Leslie 147 to M3 via 1/4" Cable

[jimmywilliams]

bbarliak,

Since you seem familiar with guitar, look at it this way. The Leslie amp, unlike a guitar amp, only has a power stage, and no preamp stage. So you need a fairly hot input signal to drive it.
The 147 type kits designed for organs tapped off the speaker leads, which are already amped up. Then at the 147 amp, there is a console load resistor to match the speaker load that the organ's amp expects to see.
To address your general question, yes it is possible to run a 1/4" line into the Leslie with a sufficient adapter and also making sure that the signal you are sending to it is properly pre-amped.
If you want the flexibility to run either your organ or another instrument into the Leslie you could tap off the ORGAN speaker leads and make sure the console load resistor is in place at the Leslie.
To run other instruments into there, you would need to pre-amp them (about 40db gain should be OK) but then also take the console load resistor out of circuit.
There are Commercial (edit) products to do this stuff or you can roll your own. Please be very familiar with the 147 interface pin configuration though. Most of the pins handle 120v AC so be careful!

[jdoc]

drive it with a guitar amp setting the load resistor appropriately........I think that is also what Wes did, I used a 15 watt Fender Rumble for a similar situation

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drive it with a guitar amp setting the load resistor appropriately........I think that is also what Wes did, I used a 15 watt Fender Rumble for a similar situation

also gives you nice eq etc.

[Wes]

That's exactly what I did - the load resistor plug I built is 15 ohm to match the impedance of the speaker in the amp; the amp can be set to either "8 ohm" or "16 ohm", and it can be configured to run either the internal speaker alone, external speaker alone, or both in parallel. So the guitarist has the choice of either running the Leslie, the Vox, or Leslie + Vox by setting the switches right without replugging.

Hm, I have half a mind to add a "main/ensemble/echo" switch for him so he could switch mid-set... although he hasn't asked for that, I gather most of his playing is "ensemble", and since it's a 25, the non-tremolo position is stop rather than chorale, so it probably isn't necessary.

[Tim_at_Jonas]

Have a tech install a tube preamp stage where the empty hole is plugged (that is used for the second tube in a 122 amp).

[bbarliak]

Thanks guys for the helpful advice. You answered another one of my questions before I even asked it. I was wondering if I would neeed to use a pre-amp before running a guitar through the Lesie. Thanks for clearing that up. Also, sorry for the late reply. Haven't got the chance to check the forum as much as I would have liked.

Thanks for the help.

[jdoc]

You might get enough gain with a cheap Berhiegner(can't spell today) tube mic preamp, they can drive pretty hard and mine cost $30 and has a bunch of instrument settings and features

Have a tech install a tube preamp stage where the empty hole is plugged (that is used for the second tube in a 122 amp).