Advice on Swapping a Reverb Tank

Discussion in 'Amp Central Station' started by Cheap Trills, Oct 13, 2020.

  1. Cheap Trills

    Cheap Trills Tele-Holic Silver Supporter

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    I have a Reverend Hellhound that I wish had more Fender-like reverb. I don't have much experience with amps other than swapping tubes, so thought I'd ask folks here what's possible. I guess, main question is -- is it possible to swap the tank? If so, aside from the physical measurements of the tank fitting, what specs do I need to look for? I see numbers for input impedence, output impedence, ohms.. I really don't understand these things... If they all match the factory tank, is it possible to swap it in? Do they all need to be the same values?

    Thanks in advance!
     
  2. wabashslim

    wabashslim Tele-Afflicted

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    For best results they should be in the ballpark but it's not going to hurt anything if they're not all that close, except maybe the sound, but even then, this isn't an audiophile thing.

    The only tank I ever swapped was in a Vox Pathfinder 15R, switching to a tank some people on here recommended. It sounds as bad or worse than the one I took out. Just a little PSA...
     
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  3. uriah1

    uriah1 Telefied Gold Supporter

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    Ya, accutronics I use to use. They 2, 3 and 4 spring. Both short and long.

    Check compatability though. Should be ok. Naylor was pretty good without
    anything too weird.
     
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  4. ale.istotle

    ale.istotle Tele-Holic Silver Supporter

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    Reverend says their tanks are Accutronics model #8AB2A1B which are short tanks. If you want sound you want corresponds to a Fender with a long tank maybe go external?
     
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  5. Chud

    Chud Poster Extraordinaire

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    Or maybe go with the Princeton replacement tank 8EB2C1B
     
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  6. J-Flanders

    J-Flanders Tele-Meister

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    If you tell us the numbers that are on your current tank we can suggest a correct replacement.
    The numbers on the sticker or printed/stamped on the top or side:
    For example:
    [​IMG]
    [​IMG]
     
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  7. Cheap Trills

    Cheap Trills Tele-Holic Silver Supporter

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    Thanks all for the information.
    Yes, I looked at the specs for that one (8AB2A1B) which is what's currently in the amp, and tried to find a longer one that matched. I am thinking this one-- 9AB3C1B ?
     
  8. J-Flanders

    J-Flanders Tele-Meister

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    9= long pan 3 springs
    8= short pan 3 springs
    4= long pan 2 springs

    AB = input/output impedance (must match!)

    3 = long decay (2=medium, 1=short)

    A= Connectors Insulated/Non-Insulated (must match!)

    The last two don't matter much:
    1: Locking device
    B: Mounting plain (horizontal, vertical, bottom up or down)

    The 'C' in your suggested 9AB3C1B pan is wrong. Depending on the circuit it can still work but I wouldn't count on it. You need an 'A' there.

    8 and 9 pans have 3 springs and tend to sound more hall-like, less springy, more dense and diffuse.

    If it were me I'd choose the 'iconic' 4 pan. In your case: 4AB3A1B

    Pans do vary wildly among manufacturers and even among different production runs or batches.
     
  9. Cheap Trills

    Cheap Trills Tele-Holic Silver Supporter

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    Thanks for all this info! I wish I read this before clicking order on that tank... I jumped the gun. I would also rather have a more springy reverb. I'm going to see if I can cancel the order and purchase the one you suggest
     
  10. J-Flanders

    J-Flanders Tele-Meister

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    Worst case scenario you can modify the pan yourself by connecting/disconnection the ground at the plug of your pan.

    If we have a schematic of the reverb circuit we could check if it needs modification or not.
    Is it tube driven or opamp driven?
     
  11. teleplayr

    teleplayr Tele-Afflicted

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    There are charts online that will tell you what tanks are interchangeable with what you currently have.
     
  12. zook

    zook Friend of Leo's

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    I found the same result with mine. There's too much dwell on the reverb. I haven't found a way to reduce it yet.
     
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