Vibrolux build in the works - input mods

Discussion in 'Shock Brother's DIY Amps' started by ArcticWhite, Jul 21, 2021.

  1. ArcticWhite

    ArcticWhite Tele-Afflicted

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    I've never played an 5F11, so I don't know if all three stock inputs are useful.
    Should I build them as drawn, or is there a better way?
    Are two inputs enough, or all three useful?

    I'll be doing the adjustable bias mod. Other mods I should consider?

    I'm building on this Hammond AO-43 donor chassis.

    20210710_134545.jpg

    fender_vibrolux_5f11_sch.pdf_1 (1).png
     
    Last edited: Jul 22, 2021 at 12:20 AM
  2. jsnwhite619

    jsnwhite619 Friend of Leo's

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    Whatever is easiest. The third input is "one more lower" than the standard 1 & 2. My Les Paul stayed pretty clean up the dial on my clone using #3. If you don't need more headroom or have really hot pickups you won't miss it. 68k in the NFB opens it up for some more crunch & overdrive without getting too crazy. Fantastic amps though. I've got a few old demo clips I did a while back with mine I can post if you want something to look forward to. ;)
     
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  3. Mark the Moose

    Mark the Moose Tele-Afflicted

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    You could do a single input and a three way switch to select each of the resistance values.
     
  4. jsnwhite619

    jsnwhite619 Friend of Leo's

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    Here's clean & dirty, mine with a Cannabis Rex speaker.



     
  5. Ronno25

    Ronno25 Tele-Meister

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    You can jump the second and third inputs together with a cable, which I believe changes the impedance of the first input and subsequently the sound. I built a Harvard recently and this trick is very usable and musical. A little more breakup, a little smoother, and a little less brightness to the sound. If I were to build another Harvard or Vibrolux I would include all three inputs.
     
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