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5F11 Vibrolux Build Mojotone

Discussion in 'Amp Central Station' started by Jazzerstang, Jan 25, 2021.

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  1. Jan 25, 2021 #1
    Jazzerstang

    Jazzerstang Tele-Afflicted

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    Hi all,

    it’s been a while since I have posted. Here is my new 5F11 I built from a Mojotone kit.

    I also shellacked the tweed and added the badge (I am a nerd).

    I would highly recommend this kit, especially if you like the later Princeton/Princeton reverb black/silverface amp. It sounds really balanced and stays relatively sparkly- clean but gradually turns to tweedy overdrive past about 7. Fantastic foot switchable trem as well!
     

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    jsnwhite619, nedorama, Jowes_84 and 8 others like this.
  2. Jan 25, 2021 #2
    Wally

    Wally Telefied Ad Free Member

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    Nice looking amp. Fwiw, that 5F11 is in essence the same circuit as the 6G2 Princeton. The simpler tone stack makes it a quite different amp compared to the BF/SF Princeton/Prin Reverb amps despite other similarities. Now, IF you get into the Rivera era Super Champ, one can get those 5F11 type so sonics due to the versatility of that Super Champ’s circuit, which evolved from the Princeton Reverb.
    Kudos on the build.
     
    Last edited: Jan 25, 2021
  3. Jan 25, 2021 #3
    Jazzerstang

    Jazzerstang Tele-Afflicted

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    Thanks very much! Yes the brown Princeton is essentially the spiritual successor of the 5f11. Great stuff.
     
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  4. Jan 25, 2021 #4
    Wally

    Wally Telefied Ad Free Member

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    beyond ‘spiritual’.....the 6G2 circuit is almost identical. It is a repackaged and renamed 5F11, imho.
     
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  5. Jan 25, 2021 #5
    Jazzerstang

    Jazzerstang Tele-Afflicted

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    Absolutely
     
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  6. Jan 25, 2021 #6
    Bob Arbogast

    Bob Arbogast Tele-Afflicted Silver Supporter

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    Nice! I've built two of those kits myself.

    I have a few questions for you:
    1. If you plug your guitar straight in, do you get any scratchiness through the amp as you turn the guitar's volume control? (On both my amps, I had to fly the 68k input resistors from the jacks because they were picking up some stray mV DC from the board itself being a bit conductive.)
    2. Do you have low volume hum through the speaker with controls at zero and no guitar plugged in? Both amps I built had that issue. It's magnetic coupling from the power transformer to the output transformer. I don't know if originals have that issue. I had two Marshall JTM-45 RI heads that both had the same issue. By the way, that hum is not a problem once you start playing . . .
    3. Are you happy with the tremolo speed? If it doesn't go slow enough for you, you can make two or even all three oscillator caps .02uF.
    4. What speaker is in the amp? I really like the GA10-SC64.
     
  7. Jan 25, 2021 #7
    Jazzerstang

    Jazzerstang Tele-Afflicted

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    1. No
    2. Yes, but like you said, you can’t really hear it when in play mode or with a band
    3. Yes, very much- great range
    4. Jensen C10q- I don’t know if it’s the greatest speaker. I’m thinking of changing it to a Celestion g10 of some sort.
     
  8. Jan 25, 2021 #8
    Bob Arbogast

    Bob Arbogast Tele-Afflicted Silver Supporter

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    I tried WGS G10C, Celestion G10 Greenback, Fender V1030, Eminence Copperhead and GA10-SC64. I remember some years ago loving a Weber Signature 10AS in a 5F11.
     
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  9. Jan 26, 2021 #9
    Jazzerstang

    Jazzerstang Tele-Afflicted

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    Which one is your favorite? I’ve used 12 inch green backs in other amps and cabs before and I remember really likening them- kind of a woody sound.
     
  10. Jan 26, 2021 #10
    DennisM

    DennisM Tele-Meister

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    Nice job! I just finished my non kit build 5f11 and it's wonderful. (ppst...I need a logo plate like that...any suggestions?)
     
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  11. Jan 26, 2021 #11
    Bob Arbogast

    Bob Arbogast Tele-Afflicted Silver Supporter

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    I like the GA10-SC64 best of all. It has more treble than any but the V1030--but not too much treble. It also has good overall clarity. The Greenback wants to speak "rock"; I prefer "blues."
     
  12. Jan 26, 2021 #12
    Jazzerstang

    Jazzerstang Tele-Afflicted

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    eBay. There’s a couple guys who make them.
     
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  13. Jan 26, 2021 #13
    Jazzerstang

    Jazzerstang Tele-Afflicted

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    Interesting
     
  14. Jan 26, 2021 #14
    DennisM

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    Thanks! Oh, and I've got a Jensen C10R in my Vibrolux and like it a lot. Sometimes these Jensen speakers get a bad rap, but I've got one in a PRRI and one in the 5f11 and both sound great to my ear. Jensen=Fender
     
  15. Jan 27, 2021 #15
    Jazzerstang

    Jazzerstang Tele-Afflicted

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    Ordered the eminence.
     
  16. Jan 28, 2021 #16
    dean

    dean Friend of Leo's

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    I’m just starting my 5f11 build, and I’m likely going to go with either a 10” Creamback or a 12” one - maybe even a neo mag Creamback. Or maybe both (I’ll do two separate baffles for the amp - 10” and 12”.
     
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  17. Jan 28, 2021 #17
    Jazzerstang

    Jazzerstang Tele-Afflicted

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    I have used greenbacks in other amps and I always liked them
     
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  18. Jan 28, 2021 #18
    Bob Arbogast

    Bob Arbogast Tele-Afflicted Silver Supporter

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    Just noticed you're in the Blackstone Valley. That's home turf for me. Whitinsville.
     
  19. Jan 28, 2021 #19
    Jazzerstang

    Jazzerstang Tele-Afflicted

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    Ha! I am there all the time. Shaw’s, McDonald’s, Unibank, Valley Cafe, Koopman’s. My father in law started Whitinsville Family Dentistry. He still practices there. Small world!
     
  20. Jan 28, 2021 #20
    Bob Arbogast

    Bob Arbogast Tele-Afflicted Silver Supporter

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    Funny thing is, we moved away in 1982 and not much has changed. My dentist was Rafael Carlos Jané--or as he used to call himself, The Great Dr. Jané!
     
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