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Allen 100-C: bypass original amps to new external sound system?

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  • Allen 100-C: bypass original amps to new external sound system?

    I finally got a home practice organ for my son, who is a student of pipe organ. I think it is an Allen 100-C, and thus made in 1970, according to the list posted here:

    https://organforum.com/forums/forum/...847#post341847

    All the keys and pedals work, all the stops seem to work. But it is not very loud.

    The seller tells me the organ has 2 amplifiers but one is blown so an Allen-competent technician bypassed one of the 2 amps, running both speakers from a single original amp.

    Would it be feasible for me to take the wires inputting to those 2 original amps and run them instead into some aftermarket external preamplifier or processor from which I could send line inputs to various external amplifiers and speaker systems, and/or to external powered home stereo speakers or keyboard amplifiers resembling electric guitar amplifiers?

  • #2
    The audio level out of a MOS1 organ is not high enough to drive a standard "home" audio amplifier. It would also need a preamp stage like a mixer. Why bother with all that extra stuff if it is just the Allen amp? They're (used) cheaply available on Ebay, probably for less than you pay the technician. If it is the 50(40?) watt model I could send you one just for the shipping. I love to help students out, it's part of our mission.
    Can't play an note but love all things "organ" Responsible for 2/10 Wurli pipe organ, Allen 3160(wife's), Allen LL324, Allen GW319EX, ADC4600, many others. E-organ shop to fund free organ lessons for kids.

    Comment


    • myorgan
      myorgan commented
      Editing a comment
      I believe I may have one of those amps as well. I could even deliver it depending on where in New England you are located.

      Michael

  • #3
    If interested, take a look at my post just now on my thread, see post #13 where I talk about putting a modern amp on an old MOS organ quite similar to yours:

    https://organforum.com/forums/forum/...res#post729346
    John
    ----------
    *** Please post your questions about technical service or repair matters ON THE FORUM. Do not send your questions to me or another member by private message. Information shared is for the benefit of the entire organ community, but other folks will not be helped by information we exchange in private messages!

    https://www.facebook.com/pages/Birds...97551893588434

    Comment


    • #4
      Thank you John Vanderlee and "myorgan", I gratefully accept an Allen amp to bring this organ back to original power. I am in Oxford CT and would enjoy a reasonable ride with my son to get it, or ship if too far.

      Meanwhile jbird, I read your report on the amp swap and quickly imagine sound possibilities if I can just also get a "line out" compatible with a preamp allowing me multiple amps and speakers throughout the house.

      Comment


      • myorgan
        myorgan commented
        Editing a comment
        Originally posted by Will Wilkin
        I am in Oxford CT and would enjoy a reasonable ride with my son to get it, or ship if too far.
        In that case, you're about 1-2 hours from John, and about 5-6 hours from me. John, let me know if yours is unavailable, and I can make arrangements for mine.

        Michael

    • #5
      Sure, I am going into the shop this afternoon. I have a collection of them. I'll verify a working pair and Will may have them both. We can arrange pickup at mutual convenience.
      John
      Can't play an note but love all things "organ" Responsible for 2/10 Wurli pipe organ, Allen 3160(wife's), Allen LL324, Allen GW319EX, ADC4600, many others. E-organ shop to fund free organ lessons for kids.

      Comment


      • #6
        Thanks John, do I read you as if amps should be replaced in pairs? I imagine I should find the model number on the existing bad amp and compare it to the pair you are offering?

        ​​​​

        Comment


        • myorgan
          myorgan commented
          Editing a comment
          That couldn't hurt. However, MOS-1 organs generally only used 1-2 styles of amplifiers. They look different, but work the same.

          Michael
          Last edited by myorgan; 07-14-2020, 06:53 PM.

      • #7
        I just need to get rid of some stuff. It helps me out.
        Can't play an note but love all things "organ" Responsible for 2/10 Wurli pipe organ, Allen 3160(wife's), Allen LL324, Allen GW319EX, ADC4600, many others. E-organ shop to fund free organ lessons for kids.

        Comment


        • #8
          I checked my "stock" and found a bunch of them. There are different input jack configurations on the chassis. Actually any type of that can easily be changed to the other. So just to be sure I give you(Will Wilkins) the right ones - or fix one so they are - please post or send some pictures of the ones you have. We can continue this on PM if you like, and make the arrangements. For general knowledge and to the Forum, I did notice that earlier ones used discrete components for the preamp stage in those amps. For curiosity's sake, when did that hangover to an IC design occur?
          Can't play an note but love all things "organ" Responsible for 2/10 Wurli pipe organ, Allen 3160(wife's), Allen LL324, Allen GW319EX, ADC4600, many others. E-organ shop to fund free organ lessons for kids.

          Comment


          • #9
            Not "hangover" but CHANGEOVER. I was sober.. honest!
            Can't play an note but love all things "organ" Responsible for 2/10 Wurli pipe organ, Allen 3160(wife's), Allen LL324, Allen GW319EX, ADC4600, many others. E-organ shop to fund free organ lessons for kids.

            Comment


            • myorgan
              myorgan commented
              Editing a comment
              You expect us to believe that?!!! Sorry, I couldn't resist.

              Michael

          • #10
            Thanks again John, I will pull the organ away from the wall and open it up to view the amps and their terminal style. Then I'll post a pic here.

            Comment

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