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Rodgers 840 schematic? speakers?

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  • Rodgers 840 schematic? speakers?

    I am getting a Rodgers 840. The church threw out the speakers, some one told them they were “rotted”. They could have been re-foamed, but oh well.
    It’s interesting as it has MIDI.
    Does anyone know what speaker complement this organ had?
    Also might a service manual be availble anywhere?
    We don’t know what to do with this big boy yet, but we would at least like to check it 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.

  • #2
    There is not a complete technical manual for the 840 as far as I know, but there is a set of schematic diagrams. Send me a PM with your email and I will forward them to you.

    The speaker complement for the 840 was five M10's or M3's (or a combination thereof) and a P32 cabinet. You can substitute any full range cabinets for the M10/M3 channels. Allen HC-12, 14, or 15 would be fine and probably easier to find; Rodgers FR1.7's would work, too. For the pedal (bass) channel, if you can find a P32, get it, but it is the size of a chest freezer (or close to it); an Allen HC-12 would be a nice substitute in a home; for a church, use two HC-12's.

    The 840 is a nice organ--all the celestes had 61 notes. Most of the unit stops can be set to a loud or soft level--be sure to try the alternate mixtures. Note that the Pedal Grand Piano 16 can be set to play on the Great instead--press and hold set while you turn on the tab; the tab LED will flash, and then press a Great key or a Pedal key to determine where it plays.

    MIDI implementation provides 2 channels for each division.

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    • #3
      This is why I love this forum. I know of a stash of Allen HC speakers somewhere. I know they also have the HE2's. Would there be an advantage to those in this instance?
      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.

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      • #4
        I don't have experience with the HE-2's but from its basic design, it would not be my first choice. If you have the chance to "try before you buy" I'd be sure to test it out.

        HC-12's are the best for getting down into the 32 ft octave, and HC-14's or 15's do perfectly fine for anything above 32 Hz. Nice thing about the HC-12 would be to avoid a refrigerator sized Rodgers bass cabinet.

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        • #5
          HE-2 cabinets are suitable for making a big loud ugly sound, and nothing else. Allen uses them only as Festival Trumpet speakers. A typical usage is to have a relay on the channel that carries the Festival Trumpet, and to program it so that the relay trips when the Festival Trumpet stop is pulled, throwing the sound into that cabinet. The drivers in that box are not "hi-fi" at all, just super efficient and honky. Would not do at all as primary speakers on an organ, unless possibly on a reed-only channel, and then you'd need to turn the volume down on that channel.
          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!

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