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Jeff,

Just ignore that 5-pin Amphenol connector on the back of your AO39 amp. It
is there to connect a Hammond Tone Cabinet to the organ. You could rewire
it, and maybe hide your hook-up kit inside the AO39, but the easy way out is
just to add on a Leslie hook-up kit. Unless you have the ultra-rare A-100
with the finished back, and you don't want to add holes.

You can buy the 6147 kit from several on-line sources, or you could build
your own. The stock hook-up for a 147 / A-100 combination is what I saw
someone post in response to your question. The AO39 outputs (speaker leads)
feed the Leslie. You use a Tremolo switch to control Leslie speed (with AC
switching), and an Echo switch to select either organ speakers, Leslie, or
both. The console load selector on the 147 amp must be set to 8 ohms! You
get Reverb only through the organ speakers.

The kit is ridiculously simple. Just a small metal box with one 6-pin
connector and some wiring. No other components needed for this hook-up. I
recently did this same hook-up. I was too cheap to fork over the $150 or so
for the kit, so I did my own.

Well, also, I decided (as always) to be difficult. I wanted to supply the
signal to the Leslie directly from the G terminals on the A-100's AO28
pre-amp. I mainly wanted to do this to perfect a hook-up schematic so I can
hook a 147 up to my old BCV (something that God, and Don Leslie never
intended). I ended up using the transformer that was in the 122-style
hook-up kit that came with the A-100 when I bought it to convert the
balanced (2 G terminals) output of the AO28 into an unbalanced signal (1 G
and ground) for the 147.

If you are going to keep the internal speakers in the A-100, I'd go with the
factory recommended hook-up to the speaker leads, and live with Reverb at
the organ only. Why complicate things? It's a very easy hook-up. Let me know
if you need more details.

BCV-KG