Dual Eq 'soldano Slo'

Discussion in 'Building the Classics' started by Thiez, Oct 30, 2017.

  1. Thiez

    Thiez Well-Known Member

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    Last weekend i've started my build on an dual eq 'soldano SLO'. I will start with building the standard schematic with dual EQ section, if it works i'll maybe start modding it to taste.


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    Last edited: Oct 30, 2017
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  2. danfrank

    danfrank Well-Known Member

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    Hi. Interesting project! At the bare minimum, you will need one more 12AX7 and a couple of relays for switching or to do it with completely dedicated circuitry for each channel, you will need 3 extra 12AX7 tubes.
    Or you can take out the effects loop and use that 12AX7 to drive the other EQ section to keep the preamp count to the original 5 12AX7s.
    Please keep us updated with your progress...
     
  3. Crunchifyable

    Crunchifyable Well-Known Member

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    Thank you for posting. I am very interested to see how you handle wiring and use of board space. Do you plan to use some kind of turret board or do you have a PCB in mind?

    Someday I might have to build something like this.
     
  4. Thiez

    Thiez Well-Known Member

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    I've got a PCB bought from SLOCloneforum i'm gonna use. For the second Eq i will add a PCB board i designed myself. For the layout i'm not sure yet... The PCB is designed so it can be put on top of the main PCB (right over the place where the EQ is on the main board), but have to check if is will give me noise problems or not.

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  5. liontato

    liontato Well-Known Member

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    Very interesting! Keep us updated!
     
  6. jensvonbustenskjol

    jensvonbustenskjol Active Member

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    Neat!
    Good luck! Can't wait for the outcome ☺️
     
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  7. DeathAdder

    DeathAdder Active Member

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    Where did you get the chassis, C3 Amps? Are you going to use his O'netics transformers? I have had good luck but I also did one with Heyboers. (wow I have a lot of questions)....

    Are you going to do the straight wire heater thing or twist them up? I know the straight wire way works fine but it's very hard to get that wire completely straight. I know Mike has some kind of machine that pumps that stuff out. You're obviously an engineer if you're doing the design yourself, or just very good. I would love to see the schematics (after you've tested the amp of course)!

    Very ambitious project. The thing about deciding on an amp to build is the availability of a good chassis. Fender chassis are all over the place, Marshall's too. Rob has some very good stuff over at C3. Did he drill and powder coat it for you or did he just sell you a blank? Man, that guy does some terrific work. I got a custom made head from him that was just beautiful. Put a Soldano logo on the front and you couldn't tell the difference.

    I will definitely keeping a watch on this thread. Good luck! -Dave
     
  8. Thiez

    Thiez Well-Known Member

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    Made the chassis myself, i can use the metal workshop at my work ;-) 3mm aluminium chassis, corners TIG-welded.

    For the transformers i use IG transformers. It was a german transformer builder who made copies of original SLO and classic Marshall transformers. He doesn't make them anymore, he did the work next to his dayjob and the transformers became to popular to keep up with the orders.

    The painting of the chassis was a pain in the ass!! First and last time i'm doing a white painted chassis haha, you can see even the smallest dirt or dust in the paint. Next amp will be black chassis with faceplates again instead of a white painted chassis with waterslide decal.

    Soon will post an update, i'm done with the decal, now busy with the clear coat. After that i can install all chassis components.
     
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  9. Thiez

    Thiez Well-Known Member

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    Like i said last time with paint and waterslide decal. Next time i will be using faceplates again. But the result is quiet okay.


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  10. danfrank

    danfrank Well-Known Member

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    Very nice work!
     
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  11. Ghostman

    Ghostman Well-Known Member

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    That looks fantastic!
     
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  12. Thiez

    Thiez Well-Known Member

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    Allright, chassis is allmost done, only some christmas light needed for power indicator and channel indicator lights.


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  13. jensvonbustenskjol

    jensvonbustenskjol Active Member

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    That's just wicked!! :dude:
     
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  14. Crunchifyable

    Crunchifyable Well-Known Member

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    Just envious of how good it looks. You simply can't buy a chassis that looks that good, and it completely matches those transformers.

    It's like art on display. Imagine a headshell you can look into...and maybe valve covers in black as well.
     
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  15. m1989jmp

    m1989jmp Active Member

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    Is Ingo still winding transformers?

    I tried to contact him a year ago and got no response...
     
  16. Thiez

    Thiez Well-Known Member

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    No, he stopt making transformers. To bad, cause they are really good quality. I've ordered these transformers several years ago allready for this build, short after the order he stopt taking orders because he coudn't keep up with deliviry and had a deliverytime of 3 months or so. Then he desided to finish all the orders he had running and stop bussiness.
     
  17. m1989jmp

    m1989jmp Active Member

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    Yeah I've heard they're top notch; they look cool too.
     
  18. Thiez

    Thiez Well-Known Member

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    Starting to come together, few more parts and ready to go.

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  19. tschrama

    tschrama Well-Known Member

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    Ahhh.... thats a lively sight. Keep posting!
     
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  20. Thiez

    Thiez Well-Known Member

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    Slowly there is some progress

    [​IMG]
     
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