can do?

    Dahlberg

    Posts : 54
    Join date : 2016-09-27
    Age : 55
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    Re: My KT120 / M-125's

    Post by Dahlberg on Wed Oct 19, 2016 4:33 am

    No I haven't done that. Could you please give me some hints if you have them ?
    Dont forget that we use the owen for cooking as well Cool

    Edit: Baking in progress, 100C° for 1 hour. Doesn't smell to bad Cool
    Wonder if the Mrs agrees Embarassed


    Last edited by Dahlberg on Wed Oct 19, 2016 6:13 am; edited 1 time in total

    GP49

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    Re: My KT120 / M-125's

    Post by GP49 on Wed Oct 19, 2016 5:47 am

    The principle is that enamel paints first dry by evaporation of solvents, and then cure and harden slowly by oxidation. At room temperatures the process is never complete but heat accelerates it and results in a harder finish, though not as hard or durable as powder coating.

    It doesn't work on lacquer or catalyzed two-part paints and how well it works on enamel can vary with paint formulation and paint thickness.

    In general, 350F for about a half hour is what it takes. Test it out first on a scrap piece with your particular paint, if you try it.

    Dahlberg

    Posts : 54
    Join date : 2016-09-27
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    Re: My KT120 / M-125's

    Post by Dahlberg on Wed Oct 19, 2016 6:18 am

    GP49 wrote:The principle is that enamel paints first dry by evaporation of solvents, and then cure and harden slowly by oxidation.  At room temperatures the process is never complete but heat accelerates it and results in a harder finish, though not as hard or durable as powder coating.

    It doesn't work on lacquer or catalyzed two-part paints and how well it works on enamel can vary with paint formulation and paint thickness.

    In general, 350F for about a half hour is what it takes.  Test it out first on a scrap piece with your particular paint, if you try it.

    They have been in for 45minutes so I'm rising the temp to 150C° for the last 15 minutes. Cool

    Edit: Done


    Dahlberg

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    Re: My KT120 / M-125's

    Post by Dahlberg on Wed Oct 19, 2016 7:04 am

    It seems to have gone well, thanks for the tip Smile
    Looking at them now I belive I will by another can of paint and go
    over them once again being a bit more thorough and also make sure
    not to touch anything before "baking".

    Dahlberg

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    Re: My KT120 / M-125's

    Post by Dahlberg on Wed Oct 19, 2016 9:14 am

    And now the fun begins  Very Happy


    GP49

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    Re: My KT120 / M-125's

    Post by GP49 on Wed Oct 19, 2016 10:29 am

    Dahlberg wrote:It seems to have gone well, thanks for the tip Smile
    Looking at them now I belive I will by another can of paint and go
    over them once again being a bit more thorough and also make sure
    not to touch anything before "baking".

    Looking at them up close you probably can see how the paint thickness has reduced compared to pre-baking, as the paint film cured. The technique is used a lot by car hobbyists and restorers on small metal parts. I've noticed that the baked enamel holds up a lot better under the hood in the heat of the engine.

    They look great! Be sure to thoroughly clean and re-prep the parts before respraying, but I'm sure you are doing that already.

    Dahlberg

    Posts : 54
    Join date : 2016-09-27
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    Re: My KT120 / M-125's

    Post by Dahlberg on Wed Oct 19, 2016 11:40 am

    I will go over them with some additional care before the last (?) layer of paint,
    and yes, I belive that you are right about the thickness of the paint.
    I was thinking of an additional layer of clear coat on top of the gold finish but
    it doesn't  seem that necessary. Also a risk of spoiling the hole thing so....

    And another picture  Smile


    Dahlberg

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    Re: My KT120 / M-125's

    Post by Dahlberg on Thu Oct 20, 2016 3:32 pm

    I'm putting all painted parts in the oven tomorrow Cool Put on a clear coat as well
    and if I'm reading it right that will also stand up to the baking process.

    Didn't work Sad It was probably to hot or something, but now there are some
    bubbles inside the paint. Crying or Very sad I don't have the time for this so I'm going for
    powdercoating instead.

    Dahlberg

    Posts : 54
    Join date : 2016-09-27
    Age : 55
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    Re: My KT120 / M-125's

    Post by Dahlberg on Sat Oct 22, 2016 11:43 am

    A lid over the pcb's  Smile  Will be painted the same colour, candy gold  Smile




    LeGrace

    Posts : 92
    Join date : 2016-08-07

    Re: My KT120 / M-125's

    Post by LeGrace on Sat Oct 22, 2016 12:43 pm

    Amazing build! Keep the pics coming!

    Dahlberg

    Posts : 54
    Join date : 2016-09-27
    Age : 55
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    Re: My KT120 / M-125's

    Post by Dahlberg on Sat Oct 22, 2016 5:59 pm

    About the paintjob Cool Everything looked great untill I turned
    it up to 150C°. At 100C° /45min it looked ok and if I would
    have stopped there I would have been  Very Happy cheers

    Well maybe I will spraypaint some other time, but not on this project Cool

    Dahlberg

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    Join date : 2016-09-27
    Age : 55
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    Re: My KT120 / M-125's

    Post by Dahlberg on Wed Oct 26, 2016 6:36 am

    Smile


    Dahlberg

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    Join date : 2016-09-27
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    Re: My KT120 / M-125's

    Post by Dahlberg on Fri Oct 28, 2016 7:23 am

    I had an idea to buy something like this to put on the front as an ac-switch.



    Or do something like this, probably with a sligthly smaller hole. I'm leaning in this
    direction, just have to figure out how to get the finnish done in the bottom of the hole.


    Dahlberg

    Posts : 54
    Join date : 2016-09-27
    Age : 55
    Location : Sweden

    Re: My KT120 / M-125's

    Post by Dahlberg on Fri Oct 28, 2016 7:46 am

    Another idea would be to put the ac switch where the speaker connectors
    are placed. Make a hole between the ac switch and the ac inlet for the
    fuseholder and make room for the speaker connectors between the
    ac-inlet and the rca connector. It would require some metalwork though.
    Everything moves backwards due to the wooden frame so it seems to be
    enough space.


    Dahlberg

    Posts : 54
    Join date : 2016-09-27
    Age : 55
    Location : Sweden

    Re: My KT120 / M-125's

    Post by Dahlberg on Mon Oct 31, 2016 5:14 am

    Nothing from the paintshop yet so, a little side project Cool



    Not sure if I will ever use them but if I do they will look nice enough Smile

    Dahlberg

    Posts : 54
    Join date : 2016-09-27
    Age : 55
    Location : Sweden

    Re: My KT120 / M-125's

    Post by Dahlberg on Mon Oct 31, 2016 8:18 pm

    Not done but close enough to get the idea.


    LeGrace

    Posts : 92
    Join date : 2016-08-07

    Re: My KT120 / M-125's

    Post by LeGrace on Tue Nov 01, 2016 4:59 pm

    Look forward to seeing more! Anticipation....

    Dahlberg

    Posts : 54
    Join date : 2016-09-27
    Age : 55
    Location : Sweden

    Re: My KT120 / M-125's

    Post by Dahlberg on Tue Nov 01, 2016 5:24 pm

    I got the GZ37 rectifiers yesterday Smile  Mullards this time Cool I'm still waiting for
    the transformer parts, maybe I should give the paint guys all call tomorrow.

    Stainless steel is a real pain to modify  Idea  Sad

    I'm hoping to post some pictures of a more finished project before the weekend. Lets see how that pans out Laughing

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