[rodgersorgan] Re: New member with a 750 EXT spkr question.
- From: Ralph Cullen <rcullen@xxxxxxxxxxxxxxx>
- To: rodgersorgan@xxxxxxxxxxxxx
- Date: Tue, 27 May 2003 08:20:55 -0700
Hi, Just briefly:
A 750, or any other organ of that era did not have balanced outputs, but
DID have pare outputs on the input of the power amp boards. These have
their own gain controls and are easily wired and set.
Secondly, the outputs are not "Great Swell and Pedal at all, they are
generally "Flutes"; "Main" (which means Principals and maybe Great Reed and
half of the celeste from the Swell) and "Swell" which means Swell string
and chorus Reed being in the case of a 750, a Trompette at 16' 8' and 4'
The fourth channel is "Pedal" which doesnt mean pedal but rather the 16'
octave of the Flute and the Principal.
Lastly, I stand to be corrected if I have picked on the wrong model. I am
referring to a 750B which may be slightly different to the original 750
Cheers,
Ralph Cullen
Rodgers Veteran,
New Zealand.
At 08:22 PM 5/25/2003 -0700, you wrote:
>Greetings,
>
>The Rodgers organ that was pulled out had three balanced line audio
>outputs: great, swell, pedal. Each fed its own external power amplifier
>and speakers. Those cables, amplifiers, and speakers are still installed
>and work fine.
>
>I am seeking a way to integrate the "new" 750 (with internal speakers we
>would probably not use) so that it can feed these balanced line input
>amplifiers in a similar manner. One way might be find a place in the
>circuitry to insert high input impedance single-ended to low impedance
>balanced transformers, one for each signal source, and couple to the
>existing facility cables. Based on my past experience, just wiring into
>the internal speaker wires (of which there are two sets) may not provide
>the service and quality I'm seeking. Alternatively, there might be
>something from Rodgers (like there was in the previous organ) to
>conveniently provide the converted set of signals.
>
>-George Hamma
>
>-------------Reply 1 ----------------------
>I have to ask how many amps are the amplifiers? The next thing I would
>think is
>that fi you spliced into the speaker wires and run them in series, you should
>be able to have all speakers working. Unless I'm misunderstanding what it is
>that you are trying to do.
>
>Rich
>
>----- Original Message -----
>From: noel jones
>Sent: Sunday, May 25, 2003 8:31 PM
>To: rodgersorgan@xxxxxxxxxxxxx
>Subject: [rodgersorgan] New member with a 750 EXT spkr question.
>
>
>
>Greetings,
>
>I have been asked by a local church in Sunnyvale, CA that is replacing an
>older
>
>Rodgers organ with external house speakers and amplifiers with a 750 having
>internal speakers and amplifier. I'm looking for information about doing the
>internal -> external connections to the 600-ohm shielded twisted pair lines
>to
>the existing amplifiers. Naturally, we ended up with an owners manual but
>have
>
>not located any schematics so far.
>
>-George Hamma
>
>
>
>
>-----------------------
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