Guidance re 4 inputs

Discussion in 'Other Amps' started by Wailing, Jan 24, 2021.

  1. Wailing

    Wailing Active Member

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    A2572819-5AA8-4C19-861C-BEF9C4FA0985.jpeg Hi Folks... Could anyone give me a steer with regard to what the 4 inputs do on my Nolan amp please ?
     
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  2. Travis398

    Travis398 Well-Known Member

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    Looks like you have a Hi and Low input for each channel. You may need to plug in to verify, but I would guess the left two jacks is for volume 1 and the right 2 jacks is for volume 2. Top jacks are probably hi input bottom low input.
    One channel is probably more highs and the other channel more lows and of course you can put a jumper cable between the channels so you can run both volumes and have the best of both worlds.
     
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  3. scozz

    scozz Well-Known Member Gold Supporting Member

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    Looks like it’s a Plexi takeoff.
     
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  4. Wailing

    Wailing Active Member

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    Thanks for the responses, how would I run a ‘jumper cable’ ? and how would it affect the tone ?
     
  5. pedecamp

    pedecamp Well-Known Member

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    Buddy do you have a patch cable, youre gonna have to just try it and see what you like. Typically plug guitar into top left input, patch cable into bottom left input, other end of patch cable into top right input, dial up both volumes to a mix you like. I typically do this with single coil guitars to fatten the tone, with humbucker guitars I dont jumper the channels at all and just plug into the top left input and leave the other channel off.
     
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  6. Travis398

    Travis398 Well-Known Member

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    Pedecamp is right just take a regular patch cable or a short fancy one like this

    1959-jump.jpg
     
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  7. Gene Ballzz

    Gene Ballzz Well-Known Member

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    Few folks actually understand the complex interactions of the standard Fender/Marshall 2-channel/4-jack input arrangement. Below is a link to a detailed description of the whole setup, including what can be expected from each different jumpering configuration along with the actual impedances derived from Rob doing all the math!

    And FWIW, I'd love to know more about that very rare and highly regarded "Nolan" amplifier!

    Just Jumpin'
    Gene


    https://robrobinette.com/How_Fender_Input_Jacks_Work.htm
     
  8. Wailing

    Wailing Active Member

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    Cheers folks... great source of knowledge.. will post some pictures ASAP
     
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  9. Wailing

    Wailing Active Member

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  10. scozz

    scozz Well-Known Member Gold Supporting Member

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  11. Wailing

    Wailing Active Member

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    Which of the Marshall or Fender amps does this amp resemble?
     
  12. Gene Ballzz

    Gene Ballzz Well-Known Member

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    WOW! Even though that's a printed circuit board, the traces look mighty robust! NOICE! And while there appear to be multiple taps on the output transformer, there is no simple means of selecting them?
    Odd?
    Gene
     
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  13. Adieu

    Adieu Well-Known Member

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    Printed? Looks etched
     
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  14. Wailing

    Wailing Active Member

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    I think you are correct Adieu, I think the chap who serviced it for me said the board was etched, I am guessing etching the board is a more laborious process than printed boards. Unfortunately I do not have the technological knowledge to respond to the output transformer question. The amp can produce thick clean tones and then moves to a mid toned crunch with ease. Any other thoughts on which model it resembles?
     
  15. mirrorman

    mirrorman Well-Known Member

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    When I first saw the pic, I immediately thought of a Hiwatt DR-504 with the controls, inputs and switches backwards.
     
  16. ibmorjamn

    ibmorjamn Well-Known Member

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  17. ibmorjamn

    ibmorjamn Well-Known Member

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    You could get a ohm meter and check to see what inputs have , not powered , plug in cable and check each set of inputs.
     
  18. ibmorjamn

    ibmorjamn Well-Known Member

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  19. Wailing

    Wailing Active Member

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  20. ibmorjamn

    ibmorjamn Well-Known Member

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    I have not seen a schematic but the plexi’s were closely derived from the fender’s.
     
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